Merge branch 'master' into span-attributes

.github/workflows/auto-release-pr.yml

@@ -0,0 +1,221 @@
+name: Release Proposal Approval Tracker
+
+on:
+  pull_request_review:
+    types: [submitted, dismissed]
+  pull_request:
+    types: [labeled, unlabeled, synchronize, closed]
+
+permissions:
+  contents: read
+  pull-requests: write
+  issues: write
+
+jobs:
+  check-approvals:
+    name: Track Maintainer Approvals
+    runs-on: ubuntu-latest
+    # Only run on PRs with release-proposal label
+    if: contains(github.event.pull_request.labels.*.name, 'release-proposal') && github.event.pull_request.state == 'open'
+    
+    steps:
+      - name: Check approvals and update PR
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        env:
+          MAINTAINER_LOGINS: ${{ secrets.MAINTAINER_LOGINS }}
+        with:
+          script: |
+            const pr = context.payload.pull_request;
+            
+            // Extract version from PR title (e.g., "Release Proposal: v1.2.3")
+            const versionMatch = pr.title.match(/Release Proposal:\s*(v[\d.]+(?:-[\w.]+)?)/);
+            const commitMatch = pr.body.match(/\*\*Target Commit:\*\*\s*`([a-f0-9]+)`/);
+            
+            if (!versionMatch || !commitMatch) {
+              console.log('Could not extract version from title or commit from body');
+              return;
+            }
+            
+            const version = versionMatch[1];
+            const targetCommit = commitMatch[1];
+            
+            console.log(`Version: ${version}, Target Commit: ${targetCommit}`);
+            
+            // Get all reviews
+            const reviews = await github.rest.pulls.listReviews({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: pr.number
+            });
+            
+            // Get list of maintainers
+            const maintainerLoginsRaw = process.env.MAINTAINER_LOGINS || '';
+            const maintainerLogins = maintainerLoginsRaw
+              .split(/[,;]/)
+              .map(login => login.trim())
+              .filter(login => login.length > 0);
+            
+            console.log(`Maintainer logins: ${maintainerLogins.join(', ')}`);
+            
+            // Get the latest review from each user
+            const latestReviewsByUser = {};
+            reviews.data.forEach(review => {
+              const username = review.user.login;
+              if (!latestReviewsByUser[username] || new Date(review.submitted_at) > new Date(latestReviewsByUser[username].submitted_at)) {
+                latestReviewsByUser[username] = review;
+              }
+            });
+            
+            // Count approvals from maintainers
+            const maintainerApprovals = Object.entries(latestReviewsByUser)
+              .filter(([username, review]) => 
+                maintainerLogins.includes(username) && 
+                review.state === 'APPROVED'
+              )
+              .map(([username, review]) => username);
+            
+            const approvalCount = maintainerApprovals.length;
+            console.log(`Found ${approvalCount} maintainer approvals from: ${maintainerApprovals.join(', ')}`);
+            
+            // Get current labels
+            const currentLabels = pr.labels.map(label => label.name);
+            const hasApprovedLabel = currentLabels.includes('approved');
+            const hasAwaitingApprovalLabel = currentLabels.includes('awaiting-approval');
+            
+            if (approvalCount >= 2 && !hasApprovedLabel) {
+              console.log('✅ Quorum reached! Updating PR...');
+              
+              // Remove awaiting-approval label if present
+              if (hasAwaitingApprovalLabel) {
+                await github.rest.issues.removeLabel({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: pr.number,
+                  name: 'awaiting-approval'
+                }).catch(e => console.log('Label not found:', e.message));
+              }
+              
+              // Add approved label
+              await github.rest.issues.addLabels({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: pr.number,
+                labels: ['approved']
+              });
+              
+              // Add comment with tagging instructions
+              const approversList = maintainerApprovals.map(u => `@${u}`).join(', ');
+              const commentBody = [
+                '## ✅ Approval Quorum Reached',
+                '',
+                `This release proposal has been approved by ${approvalCount} maintainers: ${approversList}`,
+                '',
+                '### Tagging Instructions',
+                '',
+                'A maintainer should now create and push the signed tag:',
+                '',
+                '```bash',
+                `git checkout ${targetCommit}`,
+                `git tag -s ${version} -m "Release ${version}"`,
+                `git push origin ${version}`,
+                `git checkout -`,
+                '```',
+                '',
+                'The release workflow will automatically start when the tag is pushed.'
+              ].join('\n');
+              
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: pr.number,
+                body: commentBody
+              });
+              
+              console.log('Posted tagging instructions');
+            } else if (approvalCount < 2 && hasApprovedLabel) {
+              console.log('⚠️  Approval count dropped below quorum, removing approved label');
+              
+              // Remove approved label
+              await github.rest.issues.removeLabel({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: pr.number,
+                name: 'approved'
+              }).catch(e => console.log('Label not found:', e.message));
+              
+              // Add awaiting-approval label
+              if (!hasAwaitingApprovalLabel) {
+                await github.rest.issues.addLabels({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: pr.number,
+                  labels: ['awaiting-approval']
+                });
+              }
+            } else {
+              console.log(`⏳ Waiting for more approvals (${approvalCount}/2 required)`);
+            }
+
+  handle-pr-closed:
+    name: Handle PR Closed Without Tag
+    runs-on: ubuntu-latest
+    if: |
+      contains(github.event.pull_request.labels.*.name, 'release-proposal') &&
+      github.event.action == 'closed' && !contains(github.event.pull_request.labels.*.name, 'released')
+    
+    steps:
+      - name: Add cancelled label and comment
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        with:
+          script: |
+            const pr = context.payload.pull_request;
+            
+            // Check if the release-in-progress label is present
+            const hasReleaseInProgress = pr.labels.some(label => label.name === 'release-in-progress');
+            
+            if (hasReleaseInProgress) {
+              // PR was closed while release was in progress - this is unusual
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: pr.number,
+                body: '⚠️ **Warning:** This PR was closed while a release was in progress. This may indicate an error. Please verify the release status.'
+              });
+            } else {
+              // PR was closed before tag was created - this is normal cancellation
+              const versionMatch = pr.title.match(/Release Proposal:\s*(v[\d.]+(?:-[\w.]+)?)/);
+              const version = versionMatch ? versionMatch[1] : 'unknown';
+              
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: pr.number,
+                body: `## 🚫 Release Proposal Cancelled\n\nThis release proposal for ${version} was closed without creating the tag.\n\nIf you want to proceed with this release later, you can create a new release proposal.`
+              });
+            }
+            
+            // Add cancelled label
+            await github.rest.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: pr.number,
+              labels: ['cancelled']
+            });
+            
+            // Remove other workflow labels if present
+            const labelsToRemove = ['awaiting-approval', 'approved', 'release-in-progress'];
+            for (const label of labelsToRemove) {
+              try {
+                await github.rest.issues.removeLabel({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: pr.number,
+                  name: label
+                });
+              } catch (e) {
+                console.log(`Label ${label} not found or already removed`);
+              }
+            }
+            
+            console.log('Added cancelled label and cleaned up workflow labels');
+            

.github/workflows/ci.yml

@@ -65,7 +65,7 @@ jobs:
       actions: write # to allow uploading artifacts and cache
     steps:
     - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
       with:
         egress-policy: audit
 
@@ -73,7 +73,7 @@ jobs:
       uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
     - name: Install Go
-      uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+      uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
       with:
         go-version: ${{ matrix.GO_SEMVER }}
         check-latest: true
@@ -162,7 +162,7 @@ jobs:
     continue-on-error: true  # August 2020: s390x VM is down due to weather and power issues
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit
           allowed-endpoints: ci-s390x.caddyserver.com:22
@@ -221,7 +221,7 @@ jobs:
     if: github.event.pull_request.head.repo.full_name == 'caddyserver/caddy' && github.actor != 'dependabot[bot]'
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit
 
@@ -233,7 +233,7 @@ jobs:
           version: latest
           args: check
       - name: Install Go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           go-version: "~1.25"
           check-latest: true

.github/workflows/cross-build.yml

@@ -51,7 +51,7 @@ jobs:
     continue-on-error: true
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit
 
@@ -59,7 +59,7 @@ jobs:
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           go-version: ${{ matrix.GO_SEMVER }}
           check-latest: true

.github/workflows/lint.yml

@@ -45,12 +45,12 @@ jobs:
 
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit
 
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           go-version: '~1.25'
           check-latest: true
@@ -73,7 +73,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit
 
@@ -90,14 +90,14 @@ jobs:
       pull-requests: write
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit
 
       - name: 'Checkout Repository'
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: 'Dependency Review'
-        uses: actions/dependency-review-action@595b5aeba73380359d98a5e087f648dbb0edce1b # v4.7.3
+        uses: actions/dependency-review-action@56339e523c0409420f6c2c9a2f4292bbb3c07dd3 # v4.8.0
         with:
           comment-summary-in-pr: on-failure
           # https://github.com/actions/dependency-review-action/issues/430#issuecomment-1468975566

.github/workflows/release-proposal.yml

@@ -0,0 +1,248 @@
+name: Release Proposal
+
+# This workflow creates a release proposal as a PR that requires approval from maintainers
+# Triggered manually by maintainers when ready to prepare a release
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version to release (e.g., v2.8.0)'
+        required: true
+        type: string
+      commit_hash:
+        description: 'Commit hash to release from'
+        required: true
+        type: string
+
+permissions:
+  contents: read
+
+jobs:
+  create-proposal:
+    name: Create Release Proposal
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+    
+    steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        with:
+          egress-policy: audit
+      - name: Checkout code
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          fetch-depth: 0
+
+      - name: Trim and validate inputs
+        id: inputs
+        run: |
+          # Trim whitespace from inputs
+          VERSION=$(echo "${{ inputs.version }}" | xargs)
+          COMMIT_HASH=$(echo "${{ inputs.commit_hash }}" | xargs)
+          
+          echo "version=$VERSION" >> $GITHUB_OUTPUT
+          echo "commit_hash=$COMMIT_HASH" >> $GITHUB_OUTPUT
+          
+          # Validate version format
+          if [[ ! "$VERSION" =~ ^v[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9.]+)?$ ]]; then
+            echo "Error: Version must follow semver format (e.g., v2.8.0 or v2.8.0-beta.1)"
+            exit 1
+          fi
+          
+          # Validate commit hash format
+          if [[ ! "$COMMIT_HASH" =~ ^[a-f0-9]{7,40}$ ]]; then
+            echo "Error: Commit hash must be a valid SHA (7-40 characters)"
+            exit 1
+          fi
+          
+          # Check if commit exists
+          if ! git cat-file -e "$COMMIT_HASH"; then
+            echo "Error: Commit $COMMIT_HASH does not exist"
+            exit 1
+          fi
+
+      - name: Check if tag already exists
+        run: |
+          if git rev-parse "${{ steps.inputs.outputs.version }}" >/dev/null 2>&1; then
+            echo "Error: Tag ${{ steps.inputs.outputs.version }} already exists"
+            exit 1
+          fi
+
+      - name: Check for existing proposal PR
+        id: check_existing
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        with:
+          script: |
+            const version = '${{ steps.inputs.outputs.version }}';
+            
+            // Search for existing open PRs with release-proposal label that match this version
+            const openPRs = await github.rest.pulls.list({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open',
+              sort: 'updated',
+              direction: 'desc'
+            });
+            
+            const existingOpenPR = openPRs.data.find(pr => 
+              pr.title.includes(version) && 
+              pr.labels.some(label => label.name === 'release-proposal')
+            );
+            
+            if (existingOpenPR) {
+              const hasReleased = existingOpenPR.labels.some(label => label.name === 'released');
+              const hasReleaseInProgress = existingOpenPR.labels.some(label => label.name === 'release-in-progress');
+              
+              if (hasReleased || hasReleaseInProgress) {
+                core.setFailed(`A release for ${version} is already in progress or completed: ${existingOpenPR.html_url}`);
+              } else {
+                core.setFailed(`An open release proposal already exists for ${version}: ${existingOpenPR.html_url}\n\nPlease use the existing PR or close it first.`);
+              }
+              return;
+            }
+            
+            // Check for closed PRs with this version that were cancelled
+            const closedPRs = await github.rest.pulls.list({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'closed',
+              sort: 'updated',
+              direction: 'desc'
+            });
+            
+            const cancelledPR = closedPRs.data.find(pr => 
+              pr.title.includes(version) && 
+              pr.labels.some(label => label.name === 'release-proposal') &&
+              pr.labels.some(label => label.name === 'cancelled')
+            );
+            
+            if (cancelledPR) {
+              console.log(`Found previously cancelled proposal for ${version}: ${cancelledPR.html_url}`);
+              console.log('Creating new proposal to replace cancelled one...');
+            } else {
+              console.log(`No existing proposal found for ${version}, proceeding...`);
+            }
+
+      - name: Generate changelog and create branch
+        id: setup
+        run: |
+          VERSION="${{ steps.inputs.outputs.version }}"
+          COMMIT_HASH="${{ steps.inputs.outputs.commit_hash }}"
+          
+          # Create a new branch for the release proposal
+          BRANCH_NAME="release_proposal-$VERSION"
+          git checkout -b "$BRANCH_NAME"
+          
+          # Calculate how many commits behind HEAD
+          COMMITS_BEHIND=$(git rev-list --count ${COMMIT_HASH}..HEAD)
+          
+          if [ "$COMMITS_BEHIND" -eq 0 ]; then
+            BEHIND_INFO="This is the latest commit (HEAD)"
+          else
+            BEHIND_INFO="This commit is **${COMMITS_BEHIND} commits behind HEAD**"
+          fi
+          
+          echo "commits_behind=$COMMITS_BEHIND" >> $GITHUB_OUTPUT
+          echo "behind_info=$BEHIND_INFO" >> $GITHUB_OUTPUT
+          
+          # Get the last tag
+          LAST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
+          
+          if [ -z "$LAST_TAG" ]; then
+            echo "No previous tag found, generating full changelog"
+            COMMITS=$(git log --pretty=format:"- %s (%h)" --reverse "$COMMIT_HASH")
+          else
+            echo "Generating changelog since $LAST_TAG"
+            COMMITS=$(git log --pretty=format:"- %s (%h)" --reverse "${LAST_TAG}..$COMMIT_HASH")
+          fi
+          
+          # Store changelog for PR body
+          echo "changelog<<EOF" >> $GITHUB_OUTPUT
+          echo "$COMMITS" >> $GITHUB_OUTPUT
+          echo "EOF" >> $GITHUB_OUTPUT
+          
+          # Create empty commit for the PR
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git commit --allow-empty -m "Release proposal for $VERSION"
+          
+          # Push the branch
+          git push origin "$BRANCH_NAME"
+          
+          echo "branch_name=$BRANCH_NAME" >> $GITHUB_OUTPUT
+
+      - name: Create release proposal PR
+        id: create_pr
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        with:
+          script: |
+            const changelog = `${{ steps.setup.outputs.changelog }}`;
+            
+            const pr = await github.rest.pulls.create({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              title: `Release Proposal: ${{ steps.inputs.outputs.version }}`,
+              head: '${{ steps.setup.outputs.branch_name }}',
+              base: 'master',
+              body: `## Release Proposal: ${{ steps.inputs.outputs.version }}
+            
+            **Target Commit:** \`${{ steps.inputs.outputs.commit_hash }}\`
+            **Requested by:** @${{ github.actor }}
+            **Commit Status:** ${{ steps.setup.outputs.behind_info }}
+            
+            This PR proposes creating release tag \`${{ steps.inputs.outputs.version }}\` at commit \`${{ steps.inputs.outputs.commit_hash }}\`.
+            
+            ### Approval Process
+            
+            This PR requires **approval from 2+ maintainers** before the tag can be created.
+            
+            ### What happens next?
+            
+            1. Maintainers review this proposal
+            2. When 2+ maintainer approvals are received, an automated workflow will post tagging instructions
+            3. A maintainer manually creates and pushes the signed tag
+            4. The release workflow is triggered automatically by the tag push
+            5. Upon release completion, this PR is closed and the branch is deleted
+            
+            ### Changes Since Last Release
+            
+            ${changelog}
+            
+            ### Release Checklist
+            
+            - [ ] All tests pass
+            - [ ] Security review completed
+            - [ ] Documentation updated
+            - [ ] Breaking changes documented
+            
+            ---
+            
+            **Note:** Tag creation is manual and requires a signed tag from a maintainer.`,
+              draft: true
+            });
+            
+            // Add labels
+            await github.rest.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: pr.data.number,
+              labels: ['release-proposal', 'awaiting-approval']
+            });
+            
+            console.log(`Created PR: ${pr.data.html_url}`);
+            
+            return { number: pr.data.number, url: pr.data.html_url };
+          result-encoding: json
+
+      - name: Post summary
+        run: |
+          echo "## Release Proposal PR Created! 🚀" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "Version: **${{ steps.inputs.outputs.version }}**" >> $GITHUB_STEP_SUMMARY
+          echo "Commit: **${{ steps.inputs.outputs.commit_hash }}**" >> $GITHUB_STEP_SUMMARY
+          echo "Status: ${{ steps.setup.outputs.behind_info }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "PR: ${{ fromJson(steps.create_pr.outputs.result).url }}" >> $GITHUB_STEP_SUMMARY

.github/workflows/release.yml

@@ -13,8 +13,322 @@ permissions:
   contents: read
 
 jobs:
+  verify-tag:
+    name: Verify Tag Signature and Approvals
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      pull-requests: write
+      issues: write
+    
+    outputs:
+      verification_passed: ${{ steps.verify.outputs.passed }}
+      tag_version: ${{ steps.info.outputs.version }}
+      proposal_issue_number: ${{ steps.find_proposal.outputs.result && fromJson(steps.find_proposal.outputs.result).number || '' }}
+    
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          fetch-depth: 0
+      # Force fetch upstream tags -- because 65 minutes
+      # tl;dr: actions/checkout@v3 runs this line:
+      #   git -c protocol.version=2 fetch --no-tags --prune --progress --no-recurse-submodules --depth=1 origin +ebc278ec98bb24f2852b61fde2a9bf2e3d83818b:refs/tags/
+      # which makes its own local lightweight tag, losing all the annotations in the process. Our earlier script ran:
+      #   git fetch --prune --unshallow
+      # which doesn't overwrite that tag because that would be destructive.
+      # Credit to @francislavoie for the investigation.
+      # https://github.com/actions/checkout/issues/290#issuecomment-680260080
+      - name: Force fetch upstream tags
+        run: git fetch --tags --force
+
+      - name: Get tag info
+        id: info
+        run: |
+          echo "version=${GITHUB_REF#refs/tags/}" >> $GITHUB_OUTPUT
+          echo "sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
+
+       # https://github.community/t5/GitHub-Actions/How-to-get-just-the-tag-name/m-p/32167/highlight/true#M1027
+      - name: Print Go version and environment
+        id: vars
+        run: |
+          printf "Using go at: $(which go)\n"
+          printf "Go version: $(go version)\n"
+          printf "\n\nGo environment:\n\n"
+          go env
+          printf "\n\nSystem environment:\n\n"
+          env
+          echo "version_tag=${GITHUB_REF/refs\/tags\//}" >> $GITHUB_OUTPUT
+          echo "short_sha=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+
+          # Add "pip install" CLI tools to PATH
+          echo ~/.local/bin >> $GITHUB_PATH
+
+          # Parse semver
+          TAG=${GITHUB_REF/refs\/tags\//}
+          SEMVER_RE='[^0-9]*\([0-9]*\)[.]\([0-9]*\)[.]\([0-9]*\)\([0-9A-Za-z\.-]*\)'
+          TAG_MAJOR=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\1#"`
+          TAG_MINOR=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\2#"`
+          TAG_PATCH=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\3#"`
+          TAG_SPECIAL=`echo ${TAG#v} | sed -e "s#$SEMVER_RE#\4#"`
+          echo "tag_major=${TAG_MAJOR}" >> $GITHUB_OUTPUT
+          echo "tag_minor=${TAG_MINOR}" >> $GITHUB_OUTPUT
+          echo "tag_patch=${TAG_PATCH}" >> $GITHUB_OUTPUT
+          echo "tag_special=${TAG_SPECIAL}" >> $GITHUB_OUTPUT
+
+      - name: Validate commits and tag signatures
+        id: verify
+        env:
+          signing_keys: ${{ secrets.SIGNING_KEYS }}
+        run: |
+          # Read the string into an array, splitting by IFS
+          IFS=";" read -ra keys_collection <<< "$signing_keys"
+          
+          # ref: https://docs.github.com/en/actions/reference/workflows-and-actions/contexts#example-usage-of-the-runner-context
+          touch "${{ runner.temp }}/allowed_signers"
+
+          # Iterate and print the split elements
+          for item in "${keys_collection[@]}"; do
+          
+            # trim leading whitespaces
+            item="${item##*( )}"
+
+            # trim trailing whitespaces
+            item="${item%%*( )}"
+            
+            IFS=" " read -ra key_components <<< "$item"
+            # git wants it in format: email address, type, public key
+            # ssh has it in format: type, public key, email address
+            echo "${key_components[2]} namespaces=\"git\" ${key_components[0]} ${key_components[1]}" >> "${{ runner.temp }}/allowed_signers"
+          done
+
+          git config set --global gpg.ssh.allowedSignersFile "${{ runner.temp }}/allowed_signers"
+
+          echo "Verifying the tag: ${{ steps.vars.outputs.version_tag }}"
+          
+          # Verify the tag is signed
+          if ! git verify-tag -v "${{ steps.vars.outputs.version_tag }}" 2>&1; then
+            echo "❌ Tag verification failed!"
+            echo "passed=false" >> $GITHUB_OUTPUT
+            git push --delete origin "${{ steps.vars.outputs.version_tag }}"
+            exit 1
+          fi
+          # Run it again to capture the output
+          git verify-tag -v "${{ steps.vars.outputs.version_tag }}" 2>&1 | tee /tmp/verify-output.txt;
+
+          # SSH verification output typically includes the key fingerprint
+          # Use GNU grep with Perl regex for cleaner extraction (Linux environment)
+          KEY_SHA256=$(grep -oP "SHA256:[\"']?\K[A-Za-z0-9+/=]+(?=[\"']?)" /tmp/verify-output.txt | head -1 || echo "")
+          
+          if [ -z "$KEY_SHA256" ]; then
+            # Try alternative pattern with "key" prefix
+            KEY_SHA256=$(grep -oP "key SHA256:[\"']?\K[A-Za-z0-9+/=]+(?=[\"']?)" /tmp/verify-output.txt | head -1 || echo "")
+          fi
+          
+          if [ -z "$KEY_SHA256" ]; then
+            # Fallback: extract any base64-like string (40+ chars)
+            KEY_SHA256=$(grep -oP '[A-Za-z0-9+/]{40,}=?' /tmp/verify-output.txt | head -1 || echo "")
+          fi
+          
+          if [ -z "$KEY_SHA256" ]; then
+            echo "Somehow could not extract SSH key fingerprint from git verify-tag output"
+            echo "Cancelling flow and deleting tag"
+            echo "passed=false" >> $GITHUB_OUTPUT
+            git push --delete origin "${{ steps.vars.outputs.version_tag }}"
+            exit 1
+          fi
+
+          echo "✅ Tag verification succeeded!"
+          echo "passed=true" >> $GITHUB_OUTPUT
+          echo "key_id=$KEY_SHA256" >> $GITHUB_OUTPUT
+
+      - name: Find related release proposal
+        id: find_proposal
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        with:
+          script: |
+            const version = '${{ steps.vars.outputs.version_tag }}';
+            
+            // Search for PRs with release-proposal label that match this version
+            const prs = await github.rest.pulls.list({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              state: 'open', // Changed to 'all' to find both open and closed PRs
+              sort: 'updated',
+              direction: 'desc'
+            });
+            
+            // Find the most recent PR for this version
+            const proposal = prs.data.find(pr => 
+              pr.title.includes(version) && 
+              pr.labels.some(label => label.name === 'release-proposal')
+            );
+            
+            if (!proposal) {
+              console.log(`⚠️  No release proposal PR found for ${version}`);
+              console.log('This might be a hotfix or emergency release');
+              return { number: null, approved: true, approvals: 0, proposedCommit: null };
+            }
+            
+            console.log(`Found proposal PR #${proposal.number} for version ${version}`);
+            
+            // Extract commit hash from PR body
+            const commitMatch = proposal.body.match(/\*\*Target Commit:\*\*\s*`([a-f0-9]+)`/);
+            const proposedCommit = commitMatch ? commitMatch[1] : null;
+            
+            if (proposedCommit) {
+              console.log(`Proposal was for commit: ${proposedCommit}`);
+            } else {
+              console.log('⚠️  No target commit hash found in PR body');
+            }
+            
+            // Get PR reviews to extract approvers
+            let approvers = 'Validated by automation';
+            let approvalCount = 2; // Minimum required
+            
+            try {
+              const reviews = await github.rest.pulls.listReviews({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                pull_number: proposal.number
+              });
+              
+              // Get latest review per user and filter for approvals
+              const latestReviewsByUser = {};
+              reviews.data.forEach(review => {
+                const username = review.user.login;
+                if (!latestReviewsByUser[username] || new Date(review.submitted_at) > new Date(latestReviewsByUser[username].submitted_at)) {
+                  latestReviewsByUser[username] = review;
+                }
+              });
+              
+              const approvalReviews = Object.values(latestReviewsByUser).filter(review => 
+                review.state === 'APPROVED'
+              );
+              
+              if (approvalReviews.length > 0) {
+                approvers = approvalReviews.map(r => '@' + r.user.login).join(', ');
+                approvalCount = approvalReviews.length;
+                console.log(`Found ${approvalCount} approvals from: ${approvers}`);
+              }
+            } catch (error) {
+              console.log(`Could not fetch reviews: ${error.message}`);
+            }
+            
+            return {
+              number: proposal.number,
+              approved: true,
+              approvals: approvalCount,
+              approvers: approvers,
+              proposedCommit: proposedCommit
+            };
+          result-encoding: json
+
+      - name: Verify proposal commit
+        run: |
+          APPROVALS='${{ steps.find_proposal.outputs.result }}'
+          
+          # Parse JSON
+          PROPOSED_COMMIT=$(echo "$APPROVALS" | jq -r '.proposedCommit')
+          CURRENT_COMMIT="${{ steps.info.outputs.sha }}"
+          
+          echo "Proposed commit: $PROPOSED_COMMIT"
+          echo "Current commit: $CURRENT_COMMIT"
+          
+          # Check if commits match (if proposal had a target commit)
+          if [ "$PROPOSED_COMMIT" != "null" ] && [ -n "$PROPOSED_COMMIT" ]; then
+            # Normalize both commits to full SHA for comparison
+            PROPOSED_FULL=$(git rev-parse "$PROPOSED_COMMIT" 2>/dev/null || echo "")
+            CURRENT_FULL=$(git rev-parse "$CURRENT_COMMIT" 2>/dev/null || echo "")
+            
+            if [ -z "$PROPOSED_FULL" ]; then
+              echo "⚠️  Could not resolve proposed commit: $PROPOSED_COMMIT"
+            elif [ "$PROPOSED_FULL" != "$CURRENT_FULL" ]; then
+              echo "❌ Commit mismatch!"
+              echo "The tag points to commit $CURRENT_FULL but the proposal was for $PROPOSED_FULL"
+              echo "This indicates an error in tag creation."
+              # Delete the tag remotely
+              git push --delete origin "${{ steps.vars.outputs.version_tag }}"
+              echo "Tag ${{steps.vars.outputs.version_tag}} has been deleted"
+              exit 1
+            else
+              echo "✅ Commit hash matches proposal"
+            fi
+          else
+            echo "⚠️  No target commit found in proposal (might be legacy release)"
+          fi
+          
+          echo "✅ Tag verification completed"
+
+      - name: Update release proposal PR
+        if: fromJson(steps.find_proposal.outputs.result).number != null
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+        with:
+          script: |
+            const result = ${{ steps.find_proposal.outputs.result }};
+            
+            if (result.number) {
+              // Add in-progress label
+              await github.rest.issues.addLabels({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: result.number,
+                labels: ['release-in-progress']
+              });
+              
+              // Remove approved label if present
+              try {
+                await github.rest.issues.removeLabel({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  issue_number: result.number,
+                  name: 'approved'
+                });
+              } catch (e) {
+                console.log('Approved label not found:', e.message);
+              }
+              
+              const commentBody = [
+                '## 🚀 Release Workflow Started',
+                '',
+                '- **Tag:** ${{ steps.info.outputs.version }}',
+                '- **Signed by key:** ${{ steps.verify.outputs.key_id }}',
+                '- **Commit:** ${{ steps.info.outputs.sha }}',
+                '- **Approved by:** ' + result.approvers,
+                '',
+                'Release workflow is now running. This PR will be updated when the release is published.'
+              ].join('\n');
+              
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: result.number,
+                body: commentBody
+              });
+            }
+
+      - name: Summary
+        run: |
+          APPROVALS='${{ steps.find_proposal.outputs.result }}'
+          PROPOSED_COMMIT=$(echo "$APPROVALS" | jq -r '.proposedCommit // "N/A"')
+          APPROVERS=$(echo "$APPROVALS" | jq -r '.approvers // "N/A"')
+          
+          echo "## Tag Verification Summary 🔐" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "- **Tag:** ${{ steps.info.outputs.version }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Commit:** ${{ steps.info.outputs.sha }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Proposed Commit:** $PROPOSED_COMMIT" >> $GITHUB_STEP_SUMMARY
+          echo "- **Signature:** ✅ Verified" >> $GITHUB_STEP_SUMMARY
+          echo "- **Signed by:** ${{ steps.verify.outputs.key_id }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **Approvals:** ✅ Sufficient" >> $GITHUB_STEP_SUMMARY
+          echo "- **Approved by:** $APPROVERS" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "Proceeding with release build..." >> $GITHUB_STEP_SUMMARY
+      
   release:
     name: Release
+    needs: verify-tag
+    if: ${{ needs.verify-tag.outputs.verification_passed == 'true' }}
     strategy:
       matrix:
         os: 
@@ -36,10 +350,12 @@ jobs:
       # https://docs.github.com/en/rest/overview/permissions-required-for-github-apps#permission-on-contents
       # "Releases" is part of `contents`, so it needs the `write`
       contents: write
+      issues: write
+      pull-requests: write
 
     steps:
     - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
       with:
         egress-policy: audit
 
@@ -49,7 +365,7 @@ jobs:
         fetch-depth: 0
 
     - name: Install Go
-      uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+      uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
       with:
         go-version: ${{ matrix.GO_SEMVER }}
         check-latest: true
@@ -98,22 +414,12 @@ jobs:
     - name: Install Cloudsmith CLI
       run: pip install --upgrade cloudsmith-cli
 
-    - name: Validate commits and tag signatures
-      run: |
-        
-        # Import Matt Holt's key
-        curl 'https://github.com/mholt.gpg' | gpg --import
-
-        echo "Verifying the tag: ${{ steps.vars.outputs.version_tag }}"
-        # tags are only accepted if signed by Matt's key
-        git verify-tag "${{ steps.vars.outputs.version_tag }}" || exit 1
-
     - name: Install Cosign
-      uses: sigstore/cosign-installer@d58896d6a1865668819e1d91763c7751a165e159 # main
+      uses: sigstore/cosign-installer@d7543c93d881b35a8faa02e8e3605f69b7a1ce62 # main
     - name: Cosign version
       run: cosign version
     - name: Install Syft
-      uses: anchore/sbom-action/download-syft@da167eac915b4e86f08b264dbdbc867b61be6f0c # main
+      uses: anchore/sbom-action/download-syft@f8bdd1d8ac5e901a77a92f111440fdb1b593736b # main
     - name: Syft version
       run: syft version
     - name: Install xcaddy
@@ -188,3 +494,72 @@ jobs:
           echo "Pushing $filename to 'testing'"
           cloudsmith push deb caddy/testing/any-distro/any-version $filename
         done
+
+    - name: Update release proposal PR
+      if: needs.verify-tag.outputs.proposal_issue_number != ''
+      uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd # v8.0.0
+      with:
+        script: |
+          const prNumber = parseInt('${{ needs.verify-tag.outputs.proposal_issue_number }}');
+          
+          if (prNumber) {
+            // Get PR details to find the branch
+            const pr = await github.rest.pulls.get({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: prNumber
+            });
+            
+            const branchName = pr.data.head.ref;
+            
+            // Remove in-progress label
+            try {
+              await github.rest.issues.removeLabel({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: prNumber,
+                name: 'release-in-progress'
+              });
+            } catch (e) {
+              console.log('Label not found:', e.message);
+            }
+            
+            // Add released label
+            await github.rest.issues.addLabels({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: prNumber,
+              labels: ['released']
+            });
+            
+            // Add final comment
+            await github.rest.issues.createComment({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: prNumber,
+              body: '## ✅ Release Published\n\nThe release has been successfully published and is now available.'
+            });
+            
+            // Close the PR if it's still open
+            if (pr.data.state === 'open') {
+              await github.rest.pulls.update({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                pull_number: prNumber,
+                state: 'closed'
+              });
+              console.log(`Closed PR #${prNumber}`);
+            }
+            
+            // Delete the branch
+            try {
+              await github.rest.git.deleteRef({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                ref: `heads/${branchName}`
+              });
+              console.log(`Deleted branch: ${branchName}`);
+            } catch (e) {
+              console.log(`Could not delete branch ${branchName}: ${e.message}`);
+            }
+          }

.github/workflows/release_published.yml

@@ -24,12 +24,12 @@ jobs:
 
     # See https://github.com/peter-evans/repository-dispatch
     - name: Harden the runner (Audit all outbound calls)
-      uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+      uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
       with:
         egress-policy: audit
 
     - name: Trigger event on caddyserver/dist
-      uses: peter-evans/repository-dispatch@ff45666b9427631e3450c54a1bcbee4d9ff4d7c0 # v3.0.0
+      uses: peter-evans/repository-dispatch@5fc4efd1a4797ddb68ffd0714a238564e4cc0e6f # v4.0.0
       with:
         token: ${{ secrets.REPO_DISPATCH_TOKEN }}
         repository: caddyserver/dist
@@ -37,7 +37,7 @@ jobs:
         client-payload: '{"tag": "${{ github.event.release.tag_name }}"}'
 
     - name: Trigger event on caddyserver/caddy-docker
-      uses: peter-evans/repository-dispatch@ff45666b9427631e3450c54a1bcbee4d9ff4d7c0 # v3.0.0
+      uses: peter-evans/repository-dispatch@5fc4efd1a4797ddb68ffd0714a238564e4cc0e6f # v4.0.0
       with:
         token: ${{ secrets.REPO_DISPATCH_TOKEN }}
         repository: caddyserver/caddy-docker

.github/workflows/scorecard.yml

@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
         with:
           egress-policy: audit
 
@@ -47,7 +47,7 @@ jobs:
           persist-credentials: false
 
       - name: "Run analysis"
-        uses: ossf/scorecard-action@05b42c624433fc40578a4040d5cf5e36ddca8cde # v2.4.2
+        uses: ossf/scorecard-action@4eaacf0543bb3f2c246792bd56e8cdeffafb205a # v2.4.3
         with:
           results_file: results.sarif
           results_format: sarif
@@ -81,6 +81,6 @@ jobs:
       # Upload the results to GitHub's code scanning dashboard (optional).
       # Commenting out will disable upload of results to your repo's Code Scanning dashboard
       - name: "Upload to code-scanning"
-        uses: github/codeql-action/upload-sarif@2d92b76c45b91eb80fc44c74ce3fce0ee94e8f9d # v3.29.5
+        uses: github/codeql-action/upload-sarif@3599b3baa15b485a2e49ef411a7a4bb2452e7f93 # v3.29.5
         with:
           sarif_file: results.sarif

admin.go

@@ -1029,6 +1029,13 @@ func handleConfig(w http.ResponseWriter, r *http.Request) error {
 			return err
 		}
 
+		// If this request changed the config, clear the last
+		// config info we have stored, if it is different from
+		// the original source.
+		ClearLastConfigIfDifferent(
+			r.Header.Get("Caddy-Config-Source-File"),
+			r.Header.Get("Caddy-Config-Source-Adapter"))
+
 	default:
 		return APIError{
 			HTTPStatus: http.StatusMethodNotAllowed,

caddy.go

@@ -975,11 +975,11 @@ func Version() (simple, full string) {
 		if CustomVersion != "" {
 			full = CustomVersion
 			simple = CustomVersion
-			return
+			return simple, full
 		}
 		full = "unknown"
 		simple = "unknown"
-		return
+		return simple, full
 	}
 	// find the Caddy module in the dependency list
 	for _, dep := range bi.Deps {
@@ -1059,7 +1059,7 @@ func Version() (simple, full string) {
 		}
 	}
 
-	return
+	return simple, full
 }
 
 // Event represents something that has happened or is happening.
@@ -1197,6 +1197,91 @@ var (
 	rawCfgMu sync.RWMutex
 )
 
+// lastConfigFile and lastConfigAdapter remember the source config
+// file and adapter used when Caddy was started via the CLI "run" command.
+// These are consulted by the SIGUSR1 handler to attempt reloading from
+// the same source. They are intentionally not set for other entrypoints
+// such as "caddy start" or subcommands like file-server.
+var (
+	lastConfigMu      sync.RWMutex
+	lastConfigFile    string
+	lastConfigAdapter string
+)
+
+// reloadFromSourceFunc is the type of stored callback
+// which is called when we receive a SIGUSR1 signal.
+type reloadFromSourceFunc func(file, adapter string) error
+
+// reloadFromSourceCallback is the stored callback
+// which is called when we receive a SIGUSR1 signal.
+var reloadFromSourceCallback reloadFromSourceFunc
+
+// errReloadFromSourceUnavailable is returned when no reload-from-source callback is set.
+var errReloadFromSourceUnavailable = errors.New("reload from source unavailable in this process") //nolint:unused
+
+// SetLastConfig records the given source file and adapter as the
+// last-known external configuration source. Intended to be called
+// only when starting via "caddy run --config <file> --adapter <adapter>".
+func SetLastConfig(file, adapter string, fn reloadFromSourceFunc) {
+	lastConfigMu.Lock()
+	lastConfigFile = file
+	lastConfigAdapter = adapter
+	reloadFromSourceCallback = fn
+	lastConfigMu.Unlock()
+}
+
+// ClearLastConfigIfDifferent clears the recorded last-config if the provided
+// source file/adapter do not match the recorded last-config. If both srcFile
+// and srcAdapter are empty, the last-config is cleared.
+func ClearLastConfigIfDifferent(srcFile, srcAdapter string) {
+	if (srcFile != "" || srcAdapter != "") && lastConfigMatches(srcFile, srcAdapter) {
+		return
+	}
+	SetLastConfig("", "", nil)
+}
+
+// getLastConfig returns the last-known config file and adapter.
+func getLastConfig() (file, adapter string, fn reloadFromSourceFunc) {
+	lastConfigMu.RLock()
+	f, a, cb := lastConfigFile, lastConfigAdapter, reloadFromSourceCallback
+	lastConfigMu.RUnlock()
+	return f, a, cb
+}
+
+// lastConfigMatches returns true if the provided source file and/or adapter
+// matches the recorded last-config. Matching rules (in priority order):
+//  1. If srcAdapter is provided and differs from the recorded adapter, no match.
+//  2. If srcFile exactly equals the recorded file, match.
+//  3. If both sides can be made absolute and equal, match.
+//  4. If basenames are equal, match.
+func lastConfigMatches(srcFile, srcAdapter string) bool {
+	lf, la, _ := getLastConfig()
+
+	// If adapter is provided, it must match.
+	if srcAdapter != "" && srcAdapter != la {
+		return false
+	}
+
+	// Quick equality check.
+	if srcFile == lf {
+		return true
+	}
+
+	// Try absolute path comparison.
+	sAbs, sErr := filepath.Abs(srcFile)
+	lAbs, lErr := filepath.Abs(lf)
+	if sErr == nil && lErr == nil && sAbs == lAbs {
+		return true
+	}
+
+	// Final fallback: basename equality.
+	if filepath.Base(srcFile) == filepath.Base(lf) {
+		return true
+	}
+
+	return false
+}
+
 // errSameConfig is returned if the new config is the same
 // as the old one. This isn't usually an actual, actionable
 // error; it's mostly a sentinel value.

caddyconfig/caddyfile/formatter.go

@@ -52,17 +52,16 @@ func Format(input []byte) []byte {
 
 		newLines int // count of newlines consumed
 
-		comment bool // whether we're in a comment
-		quoted  bool // whether we're in a quoted segment
-		escaped bool // whether current char is escaped
+		comment bool   // whether we're in a comment
+		quotes  string // encountered quotes ('', '`', '"', '"`', '`"')
+		escaped bool   // whether current char is escaped
 
 		heredoc              heredocState // whether we're in a heredoc
 		heredocEscaped       bool         // whether heredoc is escaped
 		heredocMarker        []rune
 		heredocClosingMarker []rune
 
-		nesting         int // indentation level
-		withinBackquote bool
+		nesting int // indentation level
 	)
 
 	write := func(ch rune) {
@@ -89,12 +88,8 @@ func Format(input []byte) []byte {
 			}
 			panic(err)
 		}
-		if ch == '`' {
-			withinBackquote = !withinBackquote
-		}
-
 		// detect whether we have the start of a heredoc
-		if !quoted && (heredoc == heredocClosed && !heredocEscaped) &&
+		if quotes == "" && (heredoc == heredocClosed && !heredocEscaped) &&
 			space && last == '<' && ch == '<' {
 			write(ch)
 			heredoc = heredocOpening
@@ -180,16 +175,38 @@ func Format(input []byte) []byte {
 			continue
 		}
 
-		if quoted {
+		if ch == '`' {
+			switch quotes {
+			case "\"`":
+				quotes = "\""
+			case "`":
+				quotes = ""
+			case "\"":
+				quotes = "\"`"
+			default:
+				quotes = "`"
+			}
+		}
+
+		if quotes == "\"" {
 			if ch == '"' {
-				quoted = false
+				quotes = ""
 			}
 			write(ch)
 			continue
 		}
 
-		if space && ch == '"' {
-			quoted = true
+		if ch == '"' {
+			switch quotes {
+			case "":
+				if space {
+					quotes = "\""
+				}
+			case "`\"":
+				quotes = "`"
+			case "\"`":
+				quotes = ""
+			}
 		}
 
 		if unicode.IsSpace(ch) {
@@ -245,7 +262,7 @@ func Format(input []byte) []byte {
 				write(' ')
 			}
 			openBraceWritten = false
-			if withinBackquote {
+			if quotes == "`" {
 				write('{')
 				openBraceWritten = true
 				continue
@@ -253,7 +270,7 @@ func Format(input []byte) []byte {
 			continue
 
 		case ch == '}' && (spacePrior || !openBrace):
-			if withinBackquote {
+			if quotes == "`" {
 				write('}')
 				continue
 			}

caddyconfig/caddyfile/formatter_test.go

@@ -444,6 +444,11 @@ block2 {
 			input:       "block {respond \"All braces should remain: {{now | date `2006`}}\"}",
 			expect:      "block {respond \"All braces should remain: {{now | date `2006`}}\"}",
 		},
+		{
+			description: "Preserve quoted backticks and backticked quotes",
+			input:       "block { respond \"`\" } block { respond `\"`}",
+			expect:      "block {\n\trespond \"`\"\n}\n\nblock {\n\trespond `\"`\n}",
+		},
 		{
 			description: "No trailing space on line before env variable",
 			input: `{

caddyconfig/httpcaddyfile/builtins.go

@@ -91,7 +91,7 @@ func parseBind(h Helper) ([]ConfigValue, error) {
 //	    curves    <curves...>
 //	    client_auth {
 //	        mode                   [request|require|verify_if_given|require_and_verify]
-//	        trust_pool			   <module_name> [...]
+//	        trust_pool             <module_name> [...]
 //	        trusted_leaf_cert      <base64_der>
 //	        trusted_leaf_cert_file <filename>
 //	    }
@@ -481,7 +481,7 @@ func parseTLS(h Helper) ([]ConfigValue, error) {
 	// Validate DNS challenge config: any DNS challenge option except "dns" requires a DNS provider
 	if acmeIssuer != nil && acmeIssuer.Challenges != nil && acmeIssuer.Challenges.DNS != nil {
 		dnsCfg := acmeIssuer.Challenges.DNS
-		providerSet := dnsCfg.ProviderRaw != nil || h.Option("dns") != nil
+		providerSet := dnsCfg.ProviderRaw != nil || h.Option("dns") != nil || h.Option("acme_dns") != nil
 		if len(dnsOptionsSet) > 0 && !providerSet {
 			return nil, h.Errf(
 				"setting DNS challenge options [%s] requires a DNS provider (set with the 'dns' subdirective or 'acme_dns' global option)",

caddyconfig/httpcaddyfile/serveroptions.go

@@ -18,6 +18,7 @@ import (
 	"encoding/json"
 	"fmt"
 	"slices"
+	"strconv"
 
 	"github.com/dustin/go-humanize"
 
@@ -42,12 +43,15 @@ type serverOptions struct {
 	WriteTimeout         caddy.Duration
 	IdleTimeout          caddy.Duration
 	KeepAliveInterval    caddy.Duration
+	KeepAliveIdle        caddy.Duration
+	KeepAliveCount       int
 	MaxHeaderBytes       int
 	EnableFullDuplex     bool
 	Protocols            []string
 	StrictSNIHost        *bool
 	TrustedProxiesRaw    json.RawMessage
 	TrustedProxiesStrict int
+	TrustedProxiesUnix   bool
 	ClientIPHeaders      []string
 	ShouldLogCredentials bool
 	Metrics              *caddyhttp.Metrics
@@ -142,6 +146,7 @@ func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (any, error) {
 					return nil, d.Errf("unrecognized timeouts option '%s'", d.Val())
 				}
 			}
+
 		case "keepalive_interval":
 			if !d.NextArg() {
 				return nil, d.ArgErr()
@@ -152,6 +157,26 @@ func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (any, error) {
 			}
 			serverOpts.KeepAliveInterval = caddy.Duration(dur)
 
+		case "keepalive_idle":
+			if !d.NextArg() {
+				return nil, d.ArgErr()
+			}
+			dur, err := caddy.ParseDuration(d.Val())
+			if err != nil {
+				return nil, d.Errf("parsing keepalive idle duration: %v", err)
+			}
+			serverOpts.KeepAliveIdle = caddy.Duration(dur)
+
+		case "keepalive_count":
+			if !d.NextArg() {
+				return nil, d.ArgErr()
+			}
+			cnt, err := strconv.ParseInt(d.Val(), 10, 32)
+			if err != nil {
+				return nil, d.Errf("parsing keepalive count int: %v", err)
+			}
+			serverOpts.KeepAliveCount = int(cnt)
+
 		case "max_header_size":
 			var sizeStr string
 			if !d.AllArgs(&sizeStr) {
@@ -227,6 +252,12 @@ func unmarshalCaddyfileServerOptions(d *caddyfile.Dispenser) (any, error) {
 			}
 			serverOpts.TrustedProxiesStrict = 1
 
+		case "trusted_proxies_unix":
+			if d.NextArg() {
+				return nil, d.ArgErr()
+			}
+			serverOpts.TrustedProxiesUnix = true
+
 		case "client_ip_headers":
 			headers := d.RemainingArgs()
 			for _, header := range headers {
@@ -309,6 +340,8 @@ func applyServerOptions(
 		server.WriteTimeout = opts.WriteTimeout
 		server.IdleTimeout = opts.IdleTimeout
 		server.KeepAliveInterval = opts.KeepAliveInterval
+		server.KeepAliveIdle = opts.KeepAliveIdle
+		server.KeepAliveCount = opts.KeepAliveCount
 		server.MaxHeaderBytes = opts.MaxHeaderBytes
 		server.EnableFullDuplex = opts.EnableFullDuplex
 		server.Protocols = opts.Protocols
@@ -316,6 +349,7 @@ func applyServerOptions(
 		server.TrustedProxiesRaw = opts.TrustedProxiesRaw
 		server.ClientIPHeaders = opts.ClientIPHeaders
 		server.TrustedProxiesStrict = opts.TrustedProxiesStrict
+		server.TrustedProxiesUnix = opts.TrustedProxiesUnix
 		server.Metrics = opts.Metrics
 		if opts.ShouldLogCredentials {
 			if server.Logs == nil {

caddyconfig/httpcaddyfile/tlsapp.go

@@ -554,6 +554,7 @@ func fillInGlobalACMEDefaults(issuer certmagic.Issuer, options map[string]any) e
 	globalPreferredChains := options["preferred_chains"]
 	globalCertLifetime := options["cert_lifetime"]
 	globalHTTPPort, globalHTTPSPort := options["http_port"], options["https_port"]
+	globalDefaultBind := options["default_bind"]
 
 	if globalEmail != nil && acmeIssuer.Email == "" {
 		acmeIssuer.Email = globalEmail.(string)
@@ -564,23 +565,22 @@ func fillInGlobalACMEDefaults(issuer certmagic.Issuer, options map[string]any) e
 	if globalACMECARoot != nil && !slices.Contains(acmeIssuer.TrustedRootsPEMFiles, globalACMECARoot.(string)) {
 		acmeIssuer.TrustedRootsPEMFiles = append(acmeIssuer.TrustedRootsPEMFiles, globalACMECARoot.(string))
 	}
-	if globalACMEDNSok {
+	if globalACMEDNSok && (acmeIssuer.Challenges == nil || acmeIssuer.Challenges.DNS == nil || acmeIssuer.Challenges.DNS.ProviderRaw == nil) {
 		globalDNS := options["dns"]
-		if globalDNS != nil {
-			// If global `dns` is set, do NOT set provider in issuer, just set empty dns config
-			acmeIssuer.Challenges = &caddytls.ChallengesConfig{
-				DNS: &caddytls.DNSChallengeConfig{},
-			}
-		} else if globalACMEDNS != nil {
-			// Set a global DNS provider if `acme_dns` is set and `dns` is NOT set
-			acmeIssuer.Challenges = &caddytls.ChallengesConfig{
-				DNS: &caddytls.DNSChallengeConfig{
-					ProviderRaw: caddyconfig.JSONModuleObject(globalACMEDNS, "name", globalACMEDNS.(caddy.Module).CaddyModule().ID.Name(), nil),
-				},
-			}
-		} else {
+		if globalDNS == nil && globalACMEDNS == nil {
 			return fmt.Errorf("acme_dns specified without DNS provider config, but no provider specified with 'dns' global option")
 		}
+		if acmeIssuer.Challenges == nil {
+			acmeIssuer.Challenges = new(caddytls.ChallengesConfig)
+		}
+		if acmeIssuer.Challenges.DNS == nil {
+			acmeIssuer.Challenges.DNS = new(caddytls.DNSChallengeConfig)
+		}
+		// If global `dns` is set, do NOT set provider in issuer, just set empty dns config
+		if globalDNS == nil && acmeIssuer.Challenges.DNS.ProviderRaw == nil {
+			// Set a global DNS provider if `acme_dns` is set and `dns` is NOT set
+			acmeIssuer.Challenges.DNS.ProviderRaw = caddyconfig.JSONModuleObject(globalACMEDNS, "name", globalACMEDNS.(caddy.Module).CaddyModule().ID.Name(), nil)
+		}
 	}
 	if globalACMEEAB != nil && acmeIssuer.ExternalAccount == nil {
 		acmeIssuer.ExternalAccount = globalACMEEAB.(*acme.EAB)
@@ -607,6 +607,20 @@ func fillInGlobalACMEDefaults(issuer certmagic.Issuer, options map[string]any) e
 		}
 		acmeIssuer.Challenges.TLSALPN.AlternatePort = globalHTTPSPort.(int)
 	}
+	// If BindHost is still unset, fall back to the first default_bind address if set
+	// This avoids binding the automation policy to the wildcard socket, which is unexpected behavior when a more selective socket is specified via default_bind
+	// In BSD it is valid to bind to the wildcard socket even though a more selective socket is already open (still unexpected behavior by the caller though)
+	// In Linux the same call will error with EADDRINUSE whenever the listener for the automation policy is opened
+	if acmeIssuer.Challenges == nil || (acmeIssuer.Challenges.DNS == nil && acmeIssuer.Challenges.BindHost == "") {
+		if defBinds, ok := globalDefaultBind.([]ConfigValue); ok && len(defBinds) > 0 {
+			if abp, ok := defBinds[0].Value.(addressesWithProtocols); ok && len(abp.addresses) > 0 {
+				if acmeIssuer.Challenges == nil {
+					acmeIssuer.Challenges = new(caddytls.ChallengesConfig)
+				}
+				acmeIssuer.Challenges.BindHost = abp.addresses[0]
+			}
+		}
+	}
 	if globalCertLifetime != nil && acmeIssuer.CertificateLifetime == 0 {
 		acmeIssuer.CertificateLifetime = globalCertLifetime.(caddy.Duration)
 	}

caddyconfig/load.go

@@ -121,6 +121,13 @@ func (adminLoad) handleLoad(w http.ResponseWriter, r *http.Request) error {
 		}
 	}
 
+	// If this request changed the config, clear the last
+	// config info we have stored, if it is different from
+	// the original source.
+	caddy.ClearLastConfigIfDifferent(
+		r.Header.Get("Caddy-Config-Source-File"),
+		r.Header.Get("Caddy-Config-Source-Adapter"))
+
 	caddy.Log().Named("admin.api").Info("load complete")
 
 	return nil

caddytest/integration/caddyfile_adapt/acme_dns_configured.caddyfiletest

@@ -53,6 +53,7 @@ example.com {
 								"challenges": {
 									"dns": {
 										"provider": {
+											"argument": "foo",
 											"name": "mock"
 										}
 									}

caddytest/integration/caddyfile_adapt/global_server_options_single.caddyfiletest

@@ -18,6 +18,9 @@
 		trusted_proxies static private_ranges
 		client_ip_headers Custom-Real-Client-IP X-Forwarded-For
 		client_ip_headers A-Third-One
+		keepalive_interval 20s
+		keepalive_idle 20s
+		keepalive_count 10
 	}
 }
 
@@ -45,6 +48,9 @@ foo.com {
 					"read_header_timeout": 30000000000,
 					"write_timeout": 30000000000,
 					"idle_timeout": 30000000000,
+					"keepalive_interval": 20000000000,
+					"keepalive_idle": 20000000000,
+					"keepalive_count": 10,
 					"max_header_bytes": 100000000,
 					"enable_full_duplex": true,
 					"routes": [
@@ -89,4 +95,4 @@ foo.com {
 			}
 		}
 	}
-}
+}

caddytest/integration/caddyfile_adapt/log_multiple_regexp_filters.caddyfiletest

@@ -0,0 +1,95 @@
+:80
+
+log {
+	output stdout
+	format filter {
+		wrap console
+		
+		# Multiple regexp filters for the same field - this should work now!
+		request>headers>Authorization regexp "Bearer\s+([A-Za-z0-9_-]+)" "Bearer [REDACTED]"
+		request>headers>Authorization regexp "Basic\s+([A-Za-z0-9+/=]+)" "Basic [REDACTED]"
+		request>headers>Authorization regexp "token=([^&\s]+)" "token=[REDACTED]"
+		
+		# Single regexp filter - this should continue to work as before
+		request>headers>Cookie regexp "sessionid=[^;]+" "sessionid=[REDACTED]"
+		
+		# Mixed filters (non-regexp) - these should work normally
+		request>headers>Server delete
+		request>remote_ip ip_mask {
+			ipv4 24
+			ipv6 32
+		}
+	}
+}
+----------
+{
+	"logging": {
+		"logs": {
+			"default": {
+				"exclude": [
+					"http.log.access.log0"
+				]
+			},
+			"log0": {
+				"writer": {
+					"output": "stdout"
+				},
+				"encoder": {
+					"fields": {
+						"request\u003eheaders\u003eAuthorization": {
+							"filter": "multi_regexp",
+							"operations": [
+								{
+									"regexp": "Bearer\\s+([A-Za-z0-9_-]+)",
+									"value": "Bearer [REDACTED]"
+								},
+								{
+									"regexp": "Basic\\s+([A-Za-z0-9+/=]+)",
+									"value": "Basic [REDACTED]"
+								},
+								{
+									"regexp": "token=([^\u0026\\s]+)",
+									"value": "token=[REDACTED]"
+								}
+							]
+						},
+						"request\u003eheaders\u003eCookie": {
+							"filter": "regexp",
+							"regexp": "sessionid=[^;]+",
+							"value": "sessionid=[REDACTED]"
+						},
+						"request\u003eheaders\u003eServer": {
+							"filter": "delete"
+						},
+						"request\u003eremote_ip": {
+							"filter": "ip_mask",
+							"ipv4_cidr": 24,
+							"ipv6_cidr": 32
+						}
+					},
+					"format": "filter",
+					"wrap": {
+						"format": "console"
+					}
+				},
+				"include": [
+					"http.log.access.log0"
+				]
+			}
+		}
+	},
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":80"
+					],
+					"logs": {
+						"default_logger_name": "log0"
+					}
+				}
+			}
+		}
+	}
+} 

caddytest/integration/caddyfile_adapt/reverse_proxy_trusted_proxies_unix.caddyfiletest

@@ -0,0 +1,59 @@
+{
+	servers {
+		trusted_proxies_unix
+	}
+}
+
+example.com {
+	reverse_proxy https://local:8080
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"example.com"
+									]
+								}
+							],
+							"handle": [
+								{
+									"handler": "subroute",
+									"routes": [
+										{
+											"handle": [
+												{
+													"handler": "reverse_proxy",
+													"transport": {
+														"protocol": "http",
+														"tls": {}
+													},
+													"upstreams": [
+														{
+															"dial": "local:8080"
+														}
+													]
+												}
+											]
+										}
+									]
+								}
+							],
+							"terminal": true
+						}
+					],
+					"trusted_proxies_unix": true
+				}
+			}
+		}
+	}
+}

caddytest/integration/caddyfile_adapt/tls_dns_override_acme_dns.caddyfiletest

@@ -0,0 +1,79 @@
+{
+	acme_dns mock foo
+}
+
+localhost {
+	tls {
+		dns mock bar
+		resolvers 8.8.8.8 8.8.4.4
+	}
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"localhost"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"localhost"
+						],
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"argument": "bar",
+											"name": "mock"
+										},
+										"resolvers": [
+											"8.8.8.8",
+											"8.8.4.4"
+										]
+									}
+								},
+								"module": "acme"
+							}
+						]
+					},
+					{
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"argument": "foo",
+											"name": "mock"
+										}
+									}
+								},
+								"module": "acme"
+							}
+						]
+					}
+				]
+			}
+		}
+	}
+}

caddytest/integration/caddyfile_adapt/tls_dns_override_global_dns.caddyfiletest

@@ -0,0 +1,68 @@
+{
+	dns mock foo
+}
+
+localhost {
+	tls {
+		dns mock bar
+		resolvers 8.8.8.8 8.8.4.4
+	}
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"localhost"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"localhost"
+						],
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"argument": "bar",
+											"name": "mock"
+										},
+										"resolvers": [
+											"8.8.8.8",
+											"8.8.4.4"
+										]
+									}
+								},
+								"module": "acme"
+							}
+						]
+					}
+				]
+			},
+			"dns": {
+				"argument": "foo",
+				"name": "mock"
+			}
+		}
+	}
+}

caddytest/integration/caddyfile_adapt/tls_dns_resolvers_with_global_provider.caddyfiletest

@@ -0,0 +1,76 @@
+{
+	acme_dns mock
+}
+
+localhost {
+	tls {
+		resolvers 8.8.8.8 8.8.4.4
+	}
+}
+----------
+{
+	"apps": {
+		"http": {
+			"servers": {
+				"srv0": {
+					"listen": [
+						":443"
+					],
+					"routes": [
+						{
+							"match": [
+								{
+									"host": [
+										"localhost"
+									]
+								}
+							],
+							"terminal": true
+						}
+					]
+				}
+			}
+		},
+		"tls": {
+			"automation": {
+				"policies": [
+					{
+						"subjects": [
+							"localhost"
+						],
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"name": "mock"
+										},
+										"resolvers": [
+											"8.8.8.8",
+											"8.8.4.4"
+										]
+									}
+								},
+								"module": "acme"
+							}
+						]
+					},
+					{
+						"issuers": [
+							{
+								"challenges": {
+									"dns": {
+										"provider": {
+											"name": "mock"
+										}
+									}
+								},
+								"module": "acme"
+							}
+						]
+					}
+				]
+			}
+		}
+	}
+}

caddytest/integration/h2listener_test.go

@@ -0,0 +1,129 @@
+package integration
+
+import (
+	"fmt"
+	"net/http"
+	"slices"
+	"strings"
+	"testing"
+
+	"github.com/caddyserver/caddy/v2/caddytest"
+)
+
+func newH2ListenerWithVersionsWithTLSTester(t *testing.T, serverVersions []string, clientVersions []string) *caddytest.Tester {
+	const baseConfig = `
+	{
+		skip_install_trust
+		admin localhost:2999
+		http_port     9080
+		https_port    9443
+		servers :9443 {
+            protocols %s
+        }
+	}
+	localhost {
+		respond "{http.request.tls.proto} {http.request.proto}"
+	}
+	`
+	tester := caddytest.NewTester(t)
+	tester.InitServer(fmt.Sprintf(baseConfig, strings.Join(serverVersions, " ")), "caddyfile")
+
+	tr := tester.Client.Transport.(*http.Transport)
+	tr.TLSClientConfig.NextProtos = clientVersions
+	tr.Protocols = new(http.Protocols)
+	if slices.Contains(clientVersions, "h2") {
+		tr.ForceAttemptHTTP2 = true
+		tr.Protocols.SetHTTP2(true)
+	}
+	if !slices.Contains(clientVersions, "http/1.1") {
+		tr.Protocols.SetHTTP1(false)
+	}
+
+	return tester
+}
+
+func TestH2ListenerWithTLS(t *testing.T) {
+	tests := []struct {
+		serverVersions []string
+		clientVersions []string
+		expectedBody   string
+		failed         bool
+	}{
+		{[]string{"h2"}, []string{"h2"}, "h2 HTTP/2.0", false},
+		{[]string{"h2"}, []string{"http/1.1"}, "", true},
+		{[]string{"h1"}, []string{"http/1.1"}, "http/1.1 HTTP/1.1", false},
+		{[]string{"h1"}, []string{"h2"}, "", true},
+		{[]string{"h2", "h1"}, []string{"h2"}, "h2 HTTP/2.0", false},
+		{[]string{"h2", "h1"}, []string{"http/1.1"}, "http/1.1 HTTP/1.1", false},
+	}
+	for _, tc := range tests {
+		tester := newH2ListenerWithVersionsWithTLSTester(t, tc.serverVersions, tc.clientVersions)
+		t.Logf("running with server versions %v and client versions %v:", tc.serverVersions, tc.clientVersions)
+		if tc.failed {
+			resp, err := tester.Client.Get("https://localhost:9443")
+			if err == nil {
+				t.Errorf("unexpected response: %d", resp.StatusCode)
+			}
+		} else {
+			tester.AssertGetResponse("https://localhost:9443", 200, tc.expectedBody)
+		}
+	}
+}
+
+func newH2ListenerWithVersionsWithoutTLSTester(t *testing.T, serverVersions []string, clientVersions []string) *caddytest.Tester {
+	const baseConfig = `
+	{
+		skip_install_trust
+		admin localhost:2999
+		http_port     9080
+		servers :9080 {
+            protocols %s
+        }
+	}
+	http://localhost {
+		respond "{http.request.proto}"
+	}
+	`
+	tester := caddytest.NewTester(t)
+	tester.InitServer(fmt.Sprintf(baseConfig, strings.Join(serverVersions, " ")), "caddyfile")
+
+	tr := tester.Client.Transport.(*http.Transport)
+	tr.Protocols = new(http.Protocols)
+	if slices.Contains(clientVersions, "h2c") {
+		tr.Protocols.SetHTTP1(false)
+		tr.Protocols.SetUnencryptedHTTP2(true)
+	} else if slices.Contains(clientVersions, "http/1.1") {
+		tr.Protocols.SetHTTP1(true)
+		tr.Protocols.SetUnencryptedHTTP2(false)
+	}
+
+	return tester
+}
+
+func TestH2ListenerWithoutTLS(t *testing.T) {
+	tests := []struct {
+		serverVersions []string
+		clientVersions []string
+		expectedBody   string
+		failed         bool
+	}{
+		{[]string{"h2c"}, []string{"h2c"}, "HTTP/2.0", false},
+		{[]string{"h2c"}, []string{"http/1.1"}, "", true},
+		{[]string{"h1"}, []string{"http/1.1"}, "HTTP/1.1", false},
+		{[]string{"h1"}, []string{"h2c"}, "", true},
+		{[]string{"h2c", "h1"}, []string{"h2c"}, "HTTP/2.0", false},
+		{[]string{"h2c", "h1"}, []string{"http/1.1"}, "HTTP/1.1", false},
+	}
+	for _, tc := range tests {
+		tester := newH2ListenerWithVersionsWithoutTLSTester(t, tc.serverVersions, tc.clientVersions)
+		t.Logf("running with server versions %v and client versions %v:", tc.serverVersions, tc.clientVersions)
+		if tc.failed {
+			resp, err := tester.Client.Get("http://localhost:9080")
+			if err == nil {
+				t.Errorf("unexpected response: %d", resp.StatusCode)
+			}
+		} else {
+			tester.AssertGetResponse("http://localhost:9080", 200, tc.expectedBody)
+		}
+	}
+}

caddytest/integration/mockdns_test.go

@@ -15,7 +15,9 @@ func init() {
 }
 
 // MockDNSProvider is a mock DNS provider, for testing config with DNS modules.
-type MockDNSProvider struct{}
+type MockDNSProvider struct {
+	Argument string `json:"argument,omitempty"` // optional argument useful for testing
+}
 
 // CaddyModule returns the Caddy module information.
 func (MockDNSProvider) CaddyModule() caddy.ModuleInfo {
@@ -31,7 +33,15 @@ func (MockDNSProvider) Provision(ctx caddy.Context) error {
 }
 
 // UnmarshalCaddyfile sets up the module from Caddyfile tokens.
-func (MockDNSProvider) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
+func (p *MockDNSProvider) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
+	d.Next() // consume directive name
+
+	if d.NextArg() {
+		p.Argument = d.Val()
+	}
+	if d.NextArg() {
+		return d.Errf("unexpected argument '%s'", d.Val())
+	}
 	return nil
 }
 

cmd/commandfuncs.go

@@ -231,8 +231,9 @@ func cmdRun(fl Flags) (int, error) {
 	}
 	// we don't use 'else' here since this value might have been changed in 'if' block; i.e. not mutually exclusive
 	var configFile string
+	var adapterUsed string
 	if !resumeFlag {
-		config, configFile, err = LoadConfig(configFlag, configAdapterFlag)
+		config, configFile, adapterUsed, err = LoadConfig(configFlag, configAdapterFlag)
 		if err != nil {
 			logBuffer.FlushTo(defaultLogger)
 			return caddy.ExitCodeFailedStartup, err
@@ -249,6 +250,19 @@ func cmdRun(fl Flags) (int, error) {
 		}
 	}
 
+	// If we have a source config file (we're running via 'caddy run --config ...'),
+	// record it so SIGUSR1 can reload from the same file. Also provide a callback
+	// that knows how to load/adapt that source when requested by the main process.
+	if configFile != "" {
+		caddy.SetLastConfig(configFile, adapterUsed, func(file, adapter string) error {
+			cfg, _, _, err := LoadConfig(file, adapter)
+			if err != nil {
+				return err
+			}
+			return caddy.Load(cfg, true)
+		})
+	}
+
 	// run the initial config
 	err = caddy.Load(config, true)
 	if err != nil {
@@ -295,7 +309,7 @@ func cmdRun(fl Flags) (int, error) {
 	// if enabled, reload config file automatically on changes
 	// (this better only be used in dev!)
 	if watchFlag {
-		go watchConfigFile(configFile, configAdapterFlag)
+		go watchConfigFile(configFile, adapterUsed)
 	}
 
 	// warn if the environment does not provide enough information about the disk
@@ -350,7 +364,7 @@ func cmdReload(fl Flags) (int, error) {
 	forceFlag := fl.Bool("force")
 
 	// get the config in caddy's native format
-	config, configFile, err := LoadConfig(configFlag, configAdapterFlag)
+	config, configFile, adapterUsed, err := LoadConfig(configFlag, configAdapterFlag)
 	if err != nil {
 		return caddy.ExitCodeFailedStartup, err
 	}
@@ -368,6 +382,10 @@ func cmdReload(fl Flags) (int, error) {
 	if forceFlag {
 		headers.Set("Cache-Control", "must-revalidate")
 	}
+	// Provide the source file/adapter to the running process so it can
+	// preserve its last-config knowledge if this reload came from the same source.
+	headers.Set("Caddy-Config-Source-File", configFile)
+	headers.Set("Caddy-Config-Source-Adapter", adapterUsed)
 
 	resp, err := AdminAPIRequest(adminAddr, http.MethodPost, "/load", headers, bytes.NewReader(config))
 	if err != nil {
@@ -582,7 +600,7 @@ func cmdValidateConfig(fl Flags) (int, error) {
 			fmt.Errorf("input file required when there is no Caddyfile in current directory (use --config flag)")
 	}
 
-	input, _, err := LoadConfig(configFlag, adapterFlag)
+	input, _, _, err := LoadConfig(configFlag, adapterFlag)
 	if err != nil {
 		return caddy.ExitCodeFailedStartup, err
 	}
@@ -797,7 +815,7 @@ func DetermineAdminAPIAddress(address string, config []byte, configFile, configA
 		loadedConfig := config
 		if len(loadedConfig) == 0 {
 			// get the config in caddy's native format
-			loadedConfig, loadedConfigFile, err = LoadConfig(configFile, configAdapter)
+			loadedConfig, loadedConfigFile, _, err = LoadConfig(configFile, configAdapter)
 			if err != nil {
 				return "", err
 			}

cmd/main.go

@@ -100,7 +100,12 @@ func handlePingbackConn(conn net.Conn, expect []byte) error {
 // there is no config available. It prints any warnings to stderr,
 // and returns the resulting JSON config bytes along with
 // the name of the loaded config file (if any).
-func LoadConfig(configFile, adapterName string) ([]byte, string, error) {
+// The return values are:
+//   - config bytes (nil if no config)
+//   - config file used ("" if none)
+//   - adapter used ("" if none)
+//   - error, if any
+func LoadConfig(configFile, adapterName string) ([]byte, string, string, error) {
 	return loadConfigWithLogger(caddy.Log(), configFile, adapterName)
 }
 
@@ -138,7 +143,7 @@ func isCaddyfile(configFile, adapterName string) (bool, error) {
 	return false, nil
 }
 
-func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([]byte, string, error) {
+func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([]byte, string, string, error) {
 	// if no logger is provided, use a nop logger
 	// just so we don't have to check for nil
 	if logger == nil {
@@ -147,7 +152,7 @@ func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([
 
 	// specifying an adapter without a config file is ambiguous
 	if adapterName != "" && configFile == "" {
-		return nil, "", fmt.Errorf("cannot adapt config without config file (use --config)")
+		return nil, "", "", fmt.Errorf("cannot adapt config without config file (use --config)")
 	}
 
 	// load initial config and adapter
@@ -158,13 +163,13 @@ func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([
 		if configFile == "-" {
 			config, err = io.ReadAll(os.Stdin)
 			if err != nil {
-				return nil, "", fmt.Errorf("reading config from stdin: %v", err)
+				return nil, "", "", fmt.Errorf("reading config from stdin: %v", err)
 			}
 			logger.Info("using config from stdin")
 		} else {
 			config, err = os.ReadFile(configFile)
 			if err != nil {
-				return nil, "", fmt.Errorf("reading config from file: %v", err)
+				return nil, "", "", fmt.Errorf("reading config from file: %v", err)
 			}
 			logger.Info("using config from file", zap.String("file", configFile))
 		}
@@ -179,7 +184,7 @@ func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([
 				cfgAdapter = nil
 			} else if err != nil {
 				// default Caddyfile exists, but error reading it
-				return nil, "", fmt.Errorf("reading default Caddyfile: %v", err)
+				return nil, "", "", fmt.Errorf("reading default Caddyfile: %v", err)
 			} else {
 				// success reading default Caddyfile
 				configFile = "Caddyfile"
@@ -191,14 +196,14 @@ func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([
 	if yes, err := isCaddyfile(configFile, adapterName); yes {
 		adapterName = "caddyfile"
 	} else if err != nil {
-		return nil, "", err
+		return nil, "", "", err
 	}
 
 	// load config adapter
 	if adapterName != "" {
 		cfgAdapter = caddyconfig.GetAdapter(adapterName)
 		if cfgAdapter == nil {
-			return nil, "", fmt.Errorf("unrecognized config adapter: %s", adapterName)
+			return nil, "", "", fmt.Errorf("unrecognized config adapter: %s", adapterName)
 		}
 	}
 
@@ -208,7 +213,7 @@ func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([
 			"filename": configFile,
 		})
 		if err != nil {
-			return nil, "", fmt.Errorf("adapting config using %s: %v", adapterName, err)
+			return nil, "", "", fmt.Errorf("adapting config using %s: %v", adapterName, err)
 		}
 		logger.Info("adapted config to JSON", zap.String("adapter", adapterName))
 		for _, warn := range warnings {
@@ -226,11 +231,11 @@ func loadConfigWithLogger(logger *zap.Logger, configFile, adapterName string) ([
 		// validate that the config is at least valid JSON
 		err = json.Unmarshal(config, new(any))
 		if err != nil {
-			return nil, "", fmt.Errorf("config is not valid JSON: %v; did you mean to use a config adapter (the --adapter flag)?", err)
+			return nil, "", "", fmt.Errorf("config is not valid JSON: %v; did you mean to use a config adapter (the --adapter flag)?", err)
 		}
 	}
 
-	return config, configFile, nil
+	return config, configFile, adapterName, nil
 }
 
 // watchConfigFile watches the config file at filename for changes
@@ -256,7 +261,7 @@ func watchConfigFile(filename, adapterName string) {
 	}
 
 	// get current config
-	lastCfg, _, err := loadConfigWithLogger(nil, filename, adapterName)
+	lastCfg, _, _, err := loadConfigWithLogger(nil, filename, adapterName)
 	if err != nil {
 		logger().Error("unable to load latest config", zap.Error(err))
 		return
@@ -268,7 +273,7 @@ func watchConfigFile(filename, adapterName string) {
 	//nolint:staticcheck
 	for range time.Tick(1 * time.Second) {
 		// get current config
-		newCfg, _, err := loadConfigWithLogger(nil, filename, adapterName)
+		newCfg, _, _, err := loadConfigWithLogger(nil, filename, adapterName)
 		if err != nil {
 			logger().Error("unable to load latest config", zap.Error(err))
 			return

cmd/packagesfuncs.go

@@ -62,7 +62,7 @@ func splitModule(arg string) (module, version string, err error) {
 		err = fmt.Errorf("module name is required")
 	}
 
-	return
+	return module, version, err
 }
 
 func cmdAddPackage(fl Flags) (int, error) {
@@ -217,7 +217,7 @@ func getModules() (standard, nonstandard, unknown []moduleInfo, err error) {
 	bi, ok := debug.ReadBuildInfo()
 	if !ok {
 		err = fmt.Errorf("no build info")
-		return
+		return standard, nonstandard, unknown, err
 	}
 
 	for _, modID := range caddy.Modules() {
@@ -260,7 +260,7 @@ func getModules() (standard, nonstandard, unknown []moduleInfo, err error) {
 			nonstandard = append(nonstandard, caddyModGoMod)
 		}
 	}
-	return
+	return standard, nonstandard, unknown, err
 }
 
 func listModules(path string) error {

cmd/storagefuncs.go

@@ -36,7 +36,7 @@ type storVal struct {
 // determineStorage returns the top-level storage module from the given config.
 // It may return nil even if no error.
 func determineStorage(configFile string, configAdapter string) (*storVal, error) {
-	cfg, _, err := LoadConfig(configFile, configAdapter)
+	cfg, _, _, err := LoadConfig(configFile, configAdapter)
 	if err != nil {
 		return nil, err
 	}

context.go

@@ -21,12 +21,14 @@ import (
 	"log"
 	"log/slog"
 	"reflect"
+	"sync"
 
 	"github.com/caddyserver/certmagic"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/collectors"
 	"go.uber.org/zap"
 	"go.uber.org/zap/exp/zapslog"
+	"go.uber.org/zap/zapcore"
 
 	"github.com/caddyserver/caddy/v2/internal/filesystems"
 )
@@ -583,24 +585,57 @@ func (ctx Context) Logger(module ...Module) *zap.Logger {
 	return ctx.cfg.Logging.Logger(mod)
 }
 
+type slogHandlerFactory func(handler slog.Handler, core zapcore.Core, moduleID string) slog.Handler
+
+var (
+	slogHandlerFactories   []slogHandlerFactory
+	slogHandlerFactoriesMu sync.RWMutex
+)
+
+// RegisterSlogHandlerFactory allows modules to register custom log/slog.Handler,
+// for instance, to add contextual data to the logs.
+func RegisterSlogHandlerFactory(factory slogHandlerFactory) {
+	slogHandlerFactoriesMu.Lock()
+	slogHandlerFactories = append(slogHandlerFactories, factory)
+	slogHandlerFactoriesMu.Unlock()
+}
+
 // Slogger returns a slog logger that is intended for use by
 // the most recent module associated with the context.
 func (ctx Context) Slogger() *slog.Logger {
+	var (
+		handler  slog.Handler
+		core     zapcore.Core
+		moduleID string
+	)
 	if ctx.cfg == nil {
 		// often the case in tests; just use a dev logger
 		l, err := zap.NewDevelopment()
 		if err != nil {
 			panic("config missing, unable to create dev logger: " + err.Error())
 		}
-		return slog.New(zapslog.NewHandler(l.Core()))
+
+		core = l.Core()
+		handler = zapslog.NewHandler(core)
+	} else {
+		mod := ctx.Module()
+		if mod == nil {
+			core = Log().Core()
+			handler = zapslog.NewHandler(core)
+		} else {
+			moduleID = string(mod.CaddyModule().ID)
+			core = ctx.cfg.Logging.Logger(mod).Core()
+			handler = zapslog.NewHandler(core, zapslog.WithName(moduleID))
+		}
 	}
-	mod := ctx.Module()
-	if mod == nil {
-		return slog.New(zapslog.NewHandler(Log().Core()))
+
+	slogHandlerFactoriesMu.RLock()
+	for _, f := range slogHandlerFactories {
+		handler = f(handler, core, moduleID)
 	}
-	return slog.New(zapslog.NewHandler(ctx.cfg.Logging.Logger(mod).Core(),
-		zapslog.WithName(string(mod.CaddyModule().ID)),
-	))
+	slogHandlerFactoriesMu.RUnlock()
+
+	return slog.New(handler)
 }
 
 // Modules returns the lineage of modules that this context provisioned,

go.mod

@@ -4,7 +4,8 @@ go 1.25
 
 require (
 	github.com/BurntSushi/toml v1.5.0
-	github.com/KimMachineGun/automemlimit v0.7.4
+	github.com/DeRuina/timberjack v1.3.9
+	github.com/KimMachineGun/automemlimit v0.7.5
 	github.com/Masterminds/sprig/v3 v3.3.0
 	github.com/alecthomas/chroma/v2 v2.20.0
 	github.com/aryann/difflib v0.0.0-20210328193216-ff5ff6dc229b
@@ -15,43 +16,42 @@ require (
 	github.com/go-chi/chi/v5 v5.2.3
 	github.com/google/cel-go v0.26.1
 	github.com/google/uuid v1.6.0
-	github.com/klauspost/compress v1.18.0
+	github.com/klauspost/compress v1.18.1
 	github.com/klauspost/cpuid/v2 v2.3.0
-	github.com/mholt/acmez/v3 v3.1.3
-	github.com/prometheus/client_golang v1.23.0
-	github.com/quic-go/quic-go v0.54.0
+	github.com/mholt/acmez/v3 v3.1.4
+	github.com/prometheus/client_golang v1.23.2
+	github.com/quic-go/quic-go v0.57.0
 	github.com/smallstep/certificates v0.28.4
 	github.com/smallstep/nosql v0.7.0
 	github.com/smallstep/truststore v0.13.0
 	github.com/spf13/cobra v1.10.1
-	github.com/spf13/pflag v1.0.9
+	github.com/spf13/pflag v1.0.10
 	github.com/stretchr/testify v1.11.1
 	github.com/tailscale/tscert v0.0.0-20240608151842-d3f834017e53
 	github.com/yuin/goldmark v1.7.13
 	github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
+	go.opentelemetry.io/contrib/exporters/autoexport v0.63.0
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.63.0
 	go.opentelemetry.io/contrib/propagators/autoprop v0.63.0
 	go.opentelemetry.io/otel v1.38.0
-	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0
 	go.opentelemetry.io/otel/sdk v1.38.0
 	go.uber.org/automaxprocs v1.6.0
 	go.uber.org/zap v1.27.0
 	go.uber.org/zap/exp v0.3.0
-	golang.org/x/crypto v0.41.0
-	golang.org/x/crypto/x509roots/fallback v0.0.0-20250305170421-49bf5b80c810
-	golang.org/x/net v0.43.0
-	golang.org/x/sync v0.16.0
-	golang.org/x/term v0.34.0
-	golang.org/x/time v0.12.0
-	gopkg.in/natefinch/lumberjack.v2 v2.2.1
+	golang.org/x/crypto v0.45.0
+	golang.org/x/crypto/x509roots/fallback v0.0.0-20250927194341-2beaa59a3c99
+	golang.org/x/net v0.47.0
+	golang.org/x/sync v0.18.0
+	golang.org/x/term v0.37.0
+	golang.org/x/time v0.14.0
 	gopkg.in/yaml.v3 v3.0.1
 )
 
 require (
 	cel.dev/expr v0.24.0 // indirect
-	cloud.google.com/go/auth v0.16.4 // indirect
+	cloud.google.com/go/auth v0.17.0 // indirect
 	cloud.google.com/go/auth/oauth2adapt v0.2.8 // indirect
-	cloud.google.com/go/compute/metadata v0.8.0 // indirect
+	cloud.google.com/go/compute/metadata v0.9.0 // indirect
 	dario.cat/mergo v1.0.1 // indirect
 	github.com/Microsoft/go-winio v0.6.0 // indirect
 	github.com/antlr4-go/antlr/v4 v4.13.0 // indirect
@@ -59,16 +59,16 @@ require (
 	github.com/cenkalti/backoff/v5 v5.0.3 // indirect
 	github.com/coreos/go-oidc/v3 v3.14.1 // indirect
 	github.com/davecgh/go-spew v1.1.1 // indirect
-	github.com/francoispqt/gojay v1.2.13 // indirect
 	github.com/fxamacker/cbor/v2 v2.8.0 // indirect
 	github.com/go-jose/go-jose/v3 v3.0.4 // indirect
-	github.com/go-jose/go-jose/v4 v4.1.1 // indirect
+	github.com/go-jose/go-jose/v4 v4.1.2 // indirect
 	github.com/google/certificate-transparency-go v1.1.8-0.20240110162603-74a5dd331745 // indirect
-	github.com/google/go-tpm v0.9.5 // indirect
+	github.com/google/go-tpm v0.9.6 // indirect
 	github.com/google/go-tspi v0.3.0 // indirect
 	github.com/google/s2a-go v0.1.9 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.6 // indirect
 	github.com/googleapis/gax-go/v2 v2.15.0 // indirect
+	github.com/grafana/regexp v0.0.0-20240518133315-a468a5bfb3bc // indirect
 	github.com/grpc-ecosystem/grpc-gateway/v2 v2.27.2 // indirect
 	github.com/jackc/pgx/v5 v5.6.0 // indirect
 	github.com/jackc/puddle/v2 v2.2.1 // indirect
@@ -76,7 +76,8 @@ require (
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pbnjay/memory v0.0.0-20210728143218-7b4eea64cf58 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/quic-go/qpack v0.5.1 // indirect
+	github.com/prometheus/otlptranslator v0.0.2 // indirect
+	github.com/quic-go/qpack v0.6.0 // indirect
 	github.com/smallstep/cli-utils v0.12.1 // indirect
 	github.com/smallstep/go-attestation v0.4.4-0.20241119153605-2306d5b464ca // indirect
 	github.com/smallstep/linkedca v0.23.0 // indirect
@@ -85,16 +86,30 @@ require (
 	github.com/x448/float16 v0.8.4 // indirect
 	github.com/zeebo/blake3 v0.2.4 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
+	go.opentelemetry.io/contrib/bridges/prometheus v0.63.0 // indirect
 	go.opentelemetry.io/contrib/propagators/aws v1.38.0 // indirect
 	go.opentelemetry.io/contrib/propagators/b3 v1.38.0 // indirect
 	go.opentelemetry.io/contrib/propagators/jaeger v1.38.0 // indirect
 	go.opentelemetry.io/contrib/propagators/ot v1.38.0 // indirect
-	go.uber.org/mock v0.5.2 // indirect
-	golang.org/x/exp v0.0.0-20250620022241-b7579e27df2b // indirect
-	golang.org/x/oauth2 v0.30.0 // indirect
-	google.golang.org/api v0.247.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploggrpc v0.14.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlplog/otlploghttp v0.14.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/prometheus v0.60.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutlog v0.14.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.38.0 // indirect
+	go.opentelemetry.io/otel/exporters/stdout/stdouttrace v1.38.0 // indirect
+	go.opentelemetry.io/otel/log v0.14.0 // indirect
+	go.opentelemetry.io/otel/sdk/log v0.14.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.38.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
+	golang.org/x/exp v0.0.0-20250813145105-42675adae3e6 // indirect
+	golang.org/x/oauth2 v0.32.0 // indirect
+	google.golang.org/api v0.254.0 // indirect
 	google.golang.org/genproto/googleapis/api v0.0.0-20250825161204-c5933d9347a5 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20250825161204-c5933d9347a5 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20251022142026-3a174f9686a8 // indirect
 	google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 // indirect
 )
 
@@ -135,14 +150,14 @@ require (
 	github.com/pires/go-proxyproto v0.8.1
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/prometheus/client_model v0.6.2
-	github.com/prometheus/common v0.65.0 // indirect
-	github.com/prometheus/procfs v0.16.1 // indirect
+	github.com/prometheus/common v0.67.1 // indirect
+	github.com/prometheus/procfs v0.17.0 // indirect
 	github.com/rs/xid v1.6.0 // indirect
 	github.com/russross/blackfriday/v2 v2.1.0 // indirect
 	github.com/shopspring/decimal v1.4.0 // indirect
 	github.com/shurcooL/sanitized_anchor_name v1.0.0 // indirect
 	github.com/sirupsen/logrus v1.9.3 // indirect
-	github.com/slackhq/nebula v1.9.5 // indirect
+	github.com/slackhq/nebula v1.9.7 // indirect
 	github.com/spf13/cast v1.7.0 // indirect
 	github.com/stoewer/go-strcase v1.2.0 // indirect
 	github.com/urfave/cli v1.22.17 // indirect
@@ -151,13 +166,13 @@ require (
 	go.opentelemetry.io/otel/metric v1.38.0 // indirect
 	go.opentelemetry.io/otel/trace v1.38.0
 	go.opentelemetry.io/proto/otlp v1.7.1 // indirect
-	go.step.sm/crypto v0.70.0
+	go.step.sm/crypto v0.74.0
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/mod v0.26.0 // indirect
-	golang.org/x/sys v0.35.0
-	golang.org/x/text v0.28.0 // indirect
-	golang.org/x/tools v0.35.0 // indirect
-	google.golang.org/grpc v1.75.0 // indirect
-	google.golang.org/protobuf v1.36.8 // indirect
+	golang.org/x/mod v0.29.0 // indirect
+	golang.org/x/sys v0.38.0
+	golang.org/x/text v0.31.0 // indirect
+	golang.org/x/tools v0.38.0 // indirect
+	google.golang.org/grpc v1.76.0 // indirect
+	google.golang.org/protobuf v1.36.10 // indirect
 	howett.net/plist v1.0.0 // indirect
 )

go.sum

@@ -1,39 +1,32 @@
 cel.dev/expr v0.24.0 h1:56OvJKSH3hDGL0ml5uSxZmz3/3Pq4tJ+fb1unVLAFcY=
 cel.dev/expr v0.24.0/go.mod h1:hLPLo1W4QUmuYdA72RBX06QTs6MXw941piREPl3Yfiw=
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.31.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.37.0/go.mod h1:TS1dMSSfndXH133OKGwekG838Om/cQT0BUHV3HcBgoo=
 cloud.google.com/go v0.120.0 h1:wc6bgG9DHyKqF5/vQvX1CiZrtHnxJjBlKUyF9nP6meA=
 cloud.google.com/go v0.120.0/go.mod h1:/beW32s8/pGRuj4IILWQNd4uuebeT4dkOhKmkfit64Q=
-cloud.google.com/go/auth v0.16.4 h1:fXOAIQmkApVvcIn7Pc2+5J8QTMVbUGLscnSVNl11su8=
-cloud.google.com/go/auth v0.16.4/go.mod h1:j10ncYwjX/g3cdX7GpEzsdM+d+ZNsXAbb6qXA7p1Y5M=
+cloud.google.com/go/auth v0.17.0 h1:74yCm7hCj2rUyyAocqnFzsAYXgJhrG26XCFimrc/Kz4=
+cloud.google.com/go/auth v0.17.0/go.mod h1:6wv/t5/6rOPAX4fJiRjKkJCvswLwdet7G8+UGXt7nCQ=
 cloud.google.com/go/auth/oauth2adapt v0.2.8 h1:keo8NaayQZ6wimpNSmW5OPc283g65QNIiLpZnkHRbnc=
 cloud.google.com/go/auth/oauth2adapt v0.2.8/go.mod h1:XQ9y31RkqZCcwJWNSx2Xvric3RrU88hAYYbjDWYDL+c=
-cloud.google.com/go/compute/metadata v0.8.0 h1:HxMRIbao8w17ZX6wBnjhcDkW6lTFpgcaobyVfZWqRLA=
-cloud.google.com/go/compute/metadata v0.8.0/go.mod h1:sYOGTp851OV9bOFJ9CH7elVvyzopvWQFNNghtDQ/Biw=
+cloud.google.com/go/compute/metadata v0.9.0 h1:pDUj4QMoPejqq20dK0Pg2N4yG9zIkYGdBtwLoEkH9Zs=
+cloud.google.com/go/compute/metadata v0.9.0/go.mod h1:E0bWwX5wTnLPedCKqk3pJmVgCBSM6qQI1yTBdEb3C10=
 cloud.google.com/go/iam v1.5.2 h1:qgFRAGEmd8z6dJ/qyEchAuL9jpswyODjA2lS+w234g8=
 cloud.google.com/go/iam v1.5.2/go.mod h1:SE1vg0N81zQqLzQEwxL2WI6yhetBdbNQuTvIKCSkUHE=
-cloud.google.com/go/kms v1.22.0 h1:dBRIj7+GDeeEvatJeTB19oYZNV0aj6wEqSIT/7gLqtk=
-cloud.google.com/go/kms v1.22.0/go.mod h1:U7mf8Sva5jpOb4bxYZdtw/9zsbIjrklYwPcvMk34AL8=
+cloud.google.com/go/kms v1.23.2 h1:4IYDQL5hG4L+HzJBhzejUySoUOheh3Lk5YT4PCyyW6k=
+cloud.google.com/go/kms v1.23.2/go.mod h1:rZ5kK0I7Kn9W4erhYVoIRPtpizjunlrfU4fUkumUp8g=
 cloud.google.com/go/longrunning v0.6.7 h1:IGtfDWHhQCgCjwQjV9iiLnUta9LBCo8R9QmAFsS/PrE=
 cloud.google.com/go/longrunning v0.6.7/go.mod h1:EAFV3IZAKmM56TyiE6VAP3VoTzhZzySwI/YI1s/nRsY=
 dario.cat/mergo v1.0.1 h1:Ra4+bf83h2ztPIQYNP99R6m+Y7KfnARDfID+a+vLl4s=
 dario.cat/mergo v1.0.1/go.mod h1:uNxQE+84aUszobStD9th8a29P2fMDhsBdgRYvZOxGmk=
-dmitri.shuralyov.com/app/changes v0.0.0-20180602232624-0a106ad413e3/go.mod h1:Yl+fi1br7+Rr3LqpNJf1/uxUdtRUV+Tnj0o93V2B9MU=
-dmitri.shuralyov.com/html/belt v0.0.0-20180602232347-f7d459c86be0/go.mod h1:JLBrvjyP0v+ecvNYvCpyZgu5/xkfAUhi6wJj28eUfSU=
-dmitri.shuralyov.com/service/change v0.0.0-20181023043359-a85b471d5412/go.mod h1:a1inKt/atXimZ4Mv927x+r7UpyzRUf4emIoiiSC2TN4=
-dmitri.shuralyov.com/state v0.0.0-20180228185332-28bcc343414c/go.mod h1:0PRwlb0D6DFvNNtx+9ybjezNCa8XF0xaYcETyp6rHWU=
 filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
 filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
-git.apache.org/thrift.git v0.0.0-20180902110319-2566ecd5d999/go.mod h1:fPE2ZNJGynbRyZ4dJvy6G277gSllfV2HJqblrnkyeyg=
 github.com/AndreasBriese/bbloom v0.0.0-20190825152654-46b345b51c96 h1:cTp8I5+VIoKjsnZuH8vjyaysT/ses3EvZeaV/1UkF2M=
 github.com/AndreasBriese/bbloom v0.0.0-20190825152654-46b345b51c96/go.mod h1:bOvUY6CB00SOBii9/FifXqc0awNKxLFCL/+pkDPuyl8=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=
 github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=
-github.com/KimMachineGun/automemlimit v0.7.4 h1:UY7QYOIfrr3wjjOAqahFmC3IaQCLWvur9nmfIn6LnWk=
-github.com/KimMachineGun/automemlimit v0.7.4/go.mod h1:QZxpHaGOQoYvFhv/r4u3U0JTC2ZcOwbSr11UZF46UBM=
+github.com/DeRuina/timberjack v1.3.9 h1:6UXZ1I7ExPGTX/1UNYawR58LlOJUHKBPiYC7WQ91eBo=
+github.com/DeRuina/timberjack v1.3.9/go.mod h1:RLoeQrwrCGIEF8gO5nV5b/gMD0QIy7bzQhBUgpp1EqE=
+github.com/KimMachineGun/automemlimit v0.7.5 h1:RkbaC0MwhjL1ZuBKunGDjE/ggwAX43DwZrJqVwyveTk=
+github.com/KimMachineGun/automemlimit v0.7.5/go.mod h1:QZxpHaGOQoYvFhv/r4u3U0JTC2ZcOwbSr11UZF46UBM=
 github.com/Masterminds/goutils v1.1.1 h1:5nUrii3FMTL5diU80unEVvNevw1nH4+ZV4DSLVJLSYI=
 github.com/Masterminds/goutils v1.1.1/go.mod h1:8cTjp+g8YejhMuvIA5y2vz3BpJxksy863GQaJW2MFNU=
 github.com/Masterminds/semver/v3 v3.3.0 h1:B8LGeaivUe71a5qox1ICM/JLl0NqZSW5CHyL+hmvYS0=
@@ -52,45 +45,41 @@ github.com/alecthomas/chroma/v2 v2.20.0/go.mod h1:e7tViK0xh/Nf4BYHl00ycY6rV7b8iX
 github.com/alecthomas/repr v0.0.0-20220113201626-b1b626ac65ae/go.mod h1:2kn6fqh/zIyPLmm3ugklbEi5hg5wS435eygvNfaDQL8=
 github.com/alecthomas/repr v0.5.1 h1:E3G4t2QbHTSNpPKBgMTln5KLkZHLOcU7r37J4pXBuIg=
 github.com/alecthomas/repr v0.5.1/go.mod h1:Fr0507jx4eOXV7AlPV6AVZLYrLIuIeSOWtW57eE/O/4=
-github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
 github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
 github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
 github.com/aryann/difflib v0.0.0-20210328193216-ff5ff6dc229b h1:uUXgbcPDK3KpW29o4iy7GtuappbWT0l5NaMo9H9pJDw=
 github.com/aryann/difflib v0.0.0-20210328193216-ff5ff6dc229b/go.mod h1:DAHtR1m6lCRdSC2Tm3DSWRPvIPr6xNKyeHdqDQSQT+A=
-github.com/aws/aws-sdk-go-v2 v1.38.0 h1:UCRQ5mlqcFk9HJDIqENSLR3wiG1VTWlyUfLDEvY7RxU=
-github.com/aws/aws-sdk-go-v2 v1.38.0/go.mod h1:9Q0OoGQoboYIAJyslFyF1f5K1Ryddop8gqMhWx/n4Wg=
-github.com/aws/aws-sdk-go-v2/config v1.31.0 h1:9yH0xiY5fUnVNLRWO0AtayqwU1ndriZdN78LlhruJR4=
-github.com/aws/aws-sdk-go-v2/config v1.31.0/go.mod h1:VeV3K72nXnhbe4EuxxhzsDc/ByrCSlZwUnWH52Nde/I=
-github.com/aws/aws-sdk-go-v2/credentials v1.18.4 h1:IPd0Algf1b+Qy9BcDp0sCUcIWdCQPSzDoMK3a8pcbUM=
-github.com/aws/aws-sdk-go-v2/credentials v1.18.4/go.mod h1:nwg78FjH2qvsRM1EVZlX9WuGUJOL5od+0qvm0adEzHk=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.3 h1:GicIdnekoJsjq9wqnvyi2elW6CGMSYKhdozE7/Svh78=
-github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.18.3/go.mod h1:R7BIi6WNC5mc1kfRM7XM/VHC3uRWkjc396sfabq4iOo=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.3 h1:o9RnO+YZ4X+kt5Z7Nvcishlz0nksIt2PIzDglLMP0vA=
-github.com/aws/aws-sdk-go-v2/internal/configsources v1.4.3/go.mod h1:+6aLJzOG1fvMOyzIySYjOFjcguGvVRL68R+uoRencN4=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.3 h1:joyyUFhiTQQmVK6ImzNU9TQSNRNeD9kOklqTzyk5v6s=
-github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.7.3/go.mod h1:+vNIyZQP3b3B1tSLI0lxvrU9cfM7gpdRXMFfm67ZcPc=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.8.3 h1:bIqFDwgGXXN1Kpp99pDOdKMTTb5d2KyU5X/BZxjOkRo=
-github.com/aws/aws-sdk-go-v2/internal/ini v1.8.3/go.mod h1:H5O/EsxDWyU+LP/V8i5sm8cxoZgc2fdNR9bxlOFrQTo=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.0 h1:6+lZi2JeGKtCraAj1rpoZfKqnQ9SptseRZioejfUOLM=
-github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.13.0/go.mod h1:eb3gfbVIxIoGgJsi9pGne19dhCBpK6opTYpQqAmdy44=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.3 h1:ieRzyHXypu5ByllM7Sp4hC5f/1Fy5wqxqY0yB85hC7s=
-github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.13.3/go.mod h1:O5ROz8jHiOAKAwx179v+7sHMhfobFVi6nZt8DEyiYoM=
-github.com/aws/aws-sdk-go-v2/service/kms v1.44.0 h1:Z95XCqqSnwXr0AY7PgsiOUBhUG2GoDM5getw6RfD1Lg=
-github.com/aws/aws-sdk-go-v2/service/kms v1.44.0/go.mod h1:DqcSngL7jJeU1fOzh5Ll5rSvX/MlMV6OZlE4mVdFAQc=
-github.com/aws/aws-sdk-go-v2/service/sso v1.28.0 h1:Mc/MKBf2m4VynyJkABoVEN+QzkfLqGj0aiJuEe7cMeM=
-github.com/aws/aws-sdk-go-v2/service/sso v1.28.0/go.mod h1:iS5OmxEcN4QIPXARGhavH7S8kETNL11kym6jhoS7IUQ=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.33.0 h1:6csaS/aJmqZQbKhi1EyEMM7yBW653Wy/B9hnBofW+sw=
-github.com/aws/aws-sdk-go-v2/service/ssooidc v1.33.0/go.mod h1:59qHWaY5B+Rs7HGTuVGaC32m0rdpQ68N8QCN3khYiqs=
-github.com/aws/aws-sdk-go-v2/service/sts v1.37.0 h1:MG9VFW43M4A8BYeAfaJJZWrroinxeTi2r3+SnmLQfSA=
-github.com/aws/aws-sdk-go-v2/service/sts v1.37.0/go.mod h1:JdeBDPgpJfuS6rU/hNglmOigKhyEZtBmbraLE4GK1J8=
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@@ -120,7 +108,6 @@ github.com/coreos/go-etcd v2.0.0+incompatible/go.mod h1:Jez6KQU2B/sWsbdaef3ED8Nz
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@@ -148,23 +135,19 @@ github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkp
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 github.com/smallstep/certificates v0.28.4 h1:JTU6/A5Xes6m+OsR6fw1RACSA362vJc9SOFVG7poBEw=
@@ -384,8 +313,6 @@ github.com/smallstep/scep v0.0.0-20240926084937-8cf1ca453101 h1:LyZqn24/ZiVg8v9H
 github.com/smallstep/scep v0.0.0-20240926084937-8cf1ca453101/go.mod h1:EuKQjYGQwhUa1mgD21zxIgOgUYLsqikJmvxNscxpS/Y=
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@@ -398,8 +325,9 @@ github.com/spf13/cobra v1.10.1 h1:lJeBwCfmrnXthfAupyUTzJ/J4Nc1RsHC/mSRU2dll/s=
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@@ -420,12 +348,9 @@ github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu
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@@ -443,9 +368,12 @@ github.com/zeebo/pcg v1.0.1 h1:lyqfGeWiv4ahac6ttHs+I5hwtH/+1mrhlCtVNQM2kHo=
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-go.opencensus.io v0.18.0/go.mod h1:vKdFvxhtzZ9onBp9VKHK8z/sRpBMnKAsufL7wlDrCOA=
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+go.opentelemetry.io/contrib/bridges/prometheus v0.63.0 h1:/Rij/t18Y7rUayNg7Id6rPrEnHgorxYabm2E6wUdPP4=
+go.opentelemetry.io/contrib/bridges/prometheus v0.63.0/go.mod h1:AdyDPn6pkbkt2w01n3BubRVk7xAsCRq1Yg1mpfyA/0E=
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@@ -462,71 +390,81 @@ go.opentelemetry.io/contrib/propagators/ot v1.38.0 h1:k4gSyyohaDXI8F9BDXYC3uO2vr
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@@ -535,19 +473,10 @@ golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
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-golang.org/x/net v0.43.0 h1:lat02VYK2j4aLzMzecihNvTlJNQUq316m2Mr9rnM6YE=
-golang.org/x/net v0.43.0/go.mod h1:vhO1fvI4dGsIjh73sWfUVjj3N7CA9WkKJNQm2svM6Jg=
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-golang.org/x/oauth2 v0.30.0/go.mod h1:B++QgG3ZKulg6sRPGD/mqlHQs5rB3Ml9erfeDY7xKlU=
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@@ -556,15 +485,11 @@ golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
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@@ -582,8 +507,8 @@ golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
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-golang.org/x/sys v0.35.0 h1:vz1N37gP5bs89s7He8XuIYXpyY0+QlsKmzipCbUtyxI=
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+golang.org/x/sys v0.38.0 h1:3yZWxaJjBmCWXqhN1qh02AkOnCQ1poK6oF+a7xWL6Gc=
+golang.org/x/sys v0.38.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
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@@ -594,10 +519,9 @@ golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
 golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
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+golang.org/x/term v0.37.0/go.mod h1:5pB4lxRNYYVZuTLmy8oR2BH8dflOR+IbTYFD8fi3254=
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-golang.org/x/text v0.3.1-0.20180807135948-17ff2d5776d2/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
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@@ -607,76 +531,44 @@ golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
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-golang.org/x/text v0.28.0/go.mod h1:U8nCwOR8jO/marOQ0QbDiOngZVEBB7MAiitBuMjXiNU=
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-golang.org/x/time v0.0.0-20181108054448-85acf8d2951c/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
-golang.org/x/time v0.12.0 h1:ScB/8o8olJvc+CQPWrK3fPZNfh7qgwCrY0zJmoEQLSE=
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 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
 golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
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-golang.org/x/tools v0.35.0/go.mod h1:NKdj5HkL/73byiZSJjqJgKn3ep7KjFkBOkR/Hps3VPw=
+golang.org/x/tools v0.38.0 h1:Hx2Xv8hISq8Lm16jvBZ2VQf+RLmbd7wVUsALibYI/IQ=
+golang.org/x/tools v0.38.0/go.mod h1:yEsQ/d/YK8cjh0L6rZlY8tgtlKiBNTL14pGDJPJpYQs=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/api v0.0.0-20180910000450-7ca32eb868bf/go.mod h1:4mhQ8q/RsB7i+udVvVy5NUi08OU8ZlA0gRVgrF7VFY0=
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 google.golang.org/genproto v0.0.0-20250603155806-513f23925822/go.mod h1:HubltRL7rMh0LfnQPkMH4NPDFEWp0jw3vixw7jEM53s=
 google.golang.org/genproto/googleapis/api v0.0.0-20250825161204-c5933d9347a5 h1:BIRfGDEjiHRrk0QKZe3Xv2ieMhtgRGeLcZQ0mIVn4EY=
 google.golang.org/genproto/googleapis/api v0.0.0-20250825161204-c5933d9347a5/go.mod h1:j3QtIyytwqGr1JUDtYXwtMXWPKsEa5LtzIFN1Wn5WvE=
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 google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1 h1:F29+wU6Ee6qgu9TddPgooOdaqsxTMunOoj8KA5yuS5A=
 google.golang.org/grpc/cmd/protoc-gen-go-grpc v1.5.1/go.mod h1:5KF+wpkbTSbGcR9zteSqZV6fqFOWBl4Yde8En8MryZA=
-google.golang.org/protobuf v1.36.8 h1:xHScyCOEuuwZEc6UtSOvPbAT4zRh0xcNRYekJwfqyMc=
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 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
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-grpc.go4.org v0.0.0-20170609214715-11d0a25b4919/go.mod h1:77eQGdRu53HpSqPFJFmuJdjuHRquDANNeA4x7B8WQ9o=
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-honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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 howett.net/plist v1.0.0/go.mod h1:lqaXoTrLY4hg8tnEzNru53gicrbv7rrk+2xJA/7hw9g=
-sourcegraph.com/sourcegraph/go-diff v0.5.0/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
-sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=

listen.go

@@ -261,14 +261,14 @@ func (fcpc *fakeClosePacketConn) ReadFrom(p []byte) (n int, addr net.Addr, err e
 		if atomic.LoadInt32(&fcpc.closed) == 1 {
 			if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
 				if err = fcpc.SetReadDeadline(time.Time{}); err != nil {
-					return
+					return n, addr, err
 				}
 			}
 		}
-		return
+		return n, addr, err
 	}
 
-	return
+	return n, addr, err
 }
 
 // Close won't close the underlying socket unless there is no more reference, then listenerPool will close it.

listeners.go

@@ -31,13 +31,17 @@ import (
 
 	"github.com/quic-go/quic-go"
 	"github.com/quic-go/quic-go/http3"
-	"github.com/quic-go/quic-go/qlog"
+	h3qlog "github.com/quic-go/quic-go/http3/qlog"
 	"go.uber.org/zap"
 	"golang.org/x/time/rate"
 
 	"github.com/caddyserver/caddy/v2/internal"
 )
 
+// listenFdsStart is the first file descriptor number for systemd socket activation.
+// File descriptors 0, 1, 2 are reserved for stdin, stdout, stderr.
+const listenFdsStart = 3
+
 // NetworkAddress represents one or more network addresses.
 // It contains the individual components for a parsed network
 // address of the form accepted by ParseNetworkAddress().
@@ -305,6 +309,64 @@ func IsFdNetwork(netw string) bool {
 	return strings.HasPrefix(netw, "fd")
 }
 
+// getFdByName returns the file descriptor number for the given
+// socket name from systemd's LISTEN_FDNAMES environment variable.
+// Socket names are provided by systemd via socket activation.
+//
+// The name can optionally include an index to handle multiple sockets
+// with the same name: "web:0" for first, "web:1" for second, etc.
+// If no index is specified, defaults to index 0 (first occurrence).
+func getFdByName(nameWithIndex string) (int, error) {
+	if nameWithIndex == "" {
+		return 0, fmt.Errorf("socket name cannot be empty")
+	}
+
+	fdNamesStr := os.Getenv("LISTEN_FDNAMES")
+	if fdNamesStr == "" {
+		return 0, fmt.Errorf("LISTEN_FDNAMES environment variable not set")
+	}
+
+	// Parse name and optional index
+	parts := strings.Split(nameWithIndex, ":")
+	if len(parts) > 2 {
+		return 0, fmt.Errorf("invalid socket name format '%s': too many colons", nameWithIndex)
+	}
+
+	name := parts[0]
+	targetIndex := 0
+
+	if len(parts) > 1 {
+		var err error
+		targetIndex, err = strconv.Atoi(parts[1])
+		if err != nil {
+			return 0, fmt.Errorf("invalid socket index '%s': %v", parts[1], err)
+		}
+		if targetIndex < 0 {
+			return 0, fmt.Errorf("socket index cannot be negative: %d", targetIndex)
+		}
+	}
+
+	// Parse the socket names
+	names := strings.Split(fdNamesStr, ":")
+
+	// Find the Nth occurrence of the requested name
+	matchCount := 0
+	for i, fdName := range names {
+		if fdName == name {
+			if matchCount == targetIndex {
+				return listenFdsStart + i, nil
+			}
+			matchCount++
+		}
+	}
+
+	if matchCount == 0 {
+		return 0, fmt.Errorf("socket name '%s' not found in LISTEN_FDNAMES", name)
+	}
+
+	return 0, fmt.Errorf("socket name '%s' found %d times, but index %d requested", name, matchCount, targetIndex)
+}
+
 // ParseNetworkAddress parses addr into its individual
 // components. The input string is expected to be of
 // the form "network/host:port-range" where any part is
@@ -336,9 +398,27 @@ func ParseNetworkAddressWithDefaults(addr, defaultNetwork string, defaultPort ui
 		}, err
 	}
 	if IsFdNetwork(network) {
+		fdAddr := host
+
+		// Handle named socket activation (fdname/name, fdgramname/name)
+		if strings.HasPrefix(network, "fdname") || strings.HasPrefix(network, "fdgramname") {
+			fdNum, err := getFdByName(host)
+			if err != nil {
+				return NetworkAddress{}, fmt.Errorf("named socket activation: %v", err)
+			}
+			fdAddr = strconv.Itoa(fdNum)
+
+			// Normalize network to standard fd/fdgram
+			if strings.HasPrefix(network, "fdname") {
+				network = "fd"
+			} else {
+				network = "fdgram"
+			}
+		}
+
 		return NetworkAddress{
 			Network: network,
-			Host:    host,
+			Host:    fdAddr,
 		}, nil
 	}
 	var start, end uint64
@@ -382,7 +462,7 @@ func SplitNetworkAddress(a string) (network, host, port string, err error) {
 		a = afterSlash
 		if IsUnixNetwork(network) || IsFdNetwork(network) {
 			host = a
-			return
+			return network, host, port, err
 		}
 	}
 
@@ -402,7 +482,7 @@ func SplitNetworkAddress(a string) (network, host, port string, err error) {
 		err = errors.Join(firstErr, err)
 	}
 
-	return
+	return network, host, port, err
 }
 
 // JoinNetworkAddress combines network, host, and port into a single
@@ -467,7 +547,7 @@ func (na NetworkAddress) ListenQUIC(ctx context.Context, portOffset uint, config
 			http3.ConfigureTLSConfig(quicTlsConfig),
 			&quic.Config{
 				Allow0RTT: true,
-				Tracer:    qlog.DefaultConnectionTracer,
+				Tracer:    h3qlog.DefaultConnectionTracer,
 			},
 		)
 		if err != nil {

listeners_test.go

@@ -15,6 +15,7 @@
 package caddy
 
 import (
+	"os"
 	"reflect"
 	"testing"
 
@@ -652,3 +653,286 @@ func TestSplitUnixSocketPermissionsBits(t *testing.T) {
 		}
 	}
 }
+
+// TestGetFdByName tests the getFdByName function for systemd socket activation.
+func TestGetFdByName(t *testing.T) {
+	// Save original environment
+	originalFdNames := os.Getenv("LISTEN_FDNAMES")
+
+	// Restore environment after test
+	defer func() {
+		if originalFdNames != "" {
+			os.Setenv("LISTEN_FDNAMES", originalFdNames)
+		} else {
+			os.Unsetenv("LISTEN_FDNAMES")
+		}
+	}()
+
+	tests := []struct {
+		name        string
+		fdNames     string
+		socketName  string
+		expectedFd  int
+		expectError bool
+	}{
+		{
+			name:       "simple http socket",
+			fdNames:    "http",
+			socketName: "http",
+			expectedFd: 3,
+		},
+		{
+			name:       "multiple different sockets - first",
+			fdNames:    "http:https:dns",
+			socketName: "http",
+			expectedFd: 3,
+		},
+		{
+			name:       "multiple different sockets - second",
+			fdNames:    "http:https:dns",
+			socketName: "https",
+			expectedFd: 4,
+		},
+		{
+			name:       "multiple different sockets - third",
+			fdNames:    "http:https:dns",
+			socketName: "dns",
+			expectedFd: 5,
+		},
+		{
+			name:       "duplicate names - first occurrence (no index)",
+			fdNames:    "web:web:api",
+			socketName: "web",
+			expectedFd: 3,
+		},
+		{
+			name:       "duplicate names - first occurrence (explicit index 0)",
+			fdNames:    "web:web:api",
+			socketName: "web:0",
+			expectedFd: 3,
+		},
+		{
+			name:       "duplicate names - second occurrence (index 1)",
+			fdNames:    "web:web:api",
+			socketName: "web:1",
+			expectedFd: 4,
+		},
+		{
+			name:       "complex duplicates - first api",
+			fdNames:    "web:api:web:api:dns",
+			socketName: "api:0",
+			expectedFd: 4,
+		},
+		{
+			name:       "complex duplicates - second api",
+			fdNames:    "web:api:web:api:dns",
+			socketName: "api:1",
+			expectedFd: 6,
+		},
+		{
+			name:       "complex duplicates - first web",
+			fdNames:    "web:api:web:api:dns",
+			socketName: "web:0",
+			expectedFd: 3,
+		},
+		{
+			name:       "complex duplicates - second web",
+			fdNames:    "web:api:web:api:dns",
+			socketName: "web:1",
+			expectedFd: 5,
+		},
+		{
+			name:        "socket not found",
+			fdNames:     "http:https",
+			socketName:  "missing",
+			expectError: true,
+		},
+		{
+			name:        "empty socket name",
+			fdNames:     "http",
+			socketName:  "",
+			expectError: true,
+		},
+		{
+			name:        "missing LISTEN_FDNAMES",
+			fdNames:     "",
+			socketName:  "http",
+			expectError: true,
+		},
+		{
+			name:        "index out of range",
+			fdNames:     "web:web",
+			socketName:  "web:2",
+			expectError: true,
+		},
+		{
+			name:        "negative index",
+			fdNames:     "web",
+			socketName:  "web:-1",
+			expectError: true,
+		},
+		{
+			name:        "invalid index format",
+			fdNames:     "web",
+			socketName:  "web:abc",
+			expectError: true,
+		},
+		{
+			name:        "too many colons",
+			fdNames:     "web",
+			socketName:  "web:0:extra",
+			expectError: true,
+		},
+	}
+
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			// Set up environment
+			if tc.fdNames != "" {
+				os.Setenv("LISTEN_FDNAMES", tc.fdNames)
+			} else {
+				os.Unsetenv("LISTEN_FDNAMES")
+			}
+
+			// Test the function
+			fd, err := getFdByName(tc.socketName)
+
+			if tc.expectError {
+				if err == nil {
+					t.Errorf("Expected error but got none")
+				}
+			} else {
+				if err != nil {
+					t.Errorf("Expected no error but got: %v", err)
+				}
+				if fd != tc.expectedFd {
+					t.Errorf("Expected FD %d but got %d", tc.expectedFd, fd)
+				}
+			}
+		})
+	}
+}
+
+// TestParseNetworkAddressFdName tests parsing of fdname and fdgramname addresses.
+func TestParseNetworkAddressFdName(t *testing.T) {
+	// Save and restore environment
+	originalFdNames := os.Getenv("LISTEN_FDNAMES")
+	defer func() {
+		if originalFdNames != "" {
+			os.Setenv("LISTEN_FDNAMES", originalFdNames)
+		} else {
+			os.Unsetenv("LISTEN_FDNAMES")
+		}
+	}()
+
+	// Set up test environment
+	os.Setenv("LISTEN_FDNAMES", "http:https:dns")
+
+	tests := []struct {
+		input      string
+		expectAddr NetworkAddress
+		expectErr  bool
+	}{
+		{
+			input: "fdname/http",
+			expectAddr: NetworkAddress{
+				Network: "fd",
+				Host:    "3",
+			},
+		},
+		{
+			input: "fdname/https",
+			expectAddr: NetworkAddress{
+				Network: "fd",
+				Host:    "4",
+			},
+		},
+		{
+			input: "fdname/dns",
+			expectAddr: NetworkAddress{
+				Network: "fd",
+				Host:    "5",
+			},
+		},
+		{
+			input: "fdname/http:0",
+			expectAddr: NetworkAddress{
+				Network: "fd",
+				Host:    "3",
+			},
+		},
+		{
+			input: "fdname/https:0",
+			expectAddr: NetworkAddress{
+				Network: "fd",
+				Host:    "4",
+			},
+		},
+		{
+			input: "fdgramname/http",
+			expectAddr: NetworkAddress{
+				Network: "fdgram",
+				Host:    "3",
+			},
+		},
+		{
+			input: "fdgramname/https",
+			expectAddr: NetworkAddress{
+				Network: "fdgram",
+				Host:    "4",
+			},
+		},
+		{
+			input: "fdgramname/http:0",
+			expectAddr: NetworkAddress{
+				Network: "fdgram",
+				Host:    "3",
+			},
+		},
+		{
+			input:     "fdname/nonexistent",
+			expectErr: true,
+		},
+		{
+			input:     "fdgramname/nonexistent",
+			expectErr: true,
+		},
+		{
+			input:     "fdname/http:99",
+			expectErr: true,
+		},
+		{
+			input:     "fdname/invalid:abc",
+			expectErr: true,
+		},
+		// Test that old fd/N syntax still works
+		{
+			input: "fd/7",
+			expectAddr: NetworkAddress{
+				Network: "fd",
+				Host:    "7",
+			},
+		},
+		{
+			input: "fdgram/8",
+			expectAddr: NetworkAddress{
+				Network: "fdgram",
+				Host:    "8",
+			},
+		},
+	}
+
+	for i, tc := range tests {
+		actualAddr, err := ParseNetworkAddress(tc.input)
+
+		if tc.expectErr && err == nil {
+			t.Errorf("Test %d (%s): Expected error but got none", i, tc.input)
+		}
+		if !tc.expectErr && err != nil {
+			t.Errorf("Test %d (%s): Expected no error but got: %v", i, tc.input, err)
+		}
+		if !tc.expectErr && !reflect.DeepEqual(tc.expectAddr, actualAddr) {
+			t.Errorf("Test %d (%s): Expected %+v but got %+v", i, tc.input, tc.expectAddr, actualAddr)
+		}
+	}
+}

modules.go

@@ -345,9 +345,11 @@ func StrictUnmarshalJSON(data []byte, v any) error {
 	return dec.Decode(v)
 }
 
+var JSONRawMessageType = reflect.TypeFor[json.RawMessage]()
+
 // isJSONRawMessage returns true if the type is encoding/json.RawMessage.
 func isJSONRawMessage(typ reflect.Type) bool {
-	return typ.PkgPath() == "encoding/json" && typ.Name() == "RawMessage"
+	return typ == JSONRawMessageType
 }
 
 // isModuleMapType returns true if the type is map[string]json.RawMessage.

modules/caddyhttp/app.go

@@ -198,6 +198,8 @@ func (app *App) Provision(ctx caddy.Context) error {
 	if app.Metrics != nil {
 		app.Metrics.init = sync.Once{}
 		app.Metrics.httpMetrics = &httpMetrics{}
+		// Scan config for allowed hosts to prevent cardinality explosion
+		app.Metrics.scanConfigForHosts(app)
 	}
 	// prepare each server
 	oldContext := ctx.Context
@@ -466,7 +468,14 @@ func (app *App) Start() error {
 			ErrorLog:          serverLogger,
 			Protocols:         new(http.Protocols),
 			ConnContext: func(ctx context.Context, c net.Conn) context.Context {
-				return context.WithValue(ctx, ConnCtxKey, c)
+				if nc, ok := c.(interface{ tlsNetConn() net.Conn }); ok {
+					getTlsConStateFunc := sync.OnceValue(func() *tls.ConnectionState {
+						tlsConnState := nc.tlsNetConn().(connectionStater).ConnectionState()
+						return &tlsConnState
+					})
+					ctx = context.WithValue(ctx, tlsConnectionStateFuncCtxKey, getTlsConStateFunc)
+				}
+				return ctx
 			},
 		}
 
@@ -538,6 +547,8 @@ func (app *App) Start() error {
 						KeepAliveConfig: net.KeepAliveConfig{
 							Enable:   srv.KeepAliveInterval >= 0,
 							Interval: time.Duration(srv.KeepAliveInterval),
+							Idle:     time.Duration(srv.KeepAliveIdle),
+							Count:    srv.KeepAliveCount,
 						},
 					})
 					if err != nil {

modules/caddyhttp/caddyauth/argon2id.go

@@ -0,0 +1,188 @@
+// Copyright 2015 Matthew Holt and The Caddy Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package caddyauth
+
+import (
+	"crypto/rand"
+	"crypto/subtle"
+	"encoding/base64"
+	"fmt"
+	"strconv"
+	"strings"
+
+	"golang.org/x/crypto/argon2"
+
+	"github.com/caddyserver/caddy/v2"
+)
+
+func init() {
+	caddy.RegisterModule(Argon2idHash{})
+}
+
+const (
+	argon2idName           = "argon2id"
+	defaultArgon2idTime    = 1
+	defaultArgon2idMemory  = 46 * 1024
+	defaultArgon2idThreads = 1
+	defaultArgon2idKeylen  = 32
+	defaultSaltLength      = 16
+)
+
+// Argon2idHash implements the Argon2id password hashing.
+type Argon2idHash struct {
+	salt    []byte
+	time    uint32
+	memory  uint32
+	threads uint8
+	keyLen  uint32
+}
+
+// CaddyModule returns the Caddy module information.
+func (Argon2idHash) CaddyModule() caddy.ModuleInfo {
+	return caddy.ModuleInfo{
+		ID:  "http.authentication.hashes.argon2id",
+		New: func() caddy.Module { return new(Argon2idHash) },
+	}
+}
+
+// Compare checks if the plaintext password matches the given Argon2id hash.
+func (Argon2idHash) Compare(hashed, plaintext []byte) (bool, error) {
+	argHash, storedKey, err := DecodeHash(hashed)
+	if err != nil {
+		return false, err
+	}
+
+	computedKey := argon2.IDKey(
+		plaintext,
+		argHash.salt,
+		argHash.time,
+		argHash.memory,
+		argHash.threads,
+		argHash.keyLen,
+	)
+
+	return subtle.ConstantTimeCompare(storedKey, computedKey) == 1, nil
+}
+
+// Hash generates an Argon2id hash of the given plaintext using the configured parameters and salt.
+func (b Argon2idHash) Hash(plaintext []byte) ([]byte, error) {
+	if b.salt == nil {
+		s, err := generateSalt(defaultSaltLength)
+		if err != nil {
+			return nil, err
+		}
+		b.salt = s
+	}
+
+	key := argon2.IDKey(
+		plaintext,
+		b.salt,
+		b.time,
+		b.memory,
+		b.threads,
+		b.keyLen,
+	)
+
+	hash := fmt.Sprintf(
+		"$argon2id$v=%d$m=%d,t=%d,p=%d$%s$%s",
+		argon2.Version,
+		b.memory,
+		b.time,
+		b.threads,
+		base64.RawStdEncoding.EncodeToString(b.salt),
+		base64.RawStdEncoding.EncodeToString(key),
+	)
+
+	return []byte(hash), nil
+}
+
+// DecodeHash parses an Argon2id PHC string into an Argon2idHash struct and returns the struct along with the derived key.
+func DecodeHash(hash []byte) (*Argon2idHash, []byte, error) {
+	parts := strings.Split(string(hash), "$")
+	if len(parts) != 6 {
+		return nil, nil, fmt.Errorf("invalid hash format")
+	}
+
+	if parts[1] != argon2idName {
+		return nil, nil, fmt.Errorf("unsupported variant: %s", parts[1])
+	}
+
+	version, err := strconv.Atoi(strings.TrimPrefix(parts[2], "v="))
+	if err != nil {
+		return nil, nil, fmt.Errorf("invalid version: %w", err)
+	}
+	if version != argon2.Version {
+		return nil, nil, fmt.Errorf("incompatible version: %d", version)
+	}
+
+	params := strings.Split(parts[3], ",")
+	if len(params) != 3 {
+		return nil, nil, fmt.Errorf("invalid parameters")
+	}
+
+	mem, err := strconv.ParseUint(strings.TrimPrefix(params[0], "m="), 10, 32)
+	if err != nil {
+		return nil, nil, fmt.Errorf("invalid memory parameter: %w", err)
+	}
+
+	iter, err := strconv.ParseUint(strings.TrimPrefix(params[1], "t="), 10, 32)
+	if err != nil {
+		return nil, nil, fmt.Errorf("invalid iterations parameter: %w", err)
+	}
+
+	threads, err := strconv.ParseUint(strings.TrimPrefix(params[2], "p="), 10, 8)
+	if err != nil {
+		return nil, nil, fmt.Errorf("invalid parallelism parameter: %w", err)
+	}
+
+	salt, err := base64.RawStdEncoding.Strict().DecodeString(parts[4])
+	if err != nil {
+		return nil, nil, fmt.Errorf("decode salt: %w", err)
+	}
+
+	key, err := base64.RawStdEncoding.Strict().DecodeString(parts[5])
+	if err != nil {
+		return nil, nil, fmt.Errorf("decode key: %w", err)
+	}
+
+	return &Argon2idHash{
+		salt:    salt,
+		time:    uint32(iter),
+		memory:  uint32(mem),
+		threads: uint8(threads),
+		keyLen:  uint32(len(key)),
+	}, key, nil
+}
+
+// FakeHash returns a constant fake hash for timing attacks mitigation.
+func (Argon2idHash) FakeHash() []byte {
+	// hashed with the following command:
+	// caddy hash-password --plaintext "antitiming" --algorithm "argon2id"
+	return []byte("$argon2id$v=19$m=47104,t=1,p=1$P2nzckEdTZ3bxCiBCkRTyA$xQL3Z32eo5jKl7u5tcIsnEKObYiyNZQQf5/4sAau6Pg")
+}
+
+// Interface guards
+var (
+	_ Comparer = (*Argon2idHash)(nil)
+	_ Hasher   = (*Argon2idHash)(nil)
+)
+
+func generateSalt(length int) ([]byte, error) {
+	salt := make([]byte, length)
+	if _, err := rand.Read(salt); err != nil {
+		return nil, fmt.Errorf("failed to generate salt: %w", err)
+	}
+	return salt, nil
+}

modules/caddyhttp/caddyauth/bcrypt.go

@@ -27,7 +27,10 @@ func init() {
 }
 
 // defaultBcryptCost cost 14 strikes a solid balance between security, usability, and hardware performance
-const defaultBcryptCost = 14
+const (
+	bcryptName        = "bcrypt"
+	defaultBcryptCost = 14
+)
 
 // BcryptHash implements the bcrypt hash.
 type BcryptHash struct {

modules/caddyhttp/caddyauth/caddyfile.go

@@ -51,7 +51,7 @@ func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error)
 	var hashName string
 	switch len(args) {
 	case 0:
-		hashName = "bcrypt"
+		hashName = bcryptName
 	case 1:
 		hashName = args[0]
 	case 2:
@@ -62,8 +62,10 @@ func parseCaddyfile(h httpcaddyfile.Helper) (caddyhttp.MiddlewareHandler, error)
 	}
 
 	switch hashName {
-	case "bcrypt":
+	case bcryptName:
 		cmp = BcryptHash{}
+	case argon2idName:
+		cmp = Argon2idHash{}
 	default:
 		return nil, h.Errf("unrecognized hash algorithm: %s", hashName)
 	}

modules/caddyhttp/caddyauth/command.go

@@ -32,28 +32,55 @@ import (
 func init() {
 	caddycmd.RegisterCommand(caddycmd.Command{
 		Name:  "hash-password",
-		Usage: "[--plaintext <password>] [--algorithm <name>] [--bcrypt-cost <difficulty>]",
+		Usage: "[--plaintext <password>] [--algorithm <argon2id|bcrypt>] [--bcrypt-cost <difficulty>] [--argon2id-time <iterations>] [--argon2id-memory <KiB>] [--argon2id-threads <n>] [--argon2id-keylen <bytes>]",
 		Short: "Hashes a password and writes base64",
 		Long: `
 Convenient way to hash a plaintext password. The resulting
 hash is written to stdout as a base64 string.
 
---plaintext, when omitted, will be read from stdin. If
-Caddy is attached to a controlling tty, the plaintext will
-not be echoed.
+--plaintext
+    The password to hash. If omitted, it will be read from stdin.
+    If Caddy is attached to a controlling TTY, the input will not be echoed.
 
---algorithm currently only supports 'bcrypt', and is the default.
+--algorithm
+    Selects the hashing algorithm. Valid options are:
+      * 'argon2id' (recommended for modern security)
+      * 'bcrypt'  (legacy, slower, configurable cost)
 
---bcrypt-cost sets the bcrypt hashing difficulty.
-Higher values increase security by making the hash computation slower and more CPU-intensive.
-If the provided cost is not within the valid range [bcrypt.MinCost, bcrypt.MaxCost],
-the default value (defaultBcryptCost) will be used instead.
-Note: Higher cost values can significantly degrade performance on slower systems.
+bcrypt-specific parameters:
+
+--bcrypt-cost
+    Sets the bcrypt hashing difficulty. Higher values increase security by
+    making the hash computation slower and more CPU-intensive.
+    Must be within the valid range [bcrypt.MinCost, bcrypt.MaxCost]. 
+    If omitted or invalid, the default cost is used.
+
+Argon2id-specific parameters:
+
+--argon2id-time
+    Number of iterations to perform. Increasing this makes
+    hashing slower and more resistant to brute-force attacks.
+
+--argon2id-memory
+    Amount of memory to use during hashing.
+    Larger values increase resistance to GPU/ASIC attacks.
+
+--argon2id-threads
+    Number of CPU threads to use. Increase for faster hashing
+    on multi-core systems.
+
+--argon2id-keylen
+    Length of the resulting hash in bytes. Longer keys increase
+    security but slightly increase storage size.
 `,
 		CobraFunc: func(cmd *cobra.Command) {
 			cmd.Flags().StringP("plaintext", "p", "", "The plaintext password")
-			cmd.Flags().StringP("algorithm", "a", "bcrypt", "Name of the hash algorithm")
+			cmd.Flags().StringP("algorithm", "a", bcryptName, "Name of the hash algorithm")
 			cmd.Flags().Int("bcrypt-cost", defaultBcryptCost, "Bcrypt hashing cost (only used with 'bcrypt' algorithm)")
+			cmd.Flags().Uint32("argon2id-time", defaultArgon2idTime, "Number of iterations for Argon2id hashing. Increasing this makes the hash slower and more resistant to brute-force attacks.")
+			cmd.Flags().Uint32("argon2id-memory", defaultArgon2idMemory, "Memory to use in KiB for Argon2id hashing. Larger values increase resistance to GPU/ASIC attacks.")
+			cmd.Flags().Uint8("argon2id-threads", defaultArgon2idThreads, "Number of CPU threads to use for Argon2id hashing. Increase for faster hashing on multi-core systems.")
+			cmd.Flags().Uint32("argon2id-keylen", defaultArgon2idKeylen, "Length of the resulting Argon2id hash in bytes. Longer hashes increase security but slightly increase storage size.")
 			cmd.RunE = caddycmd.WrapCommandFuncForCobra(cmdHashPassword)
 		},
 	})
@@ -115,8 +142,34 @@ func cmdHashPassword(fs caddycmd.Flags) (int, error) {
 	var hash []byte
 	var hashString string
 	switch algorithm {
-	case "bcrypt":
+	case bcryptName:
 		hash, err = BcryptHash{cost: bcryptCost}.Hash(plaintext)
+		hashString = string(hash)
+	case argon2idName:
+		time, err := fs.GetUint32("argon2id-time")
+		if err != nil {
+			return caddy.ExitCodeFailedStartup, fmt.Errorf("failed to get argon2id time parameter: %w", err)
+		}
+		memory, err := fs.GetUint32("argon2id-memory")
+		if err != nil {
+			return caddy.ExitCodeFailedStartup, fmt.Errorf("failed to get argon2id memory parameter: %w", err)
+		}
+		threads, err := fs.GetUint8("argon2id-threads")
+		if err != nil {
+			return caddy.ExitCodeFailedStartup, fmt.Errorf("failed to get argon2id threads parameter: %w", err)
+		}
+		keyLen, err := fs.GetUint32("argon2id-keylen")
+		if err != nil {
+			return caddy.ExitCodeFailedStartup, fmt.Errorf("failed to get argon2id keylen parameter: %w", err)
+		}
+
+		hash, _ = Argon2idHash{
+			time:    time,
+			memory:  memory,
+			threads: threads,
+			keyLen:  keyLen,
+		}.Hash(plaintext)
+
 		hashString = string(hash)
 	default:
 		return caddy.ExitCodeFailedStartup, fmt.Errorf("unrecognized hash algorithm: %s", algorithm)

modules/caddyhttp/celmatcher.go

@@ -665,7 +665,7 @@ func celMatcherJSONMacroExpander(funcName string) parser.MacroExpander {
 // map literals containing heterogeneous values, in this case string and list
 // of string.
 func CELValueToMapStrList(data ref.Val) (map[string][]string, error) {
-	mapStrType := reflect.TypeOf(map[string]any{})
+	mapStrType := reflect.TypeFor[map[string]any]()
 	mapStrRaw, err := data.ConvertToNative(mapStrType)
 	if err != nil {
 		return nil, err

modules/caddyhttp/encode/encode.go

@@ -50,7 +50,7 @@ type Encode struct {
 	// Only encode responses that are at least this many bytes long.
 	MinLength int `json:"minimum_length,omitempty"`
 
-	// Only encode responses that match against this ResponseMmatcher.
+	// Only encode responses that match against this ResponseMatcher.
 	// The default is a collection of text-based Content-Type headers.
 	Matcher *caddyhttp.ResponseMatcher `json:"match,omitempty"`
 
@@ -168,8 +168,8 @@ func (enc *Encode) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyh
 			// caches without knowing about our changes...
 			if etag := r.Header.Get("If-None-Match"); etag != "" && !strings.HasPrefix(etag, "W/") {
 				ourSuffix := "-" + encName + `"`
-				if strings.HasSuffix(etag, ourSuffix) {
-					etag = strings.TrimSuffix(etag, ourSuffix) + `"`
+				if before, ok := strings.CutSuffix(etag, ourSuffix); ok {
+					etag = before + `"`
 					r.Header.Set("If-None-Match", etag)
 				}
 			}

modules/caddyhttp/http2listener.go

@@ -36,6 +36,12 @@ func (h *http2Listener) Accept() (net.Conn, error) {
 		return nil, err
 	}
 
+	// *tls.Conn doesn't need to be wrapped because we already removed unwanted alpns
+	// and handshake won't succeed without mutually supported alpns
+	if tlsConn, ok := conn.(*tls.Conn); ok {
+		return tlsConn, nil
+	}
+
 	_, isConnectionStater := conn.(connectionStater)
 	// emit a warning
 	if h.useTLS && !isConnectionStater {
@@ -46,6 +52,9 @@ func (h *http2Listener) Accept() (net.Conn, error) {
 
 	// if both h1 and h2 are enabled, we don't need to check the preface
 	if h.useH1 && h.useH2 {
+		if isConnectionStater {
+			return tlsStateConn{conn}, nil
+		}
 		return conn, nil
 	}
 
@@ -53,14 +62,26 @@ func (h *http2Listener) Accept() (net.Conn, error) {
 	// or else the listener wouldn't be created
 	h2Conn := &http2Conn{
 		h2Expected: h.useH2,
+		logger:     h.logger,
 		Conn:       conn,
 	}
 	if isConnectionStater {
-		return http2StateConn{h2Conn}, nil
+		return tlsStateConn{http2StateConn{h2Conn}}, nil
 	}
 	return h2Conn, nil
 }
 
+// tlsStateConn wraps a net.Conn that implements connectionStater to hide that method
+// we can call netConn to get the original net.Conn and get the tls connection state
+// golang 1.25 will call that method, and it breaks h2 with connections other than *tls.Conn
+type tlsStateConn struct {
+	net.Conn
+}
+
+func (conn tlsStateConn) tlsNetConn() net.Conn {
+	return conn.Conn
+}
+
 type http2StateConn struct {
 	*http2Conn
 }

modules/caddyhttp/intercept/intercept.go

@@ -17,6 +17,7 @@ package intercept
 import (
 	"bytes"
 	"fmt"
+	"io"
 	"net/http"
 	"strconv"
 	"strings"
@@ -175,10 +176,35 @@ func (ir Intercept) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddy
 		c.Write(zap.Int("handler", rec.handlerIndex))
 	}
 
-	// pass the request through the response handler routes
-	return rec.handler.Routes.Compile(next).ServeHTTP(w, r)
+	// response recorder doesn't create a new copy of the original headers, they're
+	// present in the original response writer
+	// create a new recorder to see if any response body from the new handler is present,
+	// if not, use the already buffered response body
+	recorder := caddyhttp.NewResponseRecorder(w, nil, nil)
+	if err := rec.handler.Routes.Compile(emptyHandler).ServeHTTP(recorder, r); err != nil {
+		return err
+	}
+
+	// no new response status and the status is not 0
+	if recorder.Status() == 0 && rec.Status() != 0 {
+		w.WriteHeader(rec.Status())
+	}
+
+	// no new response body and there is some in the original response
+	// TODO: what if the new response doesn't have a body by design?
+	// see: https://github.com/caddyserver/caddy/pull/6232#issue-2235224400
+	if recorder.Size() == 0 && buf.Len() > 0 {
+		_, err := io.Copy(w, buf)
+		return err
+	}
+	return nil
 }
 
+// this handler does nothing because everything we need is already buffered
+var emptyHandler caddyhttp.Handler = caddyhttp.HandlerFunc(func(_ http.ResponseWriter, req *http.Request) error {
+	return nil
+})
+
 // UnmarshalCaddyfile sets up the handler from Caddyfile tokens. Syntax:
 //
 //	intercept [<matcher>] {

modules/caddyhttp/logging.go

@@ -15,18 +15,28 @@
 package caddyhttp
 
 import (
+	"context"
 	"encoding/json"
 	"errors"
+	"log/slog"
 	"net"
 	"net/http"
 	"strings"
+	"sync"
 
 	"go.uber.org/zap"
+	"go.uber.org/zap/exp/zapslog"
 	"go.uber.org/zap/zapcore"
 
 	"github.com/caddyserver/caddy/v2"
 )
 
+func init() {
+	caddy.RegisterSlogHandlerFactory(func(handler slog.Handler, core zapcore.Core, moduleID string) slog.Handler {
+		return &extraFieldsSlogHandler{defaultHandler: handler, core: core, moduleID: moduleID}
+	})
+}
+
 // ServerLogConfig describes a server's logging configuration. If
 // enabled without customization, all requests to this server are
 // logged to the default logger; logger destinations may be
@@ -209,7 +219,7 @@ func errLogValues(err error) (status int, msg string, fields func() []zapcore.Fi
 				zap.String("err_trace", handlerErr.Trace),
 			}
 		}
-		return
+		return status, msg, fields
 	}
 	fields = func() []zapcore.Field {
 		return []zapcore.Field{
@@ -218,22 +228,26 @@ func errLogValues(err error) (status int, msg string, fields func() []zapcore.Fi
 	}
 	status = http.StatusInternalServerError
 	msg = err.Error()
-	return
+	return status, msg, fields
 }
 
 // ExtraLogFields is a list of extra fields to log with every request.
 type ExtraLogFields struct {
-	fields []zapcore.Field
+	fields   []zapcore.Field
+	handlers sync.Map
 }
 
 // Add adds a field to the list of extra fields to log.
 func (e *ExtraLogFields) Add(field zap.Field) {
+	e.handlers.Clear()
 	e.fields = append(e.fields, field)
 }
 
 // Set sets a field in the list of extra fields to log.
 // If the field already exists, it is replaced.
 func (e *ExtraLogFields) Set(field zap.Field) {
+	e.handlers.Clear()
+
 	for i := range e.fields {
 		if e.fields[i].Key == field.Key {
 			e.fields[i] = field
@@ -243,6 +257,29 @@ func (e *ExtraLogFields) Set(field zap.Field) {
 	e.fields = append(e.fields, field)
 }
 
+func (e *ExtraLogFields) getSloggerHandler(handler *extraFieldsSlogHandler) (h slog.Handler) {
+	if existing, ok := e.handlers.Load(handler); ok {
+		return existing.(slog.Handler)
+	}
+
+	if handler.moduleID == "" {
+		h = zapslog.NewHandler(handler.core.With(e.fields))
+	} else {
+		h = zapslog.NewHandler(handler.core.With(e.fields), zapslog.WithName(handler.moduleID))
+	}
+
+	if handler.group != "" {
+		h = h.WithGroup(handler.group)
+	}
+	if handler.attrs != nil {
+		h = h.WithAttrs(handler.attrs)
+	}
+
+	e.handlers.Store(handler, h)
+
+	return h
+}
+
 const (
 	// Variable name used to indicate that this request
 	// should be omitted from the access logs
@@ -254,3 +291,43 @@ const (
 	// Variable name used to indicate the logger to be used
 	AccessLoggerNameVarKey string = "access_logger_names"
 )
+
+type extraFieldsSlogHandler struct {
+	defaultHandler slog.Handler
+	core           zapcore.Core
+	moduleID       string
+	group          string
+	attrs          []slog.Attr
+}
+
+func (e *extraFieldsSlogHandler) Enabled(ctx context.Context, level slog.Level) bool {
+	return e.defaultHandler.Enabled(ctx, level)
+}
+
+func (e *extraFieldsSlogHandler) Handle(ctx context.Context, record slog.Record) error {
+	if elf, ok := ctx.Value(ExtraLogFieldsCtxKey).(*ExtraLogFields); ok {
+		return elf.getSloggerHandler(e).Handle(ctx, record)
+	}
+
+	return e.defaultHandler.Handle(ctx, record)
+}
+
+func (e *extraFieldsSlogHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
+	return &extraFieldsSlogHandler{
+		e.defaultHandler.WithAttrs(attrs),
+		e.core,
+		e.moduleID,
+		e.group,
+		append(e.attrs, attrs...),
+	}
+}
+
+func (e *extraFieldsSlogHandler) WithGroup(name string) slog.Handler {
+	return &extraFieldsSlogHandler{
+		e.defaultHandler.WithGroup(name),
+		e.core,
+		e.moduleID,
+		name,
+		e.attrs,
+	}
+}

modules/caddyhttp/matchers_test.go

@@ -992,7 +992,6 @@ func TestVarREMatcher(t *testing.T) {
 			expect: true,
 		},
 	} {
-		tc := tc // capture range value
 		t.Run(tc.desc, func(t *testing.T) {
 			t.Parallel()
 			// compile the regexp and validate its name

modules/caddyhttp/metrics.go

@@ -17,14 +17,60 @@ import (
 
 // Metrics configures metrics observations.
 // EXPERIMENTAL and subject to change or removal.
+//
+// Example configuration:
+//
+//	{
+//		"apps": {
+//			"http": {
+//				"metrics": {
+//					"per_host": true,
+//					"allow_catch_all_hosts": false
+//				},
+//				"servers": {
+//					"srv0": {
+//						"routes": [{
+//							"match": [{"host": ["example.com", "www.example.com"]}],
+//							"handle": [{"handler": "static_response", "body": "Hello"}]
+//						}]
+//					}
+//				}
+//			}
+//		}
+//	}
+//
+// In this configuration:
+// - Requests to example.com and www.example.com get individual host labels
+// - All other hosts (e.g., attacker.com) are aggregated under "_other" label
+// - This prevents unlimited cardinality from arbitrary Host headers
 type Metrics struct {
 	// Enable per-host metrics. Enabling this option may
 	// incur high-memory consumption, depending on the number of hosts
 	// managed by Caddy.
+	//
+	// CARDINALITY PROTECTION: To prevent unbounded cardinality attacks,
+	// only explicitly configured hosts (via host matchers) are allowed
+	// by default. Other hosts are aggregated under the "_other" label.
+	// See AllowCatchAllHosts to change this behavior.
 	PerHost bool `json:"per_host,omitempty"`
 
-	init        sync.Once
-	httpMetrics *httpMetrics `json:"-"`
+	// Allow metrics for catch-all hosts (hosts without explicit configuration).
+	// When false (default), only hosts explicitly configured via host matchers
+	// will get individual metrics labels. All other hosts will be aggregated
+	// under the "_other" label to prevent cardinality explosion.
+	//
+	// This is automatically enabled for HTTPS servers (since certificates provide
+	// some protection against unbounded cardinality), but disabled for HTTP servers
+	// by default to prevent cardinality attacks from arbitrary Host headers.
+	//
+	// Set to true to allow all hosts to get individual metrics (NOT RECOMMENDED
+	// for production environments exposed to the internet).
+	AllowCatchAllHosts bool `json:"allow_catch_all_hosts,omitempty"`
+
+	init           sync.Once
+	httpMetrics    *httpMetrics
+	allowedHosts   map[string]struct{}
+	hasHTTPSServer bool
 }
 
 type httpMetrics struct {
@@ -101,6 +147,63 @@ func initHTTPMetrics(ctx caddy.Context, metrics *Metrics) {
 	}, httpLabels)
 }
 
+// scanConfigForHosts scans the HTTP app configuration to build a set of allowed hosts
+// for metrics collection, similar to how auto-HTTPS scans for domain names.
+func (m *Metrics) scanConfigForHosts(app *App) {
+	if !m.PerHost {
+		return
+	}
+
+	m.allowedHosts = make(map[string]struct{})
+	m.hasHTTPSServer = false
+
+	for _, srv := range app.Servers {
+		// Check if this server has TLS enabled
+		serverHasTLS := len(srv.TLSConnPolicies) > 0
+		if serverHasTLS {
+			m.hasHTTPSServer = true
+		}
+
+		// Collect hosts from route matchers
+		for _, route := range srv.Routes {
+			for _, matcherSet := range route.MatcherSets {
+				for _, matcher := range matcherSet {
+					if hm, ok := matcher.(*MatchHost); ok {
+						for _, host := range *hm {
+							// Only allow non-fuzzy hosts to prevent unbounded cardinality
+							if !hm.fuzzy(host) {
+								m.allowedHosts[strings.ToLower(host)] = struct{}{}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+}
+
+// shouldAllowHostMetrics determines if metrics should be collected for the given host.
+// This implements the cardinality protection by only allowing metrics for:
+// 1. Explicitly configured hosts
+// 2. Catch-all requests on HTTPS servers (if AllowCatchAllHosts is true or auto-enabled)
+// 3. Catch-all requests on HTTP servers only if explicitly allowed
+func (m *Metrics) shouldAllowHostMetrics(host string, isHTTPS bool) bool {
+	if !m.PerHost {
+		return true // host won't be used in labels anyway
+	}
+
+	normalizedHost := strings.ToLower(host)
+
+	// Always allow explicitly configured hosts
+	if _, exists := m.allowedHosts[normalizedHost]; exists {
+		return true
+	}
+
+	// For catch-all requests (not in allowed hosts)
+	allowCatchAll := m.AllowCatchAllHosts || (isHTTPS && m.hasHTTPSServer)
+	return allowCatchAll
+}
+
 // serverNameFromContext extracts the current server name from the context.
 // Returns "UNKNOWN" if none is available (should probably never happen).
 func serverNameFromContext(ctx context.Context) string {
@@ -133,9 +236,19 @@ func (h *metricsInstrumentedHandler) ServeHTTP(w http.ResponseWriter, r *http.Re
 	// of a panic
 	statusLabels := prometheus.Labels{"server": server, "handler": h.handler, "method": method, "code": ""}
 
+	// Determine if this is an HTTPS request
+	isHTTPS := r.TLS != nil
+
 	if h.metrics.PerHost {
-		labels["host"] = strings.ToLower(r.Host)
-		statusLabels["host"] = strings.ToLower(r.Host)
+		// Apply cardinality protection for host metrics
+		if h.metrics.shouldAllowHostMetrics(r.Host, isHTTPS) {
+			labels["host"] = strings.ToLower(r.Host)
+			statusLabels["host"] = strings.ToLower(r.Host)
+		} else {
+			// Use a catch-all label for unallowed hosts to prevent cardinality explosion
+			labels["host"] = "_other"
+			statusLabels["host"] = "_other"
+		}
 	}
 
 	inFlight := h.metrics.httpMetrics.requestInFlight.With(labels)

modules/caddyhttp/metrics_test.go

@@ -2,6 +2,7 @@ package caddyhttp
 
 import (
 	"context"
+	"crypto/tls"
 	"errors"
 	"net/http"
 	"net/http/httptest"
@@ -206,9 +207,11 @@ func TestMetricsInstrumentedHandler(t *testing.T) {
 func TestMetricsInstrumentedHandlerPerHost(t *testing.T) {
 	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
 	metrics := &Metrics{
-		PerHost:     true,
-		init:        sync.Once{},
-		httpMetrics: &httpMetrics{},
+		PerHost:            true,
+		AllowCatchAllHosts: true, // Allow all hosts for testing
+		init:               sync.Once{},
+		httpMetrics:        &httpMetrics{},
+		allowedHosts:       make(map[string]struct{}),
 	}
 	handlerErr := errors.New("oh noes")
 	response := []byte("hello world!")
@@ -379,6 +382,112 @@ func TestMetricsInstrumentedHandlerPerHost(t *testing.T) {
 	}
 }
 
+func TestMetricsCardinalityProtection(t *testing.T) {
+	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
+
+	// Test 1: Without AllowCatchAllHosts, arbitrary hosts should be mapped to "_other"
+	metrics := &Metrics{
+		PerHost:            true,
+		AllowCatchAllHosts: false, // Default - should map unknown hosts to "_other"
+		init:               sync.Once{},
+		httpMetrics:        &httpMetrics{},
+		allowedHosts:       make(map[string]struct{}),
+	}
+
+	// Add one allowed host
+	metrics.allowedHosts["allowed.com"] = struct{}{}
+
+	mh := middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+		w.Write([]byte("hello"))
+		return nil
+	})
+
+	ih := newMetricsInstrumentedHandler(ctx, "test", mh, metrics)
+
+	// Test request to allowed host
+	r1 := httptest.NewRequest("GET", "http://allowed.com/", nil)
+	r1.Host = "allowed.com"
+	w1 := httptest.NewRecorder()
+	ih.ServeHTTP(w1, r1, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+
+	// Test request to unknown host (should be mapped to "_other")
+	r2 := httptest.NewRequest("GET", "http://attacker.com/", nil)
+	r2.Host = "attacker.com"
+	w2 := httptest.NewRecorder()
+	ih.ServeHTTP(w2, r2, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+
+	// Test request to another unknown host (should also be mapped to "_other")
+	r3 := httptest.NewRequest("GET", "http://evil.com/", nil)
+	r3.Host = "evil.com"
+	w3 := httptest.NewRecorder()
+	ih.ServeHTTP(w3, r3, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+
+	// Check that metrics contain:
+	// - One entry for "allowed.com"
+	// - One entry for "_other" (aggregating attacker.com and evil.com)
+	expected := `
+	# HELP caddy_http_requests_total Counter of HTTP(S) requests made.
+	# TYPE caddy_http_requests_total counter
+	caddy_http_requests_total{handler="test",host="_other",server="UNKNOWN"} 2
+	caddy_http_requests_total{handler="test",host="allowed.com",server="UNKNOWN"} 1
+	`
+
+	if err := testutil.GatherAndCompare(ctx.GetMetricsRegistry(), strings.NewReader(expected),
+		"caddy_http_requests_total",
+	); err != nil {
+		t.Errorf("Cardinality protection test failed: %s", err)
+	}
+}
+
+func TestMetricsHTTPSCatchAll(t *testing.T) {
+	ctx, _ := caddy.NewContext(caddy.Context{Context: context.Background()})
+
+	// Test that HTTPS requests allow catch-all even when AllowCatchAllHosts is false
+	metrics := &Metrics{
+		PerHost:            true,
+		AllowCatchAllHosts: false,
+		hasHTTPSServer:     true, // Simulate having HTTPS servers
+		init:               sync.Once{},
+		httpMetrics:        &httpMetrics{},
+		allowedHosts:       make(map[string]struct{}), // Empty - no explicitly allowed hosts
+	}
+
+	mh := middlewareHandlerFunc(func(w http.ResponseWriter, r *http.Request, h Handler) error {
+		w.Write([]byte("hello"))
+		return nil
+	})
+
+	ih := newMetricsInstrumentedHandler(ctx, "test", mh, metrics)
+
+	// Test HTTPS request (should be allowed even though not in allowedHosts)
+	r1 := httptest.NewRequest("GET", "https://unknown.com/", nil)
+	r1.Host = "unknown.com"
+	r1.TLS = &tls.ConnectionState{} // Mark as TLS/HTTPS
+	w1 := httptest.NewRecorder()
+	ih.ServeHTTP(w1, r1, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+
+	// Test HTTP request (should be mapped to "_other")
+	r2 := httptest.NewRequest("GET", "http://unknown.com/", nil)
+	r2.Host = "unknown.com"
+	// No TLS field = HTTP request
+	w2 := httptest.NewRecorder()
+	ih.ServeHTTP(w2, r2, HandlerFunc(func(w http.ResponseWriter, r *http.Request) error { return nil }))
+
+	// Check that HTTPS request gets real host, HTTP gets "_other"
+	expected := `
+	# HELP caddy_http_requests_total Counter of HTTP(S) requests made.
+	# TYPE caddy_http_requests_total counter
+	caddy_http_requests_total{handler="test",host="_other",server="UNKNOWN"} 1
+	caddy_http_requests_total{handler="test",host="unknown.com",server="UNKNOWN"} 1
+	`
+
+	if err := testutil.GatherAndCompare(ctx.GetMetricsRegistry(), strings.NewReader(expected),
+		"caddy_http_requests_total",
+	); err != nil {
+		t.Errorf("HTTPS catch-all test failed: %s", err)
+	}
+}
+
 type middlewareHandlerFunc func(http.ResponseWriter, *http.Request, Handler) error
 
 func (f middlewareHandlerFunc) ServeHTTP(w http.ResponseWriter, r *http.Request, h Handler) error {

modules/caddyhttp/requestbody/requestbody.go

@@ -116,7 +116,7 @@ func (ew errorWrapper) Read(p []byte) (n int, err error) {
 	if errors.As(err, &mbe) {
 		err = caddyhttp.Error(http.StatusRequestEntityTooLarge, err)
 	}
-	return
+	return n, err
 }
 
 // Interface guard

modules/caddyhttp/reverseproxy/caddyfile.go

@@ -888,8 +888,11 @@ func (h *Handler) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 			if commonScheme == "http" && te.TLSEnabled() {
 				return d.Errf("upstream address scheme is HTTP but transport is configured for HTTP+TLS (HTTPS)")
 			}
-			if te, ok := transport.(*HTTPTransport); ok && commonScheme == "h2c" {
-				te.Versions = []string{"h2c", "2"}
+			if h2ct, ok := transport.(H2CTransport); ok && commonScheme == "h2c" {
+				err := h2ct.EnableH2C()
+				if err != nil {
+					return err
+				}
 			}
 		} else if commonScheme == "https" {
 			return d.Errf("upstreams are configured for HTTPS but transport module does not support TLS: %T", transport)

modules/caddyhttp/reverseproxy/command.go

@@ -75,8 +75,8 @@ For proxying:
 			cmd.Flags().BoolP("insecure", "", false, "Disable TLS verification (WARNING: DISABLES SECURITY BY NOT VERIFYING TLS CERTIFICATES!)")
 			cmd.Flags().BoolP("disable-redirects", "r", false, "Disable HTTP->HTTPS redirects")
 			cmd.Flags().BoolP("internal-certs", "i", false, "Use internal CA for issuing certs")
-			cmd.Flags().StringSliceP("header-up", "H", []string{}, "Set a request header to send to the upstream (format: \"Field: value\")")
-			cmd.Flags().StringSliceP("header-down", "d", []string{}, "Set a response header to send back to the client (format: \"Field: value\")")
+			cmd.Flags().StringArrayP("header-up", "H", []string{}, "Set a request header to send to the upstream (format: \"Field: value\")")
+			cmd.Flags().StringArrayP("header-down", "d", []string{}, "Set a response header to send back to the client (format: \"Field: value\")")
 			cmd.Flags().BoolP("access-log", "", false, "Enable the access log")
 			cmd.Flags().BoolP("debug", "v", false, "Enable verbose debug logs")
 			cmd.RunE = caddycmd.WrapCommandFuncForCobra(cmdReverseProxy)
@@ -182,7 +182,7 @@ func cmdReverseProxy(fs caddycmd.Flags) (int, error) {
 	}
 
 	// set up header_up
-	headerUp, err := fs.GetStringSlice("header-up")
+	headerUp, err := fs.GetStringArray("header-up")
 	if err != nil {
 		return caddy.ExitCodeFailedStartup, fmt.Errorf("invalid header flag: %v", err)
 	}
@@ -204,7 +204,7 @@ func cmdReverseProxy(fs caddycmd.Flags) (int, error) {
 	}
 
 	// set up header_down
-	headerDown, err := fs.GetStringSlice("header-down")
+	headerDown, err := fs.GetStringArray("header-down")
 	if err != nil {
 		return caddy.ExitCodeFailedStartup, fmt.Errorf("invalid header flag: %v", err)
 	}

modules/caddyhttp/reverseproxy/fastcgi/client.go

@@ -154,13 +154,13 @@ func (c *client) Do(p map[string]string, req io.Reader) (r io.Reader, err error)
 
 	err = writer.writeBeginRequest(uint16(Responder), 0)
 	if err != nil {
-		return
+		return r, err
 	}
 
 	writer.recType = Params
 	err = writer.writePairs(p)
 	if err != nil {
-		return
+		return r, err
 	}
 
 	writer.recType = Stdin
@@ -176,7 +176,7 @@ func (c *client) Do(p map[string]string, req io.Reader) (r io.Reader, err error)
 	}
 
 	r = &streamReader{c: c}
-	return
+	return r, err
 }
 
 // clientCloser is a io.ReadCloser. It wraps a io.Reader with a Closer
@@ -213,7 +213,7 @@ func (f clientCloser) Close() error {
 func (c *client) Request(p map[string]string, req io.Reader) (resp *http.Response, err error) {
 	r, err := c.Do(p, req)
 	if err != nil {
-		return
+		return resp, err
 	}
 
 	rb := bufio.NewReader(r)
@@ -223,7 +223,7 @@ func (c *client) Request(p map[string]string, req io.Reader) (resp *http.Respons
 	// Parse the response headers.
 	mimeHeader, err := tp.ReadMIMEHeader()
 	if err != nil && err != io.EOF {
-		return
+		return resp, err
 	}
 	resp.Header = http.Header(mimeHeader)
 
@@ -231,7 +231,7 @@ func (c *client) Request(p map[string]string, req io.Reader) (resp *http.Respons
 		statusNumber, statusInfo, statusIsCut := strings.Cut(resp.Header.Get("Status"), " ")
 		resp.StatusCode, err = strconv.Atoi(statusNumber)
 		if err != nil {
-			return
+			return resp, err
 		}
 		if statusIsCut {
 			resp.Status = statusInfo
@@ -260,7 +260,7 @@ func (c *client) Request(p map[string]string, req io.Reader) (resp *http.Respons
 	}
 	resp.Body = closer
 
-	return
+	return resp, err
 }
 
 // Get issues a GET request to the fcgi responder.
@@ -329,7 +329,7 @@ func (c *client) PostFile(p map[string]string, data url.Values, file map[string]
 		for _, v0 := range val {
 			err = writer.WriteField(key, v0)
 			if err != nil {
-				return
+				return resp, err
 			}
 		}
 	}
@@ -347,13 +347,13 @@ func (c *client) PostFile(p map[string]string, data url.Values, file map[string]
 		}
 		_, err = io.Copy(part, fd)
 		if err != nil {
-			return
+			return resp, err
 		}
 	}
 
 	err = writer.Close()
 	if err != nil {
-		return
+		return resp, err
 	}
 
 	return c.Post(p, "POST", bodyType, buf, int64(buf.Len()))

modules/caddyhttp/reverseproxy/fastcgi/client_test.go

@@ -120,7 +120,7 @@ func sendFcgi(reqType int, fcgiParams map[string]string, data []byte, posts map[
 	conn, err := net.Dial("tcp", ipPort)
 	if err != nil {
 		log.Println("err:", err)
-		return
+		return content
 	}
 
 	fcgi := client{rwc: conn, reqID: 1}
@@ -162,7 +162,7 @@ func sendFcgi(reqType int, fcgiParams map[string]string, data []byte, posts map[
 
 	if err != nil {
 		log.Println("err:", err)
-		return
+		return content
 	}
 
 	defer resp.Body.Close()
@@ -176,7 +176,7 @@ func sendFcgi(reqType int, fcgiParams map[string]string, data []byte, posts map[
 		globalt.Error("Server return failed message")
 	}
 
-	return
+	return content
 }
 
 func generateRandFile(size int) (p string, m string) {
@@ -206,7 +206,7 @@ func generateRandFile(size int) (p string, m string) {
 		}
 	}
 	m = fmt.Sprintf("%x", h.Sum(nil))
-	return
+	return p, m
 }
 
 func DisabledTest(t *testing.T) {

modules/caddyhttp/reverseproxy/fastcgi/fastcgi.go

@@ -112,6 +112,20 @@ func (t *Transport) Provision(ctx caddy.Context) error {
 	return nil
 }
 
+// DefaultBufferSizes enables request buffering for fastcgi if not configured.
+// This is because most fastcgi servers are php-fpm that require the content length to be set to read the body, golang
+// std has fastcgi implementation that doesn't need this value to process the body, but we can safely assume that's
+// not used.
+// http3 requests have a negative content length for GET and HEAD requests, if that header is not sent.
+// see: https://github.com/caddyserver/caddy/issues/6678#issuecomment-2472224182
+// Though it appears even if CONTENT_LENGTH is invalid, php-fpm can handle just fine if the body is empty (no Stdin records sent).
+// php-fpm will hang if there is any data in the body though, https://github.com/caddyserver/caddy/issues/5420#issuecomment-2415943516
+
+// TODO: better default buffering for fastcgi requests without content length, in theory a value of 1 should be enough, make it bigger anyway
+func (t Transport) DefaultBufferSizes() (int64, int64) {
+	return 4096, 0
+}
+
 // RoundTrip implements http.RoundTripper.
 func (t Transport) RoundTrip(r *http.Request) (*http.Response, error) {
 	server := r.Context().Value(caddyhttp.ServerCtxKey).(*caddyhttp.Server)
@@ -427,6 +441,7 @@ var headerNameReplacer = strings.NewReplacer(" ", "_", "-", "_")
 var (
 	_ zapcore.ObjectMarshaler = (*loggableEnv)(nil)
 
-	_ caddy.Provisioner = (*Transport)(nil)
-	_ http.RoundTripper = (*Transport)(nil)
+	_ caddy.Provisioner              = (*Transport)(nil)
+	_ http.RoundTripper              = (*Transport)(nil)
+	_ reverseproxy.BufferedTransport = (*Transport)(nil)
 )

modules/caddyhttp/reverseproxy/fastcgi/record.go

@@ -30,23 +30,23 @@ func (rec *record) fill(r io.Reader) (err error) {
 	rec.lr.N = rec.padding
 	rec.lr.R = r
 	if _, err = io.Copy(io.Discard, rec); err != nil {
-		return
+		return err
 	}
 
 	if err = binary.Read(r, binary.BigEndian, &rec.h); err != nil {
-		return
+		return err
 	}
 	if rec.h.Version != 1 {
 		err = errors.New("fcgi: invalid header version")
-		return
+		return err
 	}
 	if rec.h.Type == EndRequest {
 		err = io.EOF
-		return
+		return err
 	}
 	rec.lr.N = int64(rec.h.ContentLength)
 	rec.padding = int64(rec.h.PaddingLength)
-	return
+	return err
 }
 
 func (rec *record) Read(p []byte) (n int, err error) {

modules/caddyhttp/reverseproxy/fastcgi/writer.go

@@ -112,7 +112,7 @@ func encodeSize(b []byte, size uint32) int {
 		binary.BigEndian.PutUint32(b, size)
 		return 4
 	}
-	b[0] = byte(size)
+	b[0] = byte(size) //nolint:gosec // false positive; b is made 8 bytes long, then this function is always called with b being at least 4 or 1 byte long
 	return 1
 }
 

modules/caddyhttp/reverseproxy/forwardauth/caddyfile.go

@@ -84,7 +84,7 @@ func parseCaddyfile(h httpcaddyfile.Helper) ([]httpcaddyfile.ConfigValue, error)
 	// create the reverse proxy handler
 	rpHandler := &reverseproxy.Handler{
 		// set up defaults for header_up; reverse_proxy already deals with
-		// adding  the other three X-Forwarded-* headers, but for this flow,
+		// adding the other three X-Forwarded-* headers, but for this flow,
 		// we want to also send along the incoming method and URI since this
 		// request will have a rewritten URI and method.
 		Headers: &headers.Handler{

modules/caddyhttp/reverseproxy/healthchecks.go

@@ -23,7 +23,6 @@ import (
 	"net/url"
 	"regexp"
 	"runtime/debug"
-	"slices"
 	"strconv"
 	"strings"
 	"time"
@@ -405,14 +404,9 @@ func (h *Handler) doActiveHealthCheck(dialInfo DialInfo, hostAddr string, networ
 		u.Host = net.JoinHostPort(host, port)
 	}
 
-	// this is kind of a hacky way to know if we should use HTTPS, but whatever
-	if tt, ok := h.Transport.(TLSTransport); ok && tt.TLSEnabled() {
-		u.Scheme = "https"
-
-		// if the port is in the except list, flip back to HTTP
-		if ht, ok := h.Transport.(*HTTPTransport); ok && slices.Contains(ht.TLS.ExceptPorts, port) {
-			u.Scheme = "http"
-		}
+	// override health check schemes if applicable
+	if hcsot, ok := h.Transport.(HealthCheckSchemeOverriderTransport); ok {
+		hcsot.OverrideHealthCheckScheme(u, port)
 	}
 
 	// if we have a provisioned uri, use that, otherwise use

modules/caddyhttp/reverseproxy/hosts.go

@@ -281,3 +281,10 @@ const proxyProtocolInfoVarKey = "reverse_proxy.proxy_protocol_info"
 type ProxyProtocolInfo struct {
 	AddrPort netip.AddrPort
 }
+
+// tlsH1OnlyVarKey is the key used that indicates the connection will use h1 only for TLS.
+// https://github.com/caddyserver/caddy/issues/7292
+const tlsH1OnlyVarKey = "reverse_proxy.tls_h1_only"
+
+// proxyVarKey is the key used that indicates the proxy server used for a request.
+const proxyVarKey = "reverse_proxy.proxy"

modules/caddyhttp/reverseproxy/httptransport.go

@@ -24,6 +24,7 @@ import (
 	weakrand "math/rand"
 	"net"
 	"net/http"
+	"net/url"
 	"os"
 	"reflect"
 	"slices"
@@ -159,8 +160,7 @@ type HTTPTransport struct {
 	// `HTTPS_PROXY`, and `NO_PROXY` environment variables.
 	NetworkProxyRaw json.RawMessage `json:"network_proxy,omitempty" caddy:"namespace=caddy.network_proxy inline_key=from"`
 
-	h2cTransport *http2.Transport
-	h3Transport  *http3.Transport // TODO: EXPERIMENTAL (May 2024)
+	h3Transport *http3.Transport // TODO: EXPERIMENTAL (May 2024)
 }
 
 // CaddyModule returns the Caddy module information.
@@ -204,11 +204,16 @@ func (h *HTTPTransport) Provision(ctx caddy.Context) error {
 func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, error) {
 	// Set keep-alive defaults if it wasn't otherwise configured
 	if h.KeepAlive == nil {
-		h.KeepAlive = &KeepAlive{
-			ProbeInterval:       caddy.Duration(30 * time.Second),
-			IdleConnTimeout:     caddy.Duration(2 * time.Minute),
-			MaxIdleConnsPerHost: 32, // seems about optimal, see #2805
-		}
+		h.KeepAlive = new(KeepAlive)
+	}
+	if h.KeepAlive.ProbeInterval == 0 {
+		h.KeepAlive.ProbeInterval = caddy.Duration(30 * time.Second)
+	}
+	if h.KeepAlive.IdleConnTimeout == 0 {
+		h.KeepAlive.IdleConnTimeout = caddy.Duration(2 * time.Minute)
+	}
+	if h.KeepAlive.MaxIdleConnsPerHost == 0 {
+		h.KeepAlive.MaxIdleConnsPerHost = 32 // seems about optimal, see #2805
 	}
 
 	// Set a relatively short default dial timeout.
@@ -267,15 +272,15 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 	}
 
 	dialContext := func(ctx context.Context, network, address string) (net.Conn, error) {
-		// For unix socket upstreams, we need to recover the dial info from
-		// the request's context, because the Host on the request's URL
-		// will have been modified by directing the request, overwriting
-		// the unix socket filename.
-		// Also, we need to avoid overwriting the address at this point
-		// when not necessary, because http.ProxyFromEnvironment may have
-		// modified the address according to the user's env proxy config.
+		// The network is usually tcp, and the address is the host in http.Request.URL.Host
+		// and that's been overwritten in directRequest
+		// However, if proxy is used according to http.ProxyFromEnvironment or proxy providers,
+		// address will be the address of the proxy server.
+
+		// This means we can safely use the address in dialInfo if proxy is not used (the address and network will be same any way)
+		// or if the upstream is unix (because there is no way socks or http proxy can be used for unix address).
 		if dialInfo, ok := GetDialInfo(ctx); ok {
-			if strings.HasPrefix(dialInfo.Network, "unix") {
+			if caddyhttp.GetVar(ctx, proxyVarKey) == nil || strings.HasPrefix(dialInfo.Network, "unix") {
 				network = dialInfo.Network
 				address = dialInfo.Address
 			}
@@ -376,9 +381,19 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 			return nil, fmt.Errorf("network_proxy module is not `(func(*http.Request) (*url.URL, error))``")
 		}
 	}
+	// we need to keep track if a proxy is used for a request
+	proxyWrapper := func(req *http.Request) (*url.URL, error) {
+		u, err := proxy(req)
+		if u == nil || err != nil {
+			return u, err
+		}
+		// there must be a proxy for this request
+		caddyhttp.SetVar(req.Context(), proxyVarKey, u)
+		return u, nil
+	}
 
 	rt := &http.Transport{
-		Proxy:                  proxy,
+		Proxy:                  proxyWrapper,
 		DialContext:            dialContext,
 		MaxConnsPerHost:        h.MaxConnsPerHost,
 		ResponseHeaderTimeout:  time.Duration(h.ResponseHeaderTimeout),
@@ -409,6 +424,14 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 				repl := ctx.Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
 				tlsConfig := rt.TLSClientConfig.Clone()
 				tlsConfig.ServerName = repl.ReplaceAll(tlsConfig.ServerName, "")
+
+				// h1 only
+				if caddyhttp.GetVar(ctx, tlsH1OnlyVarKey) == true {
+					// stdlib does this
+					// https://github.com/golang/go/blob/4837fbe4145cd47b43eed66fee9eed9c2b988316/src/net/http/transport.go#L1701
+					tlsConfig.NextProtos = nil
+				}
+
 				tlsConn := tls.Client(conn, tlsConfig)
 
 				// complete the handshake before returning the connection
@@ -449,24 +472,10 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 		rt.IdleConnTimeout = time.Duration(h.KeepAlive.IdleConnTimeout)
 	}
 
-	// The proxy protocol header can only be sent once right after opening the connection.
-	// So single connection must not be used for multiple requests, which can potentially
-	// come from different clients.
-	if !rt.DisableKeepAlives && h.ProxyProtocol != "" {
-		caddyCtx.Logger().Warn("disabling keepalives, they are incompatible with using PROXY protocol")
-		rt.DisableKeepAlives = true
-	}
-
 	if h.Compression != nil {
 		rt.DisableCompression = !*h.Compression
 	}
 
-	if slices.Contains(h.Versions, "2") {
-		if err := http2.ConfigureTransport(rt); err != nil {
-			return nil, err
-		}
-	}
-
 	// configure HTTP/3 transport if enabled; however, this does not
 	// automatically fall back to lower versions like most web browsers
 	// do (that'd add latency and complexity, besides, we expect that
@@ -484,25 +493,22 @@ func (h *HTTPTransport) NewTransport(caddyCtx caddy.Context) (*http.Transport, e
 		return nil, fmt.Errorf("if HTTP/3 is enabled to the upstream, no other HTTP versions are supported")
 	}
 
-	// if h2c is enabled, configure its transport (std lib http.Transport
-	// does not "HTTP/2 over cleartext TCP")
-	if slices.Contains(h.Versions, "h2c") {
-		// crafting our own http2.Transport doesn't allow us to utilize
-		// most of the customizations/preferences on the http.Transport,
-		// because, for some reason, only http2.ConfigureTransport()
-		// is allowed to set the unexported field that refers to a base
-		// http.Transport config; oh well
-		h2t := &http2.Transport{
-			// kind of a hack, but for plaintext/H2C requests, pretend to dial TLS
-			DialTLSContext: func(ctx context.Context, network, address string, _ *tls.Config) (net.Conn, error) {
-				return dialContext(ctx, network, address)
-			},
-			AllowHTTP: true,
+	// if h2/c is enabled, configure it explicitly
+	if slices.Contains(h.Versions, "2") || slices.Contains(h.Versions, "h2c") {
+		if err := http2.ConfigureTransport(rt); err != nil {
+			return nil, err
 		}
-		if h.Compression != nil {
-			h2t.DisableCompression = !*h.Compression
+
+		// DisableCompression from h2 is configured by http2.ConfigureTransport
+		// Likewise, DisableKeepAlives from h1 is used too.
+
+		// Protocols field is only used when the request is not using TLS,
+		// http1/2 over tls is still allowed
+		if slices.Contains(h.Versions, "h2c") {
+			rt.Protocols = new(http.Protocols)
+			rt.Protocols.SetUnencryptedHTTP2(true)
+			rt.Protocols.SetHTTP1(false)
 		}
-		h.h2cTransport = h2t
 	}
 
 	return rt, nil
@@ -517,15 +523,6 @@ func (h *HTTPTransport) RoundTrip(req *http.Request) (*http.Response, error) {
 		return h.h3Transport.RoundTrip(req)
 	}
 
-	// if H2C ("HTTP/2 over cleartext") is enabled and the upstream request is
-	// HTTP without TLS, use the alternate H2C-capable transport instead
-	if req.URL.Scheme == "http" && h.h2cTransport != nil {
-		// There is no dedicated DisableKeepAlives field in *http2.Transport.
-		// This is an alternative way to disable keep-alive.
-		req.Close = h.Transport.DisableKeepAlives
-		return h.h2cTransport.RoundTrip(req)
-	}
-
 	return h.Transport.RoundTrip(req)
 }
 
@@ -567,6 +564,26 @@ func (h *HTTPTransport) EnableTLS(base *TLSConfig) error {
 	return nil
 }
 
+// EnableH2C enables H2C (HTTP/2 over Cleartext) on the transport.
+func (h *HTTPTransport) EnableH2C() error {
+	h.Versions = []string{"h2c", "2"}
+	return nil
+}
+
+// OverrideHealthCheckScheme overrides the scheme of the given URL
+// used for health checks.
+func (h HTTPTransport) OverrideHealthCheckScheme(base *url.URL, port string) {
+	// if tls is enabled and the port isn't in the except list, use HTTPs
+	if h.TLSEnabled() && !slices.Contains(h.TLS.ExceptPorts, port) {
+		base.Scheme = "https"
+	}
+}
+
+// ProxyProtocolEnabled returns true if proxy protocol is enabled.
+func (h HTTPTransport) ProxyProtocolEnabled() bool {
+	return h.ProxyProtocol != ""
+}
+
 // Cleanup implements caddy.CleanerUpper and closes any idle connections.
 func (h HTTPTransport) Cleanup() error {
 	if h.Transport == nil {
@@ -823,8 +840,11 @@ func decodeBase64DERCert(certStr string) (*x509.Certificate, error) {
 
 // Interface guards
 var (
-	_ caddy.Provisioner  = (*HTTPTransport)(nil)
-	_ http.RoundTripper  = (*HTTPTransport)(nil)
-	_ caddy.CleanerUpper = (*HTTPTransport)(nil)
-	_ TLSTransport       = (*HTTPTransport)(nil)
+	_ caddy.Provisioner                   = (*HTTPTransport)(nil)
+	_ http.RoundTripper                   = (*HTTPTransport)(nil)
+	_ caddy.CleanerUpper                  = (*HTTPTransport)(nil)
+	_ TLSTransport                        = (*HTTPTransport)(nil)
+	_ H2CTransport                        = (*HTTPTransport)(nil)
+	_ HealthCheckSchemeOverriderTransport = (*HTTPTransport)(nil)
+	_ ProxyProtocolTransport              = (*HTTPTransport)(nil)
 )

modules/caddyhttp/reverseproxy/reverseproxy.go

@@ -243,18 +243,16 @@ func (h *Handler) Provision(ctx caddy.Context) error {
 			return fmt.Errorf("loading transport: %v", err)
 		}
 		h.Transport = mod.(http.RoundTripper)
-		// enable request buffering for fastcgi if not configured
-		// This is because most fastcgi servers are php-fpm that require the content length to be set to read the body, golang
-		// std has fastcgi implementation that doesn't need this value to process the body, but we can safely assume that's
-		// not used.
-		// http3 requests have a negative content length for GET and HEAD requests, if that header is not sent.
-		// see: https://github.com/caddyserver/caddy/issues/6678#issuecomment-2472224182
-		// Though it appears even if CONTENT_LENGTH is invalid, php-fpm can handle just fine if the body is empty (no Stdin records sent).
-		// php-fpm will hang if there is any data in the body though, https://github.com/caddyserver/caddy/issues/5420#issuecomment-2415943516
 
-		// TODO: better default buffering for fastcgi requests without content length, in theory a value of 1 should be enough, make it bigger anyway
-		if module, ok := h.Transport.(caddy.Module); ok && module.CaddyModule().ID.Name() == "fastcgi" && h.RequestBuffers == 0 {
-			h.RequestBuffers = 4096
+		// set default buffer sizes if applicable
+		if bt, ok := h.Transport.(BufferedTransport); ok {
+			reqBuffers, respBuffers := bt.DefaultBufferSizes()
+			if h.RequestBuffers == 0 {
+				h.RequestBuffers = reqBuffers
+			}
+			if h.ResponseBuffers == 0 {
+				h.ResponseBuffers = respBuffers
+			}
 		}
 	}
 	if h.LoadBalancing != nil && h.LoadBalancing.SelectionPolicyRaw != nil {
@@ -409,12 +407,16 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request, next caddyht
 		return caddyhttp.Error(http.StatusInternalServerError,
 			fmt.Errorf("preparing request for upstream round-trip: %v", err))
 	}
-	// websocket over http2, assuming backend doesn't support this, the request will be modified to http1.1 upgrade
+
+	// websocket over http2 or http3 if extended connect is enabled, assuming backend doesn't support this, the request will be modified to http1.1 upgrade
+	// Both use the same upgrade mechanism: server advertizes extended connect support, and client sends the pseudo header :protocol in a CONNECT request
+	// The quic-go http3 implementation also puts :protocol in r.Proto for CONNECT requests (quic-go/http3/headers.go@70-72,185,203)
 	// TODO: once we can reliably detect backend support this, it can be removed for those backends
-	if r.ProtoMajor == 2 && r.Method == http.MethodConnect && r.Header.Get(":protocol") == "websocket" {
+	if (r.ProtoMajor == 2 && r.Method == http.MethodConnect && r.Header.Get(":protocol") == "websocket") ||
+		(r.ProtoMajor == 3 && r.Method == http.MethodConnect && r.Proto == "websocket") {
 		clonedReq.Header.Del(":protocol")
 		// keep the body for later use. http1.1 upgrade uses http.NoBody
-		caddyhttp.SetVar(clonedReq.Context(), "h2_websocket_body", clonedReq.Body)
+		caddyhttp.SetVar(clonedReq.Context(), "extended_connect_websocket_body", clonedReq.Body)
 		clonedReq.Body = http.NoBody
 		clonedReq.Method = http.MethodGet
 		clonedReq.Header.Set("Upgrade", "websocket")
@@ -726,6 +728,12 @@ func (h Handler) prepareRequest(req *http.Request, repl *caddy.Replacer) (*http.
 	proxyProtocolInfo := ProxyProtocolInfo{AddrPort: addrPort}
 	caddyhttp.SetVar(req.Context(), proxyProtocolInfoVarKey, proxyProtocolInfo)
 
+	// some of the outbound requests require h1 (e.g. websocket)
+	// https://github.com/golang/go/blob/4837fbe4145cd47b43eed66fee9eed9c2b988316/src/net/http/request.go#L1579
+	if isWebsocket(req) {
+		caddyhttp.SetVar(req.Context(), tlsH1OnlyVarKey, true)
+	}
+
 	// Add the supported X-Forwarded-* headers
 	err = h.addForwardedHeaders(req)
 	if err != nil {
@@ -1188,7 +1196,7 @@ func (lb LoadBalancing) tryAgain(ctx caddy.Context, start time.Time, retries int
 
 // directRequest modifies only req.URL so that it points to the upstream
 // in the given DialInfo. It must modify ONLY the request URL.
-func (Handler) directRequest(req *http.Request, di DialInfo) {
+func (h *Handler) directRequest(req *http.Request, di DialInfo) {
 	// we need a host, so set the upstream's host address
 	reqHost := di.Address
 
@@ -1199,6 +1207,13 @@ func (Handler) directRequest(req *http.Request, di DialInfo) {
 		reqHost = di.Host
 	}
 
+	// add client address to the host to let transport differentiate requests from different clients
+	if ppt, ok := h.Transport.(ProxyProtocolTransport); ok && ppt.ProxyProtocolEnabled() {
+		if proxyProtocolInfo, ok := caddyhttp.GetVar(req.Context(), proxyProtocolInfoVarKey).(ProxyProtocolInfo); ok {
+			reqHost = proxyProtocolInfo.AddrPort.String() + "->" + reqHost
+		}
+	}
+
 	req.URL.Host = reqHost
 }
 
@@ -1484,6 +1499,32 @@ type TLSTransport interface {
 	EnableTLS(base *TLSConfig) error
 }
 
+// H2CTransport is implemented by transports
+// that are capable of using h2c.
+type H2CTransport interface {
+	EnableH2C() error
+}
+
+// ProxyProtocolTransport is implemented by transports
+// that are capable of using proxy protocol.
+type ProxyProtocolTransport interface {
+	ProxyProtocolEnabled() bool
+}
+
+// HealthCheckSchemeOverriderTransport is implemented by transports
+// that can override the scheme used for health checks.
+type HealthCheckSchemeOverriderTransport interface {
+	OverrideHealthCheckScheme(base *url.URL, port string)
+}
+
+// BufferedTransport is implemented by transports
+// that needs to buffer requests and/or responses.
+type BufferedTransport interface {
+	// DefaultBufferSizes returns the default buffer sizes
+	// for requests and responses, respectively if buffering isn't enabled.
+	DefaultBufferSizes() (int64, int64)
+}
+
 // roundtripSucceededError is an error type that is returned if the
 // roundtrip succeeded, but an error occurred after-the-fact.
 type roundtripSucceededError struct{ error }

modules/caddyhttp/reverseproxy/streaming.go

@@ -94,9 +94,9 @@ func (h *Handler) handleUpgradeResponse(logger *zap.Logger, wg *sync.WaitGroup,
 		conn io.ReadWriteCloser
 		brw  *bufio.ReadWriter
 	)
-	// websocket over http2, assuming backend doesn't support this, the request will be modified to http1.1 upgrade
+	// websocket over http2 or http3 if extended connect is enabled, assuming backend doesn't support this, the request will be modified to http1.1 upgrade
 	// TODO: once we can reliably detect backend support this, it can be removed for those backends
-	if body, ok := caddyhttp.GetVar(req.Context(), "h2_websocket_body").(io.ReadCloser); ok {
+	if body, ok := caddyhttp.GetVar(req.Context(), "extended_connect_websocket_body").(io.ReadCloser); ok {
 		req.Body = body
 		rw.Header().Del("Upgrade")
 		rw.Header().Del("Connection")
@@ -588,11 +588,11 @@ func (m *maxLatencyWriter) Write(p []byte) (n int, err error) {
 		m.logger.Debug("flushing immediately")
 		//nolint:errcheck
 		m.flush()
-		return
+		return n, err
 	}
 	if m.flushPending {
 		m.logger.Debug("delayed flush already pending")
-		return
+		return n, err
 	}
 	if m.t == nil {
 		m.t = time.AfterFunc(m.latency, m.delayedFlush)
@@ -603,7 +603,7 @@ func (m *maxLatencyWriter) Write(p []byte) (n int, err error) {
 		c.Write(zap.Duration("duration", m.latency))
 	}
 	m.flushPending = true
-	return
+	return n, err
 }
 
 func (m *maxLatencyWriter) delayedFlush() {

modules/caddyhttp/reverseproxy/upstreams.go

@@ -213,12 +213,12 @@ func (su SRVUpstreams) expandedAddr(r *http.Request) (addr, service, proto, name
 	name = repl.ReplaceAll(su.Name, "")
 	if su.Service == "" && su.Proto == "" {
 		addr = name
-		return
+		return addr, service, proto, name
 	}
 	service = repl.ReplaceAll(su.Service, "")
 	proto = repl.ReplaceAll(su.Proto, "")
 	addr = su.formattedAddr(service, proto, name)
-	return
+	return addr, service, proto, name
 }
 
 // formattedAddr the RFC 2782 representation of the SRV domain, in

modules/caddyhttp/server.go

@@ -33,7 +33,7 @@ import (
 	"github.com/caddyserver/certmagic"
 	"github.com/quic-go/quic-go"
 	"github.com/quic-go/quic-go/http3"
-	"github.com/quic-go/quic-go/qlog"
+	h3qlog "github.com/quic-go/quic-go/http3/qlog"
 	"go.uber.org/zap"
 	"go.uber.org/zap/zapcore"
 
@@ -76,9 +76,25 @@ type Server struct {
 
 	// KeepAliveInterval is the interval at which TCP keepalive packets
 	// are sent to keep the connection alive at the TCP layer when no other
-	// data is being transmitted. The default is 15s.
+	// data is being transmitted.
+	// If zero, the default is 15s.
+	// If negative, keepalive packets are not sent and other keepalive parameters
+	// are ignored.
 	KeepAliveInterval caddy.Duration `json:"keepalive_interval,omitempty"`
 
+	// KeepAliveIdle is the time that the connection must be idle before
+	// the first TCP keep-alive probe is sent when no other data is being
+	// transmitted.
+	// If zero, the default is 15s.
+	// If negative, underlying socket value is unchanged.
+	KeepAliveIdle caddy.Duration `json:"keepalive_idle,omitempty"`
+
+	// KeepAliveCount is the maximum number of TCP keep-alive probes that
+	// should be sent before dropping a connection.
+	// If zero, the default is 9.
+	// If negative, underlying socket value is unchanged.
+	KeepAliveCount int `json:"keepalive_count,omitempty"`
+
 	// MaxHeaderBytes is the maximum size to parse from a client's
 	// HTTP request headers.
 	MaxHeaderBytes int `json:"max_header_bytes,omitempty"`
@@ -186,6 +202,13 @@ type Server struct {
 	// This option is disabled by default.
 	TrustedProxiesStrict int `json:"trusted_proxies_strict,omitempty"`
 
+	// If greater than zero, enables trusting socket connections
+	// (e.g. Unix domain sockets) as coming from a trusted
+	// proxy.
+	//
+	// This option is disabled by default.
+	TrustedProxiesUnix bool `json:"trusted_proxies_unix,omitempty"`
+
 	// Enables access logging and configures how access logs are handled
 	// in this server. To minimally enable access logs, simply set this
 	// to a non-null, empty struct.
@@ -262,30 +285,28 @@ type Server struct {
 	onStopFuncs      []func(context.Context) error // TODO: Experimental (Nov. 2023)
 }
 
+var (
+	ServerHeader = "Caddy"
+	serverHeader = []string{ServerHeader}
+)
+
 // ServeHTTP is the entry point for all HTTP requests.
 func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// If there are listener wrappers that process tls connections but don't return a *tls.Conn, this field will be nil.
-	// TODO: Scheduled to be removed later because https://github.com/golang/go/pull/56110 has been merged.
 	if r.TLS == nil {
-		// not all requests have a conn (like virtual requests) - see #5698
-		if conn, ok := r.Context().Value(ConnCtxKey).(net.Conn); ok {
-			if csc, ok := conn.(connectionStater); ok {
-				r.TLS = new(tls.ConnectionState)
-				*r.TLS = csc.ConnectionState()
-			}
+		if tlsConnStateFunc, ok := r.Context().Value(tlsConnectionStateFuncCtxKey).(func() *tls.ConnectionState); ok {
+			r.TLS = tlsConnStateFunc()
 		}
 	}
 
-	w.Header().Set("Server", "Caddy")
+	h := w.Header()
+	h["Server"] = serverHeader
 
 	// advertise HTTP/3, if enabled
-	if s.h3server != nil {
-		if r.ProtoMajor < 3 {
-			err := s.h3server.SetQUICHeaders(w.Header())
-			if err != nil {
-				if c := s.logger.Check(zapcore.ErrorLevel, "setting HTTP/3 Alt-Svc header"); c != nil {
-					c.Write(zap.Error(err))
-				}
+	if s.h3server != nil && r.ProtoMajor < 3 {
+		if err := s.h3server.SetQUICHeaders(h); err != nil {
+			if c := s.logger.Check(zapcore.ErrorLevel, "setting HTTP/3 Alt-Svc header"); c != nil {
+				c.Write(zap.Error(err))
 			}
 		}
 	}
@@ -310,9 +331,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	// enable full-duplex for HTTP/1, ensuring the entire
 	// request body gets consumed before writing the response
 	if s.EnableFullDuplex && r.ProtoMajor == 1 {
-		//nolint:bodyclose
-		err := http.NewResponseController(w).EnableFullDuplex()
-		if err != nil {
+		if err := http.NewResponseController(w).EnableFullDuplex(); err != nil { //nolint:bodyclose
 			if c := s.logger.Check(zapcore.WarnLevel, "failed to enable full duplex"); c != nil {
 				c.Write(zap.Error(err))
 			}
@@ -399,8 +418,7 @@ func (s *Server) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	var fields []zapcore.Field
 	if s.Errors != nil && len(s.Errors.Routes) > 0 {
 		// execute user-defined error handling route
-		err2 := s.errorHandlerChain.ServeHTTP(w, r)
-		if err2 == nil {
+		if err2 := s.errorHandlerChain.ServeHTTP(w, r); err2 == nil {
 			// user's error route handled the error response
 			// successfully, so now just log the error
 			for _, logger := range errLoggers {
@@ -620,7 +638,7 @@ func (s *Server) serveHTTP3(addr caddy.NetworkAddress, tlsCfg *tls.Config) error
 			MaxHeaderBytes: s.MaxHeaderBytes,
 			QUICConfig: &quic.Config{
 				Versions: []quic.Version{quic.Version1, quic.Version2},
-				Tracer:   qlog.DefaultConnectionTracer,
+				Tracer:   h3qlog.DefaultConnectionTracer,
 			},
 			IdleTimeout: time.Duration(s.IdleTimeout),
 		}
@@ -775,8 +793,10 @@ func (s *Server) logRequest(
 	accLog *zap.Logger, r *http.Request, wrec ResponseRecorder, duration *time.Duration,
 	repl *caddy.Replacer, bodyReader *lengthReader, shouldLogCredentials bool,
 ) {
+	ctx := r.Context()
+
 	// this request may be flagged as omitted from the logs
-	if skip, ok := GetVar(r.Context(), LogSkipVar).(bool); ok && skip {
+	if skip, ok := GetVar(ctx, LogSkipVar).(bool); ok && skip {
 		return
 	}
 
@@ -794,7 +814,7 @@ func (s *Server) logRequest(
 	}
 
 	message := "handled request"
-	if nop, ok := GetVar(r.Context(), "unhandled").(bool); ok && nop {
+	if nop, ok := GetVar(ctx, "unhandled").(bool); ok && nop {
 		message = "NOP"
 	}
 
@@ -818,7 +838,7 @@ func (s *Server) logRequest(
 				reqBodyLength = bodyReader.Length
 			}
 
-			extra := r.Context().Value(ExtraLogFieldsCtxKey).(*ExtraLogFields)
+			extra := ctx.Value(ExtraLogFieldsCtxKey).(*ExtraLogFields)
 
 			fieldCount := 6
 			fields = make([]zapcore.Field, 0, fieldCount+len(extra.fields))
@@ -925,6 +945,17 @@ func determineTrustedProxy(r *http.Request, s *Server) (bool, string) {
 		return false, ""
 	}
 
+	if s.TrustedProxiesUnix && r.RemoteAddr == "@" {
+		if s.TrustedProxiesStrict > 0 {
+			ipRanges := []netip.Prefix{}
+			if s.trustedProxies != nil {
+				ipRanges = s.trustedProxies.GetIPRanges(r)
+			}
+			return true, strictUntrustedClientIp(r, s.ClientIPHeaders, ipRanges, "@")
+		} else {
+			return true, trustedRealClientIP(r, s.ClientIPHeaders, "@")
+		}
+	}
 	// Parse the remote IP, ignore the error as non-fatal,
 	// but the remote IP is required to continue, so we
 	// just return early. This should probably never happen
@@ -1081,11 +1112,14 @@ const (
 	// originally came into the server's entry handler
 	OriginalRequestCtxKey caddy.CtxKey = "original_request"
 
-	// For referencing underlying net.Conn
-	// This will eventually be deprecated and not used. To refer to the underlying connection, implement a middleware plugin
+	// DEPRECATED: not used anymore.
+	// To refer to the underlying connection, implement a middleware plugin
 	// that RegisterConnContext during provisioning.
 	ConnCtxKey caddy.CtxKey = "conn"
 
+	// used to get the tls connection state in the context, if available
+	tlsConnectionStateFuncCtxKey caddy.CtxKey = "tls_connection_state_func"
+
 	// For tracking whether the client is a trusted proxy
 	TrustedProxyVarKey string = "trusted_proxy"
 

modules/caddyhttp/server_test.go

@@ -297,6 +297,39 @@ func TestServer_DetermineTrustedProxy_TrustedLoopback(t *testing.T) {
 	assert.Equal(t, clientIP, "31.40.0.10")
 }
 
+func TestServer_DetermineTrustedProxy_UnixSocket(t *testing.T) {
+	server := &Server{
+		ClientIPHeaders:    []string{"X-Forwarded-For"},
+		TrustedProxiesUnix: true,
+	}
+
+	req := httptest.NewRequest("GET", "/", nil)
+	req.RemoteAddr = "@"
+	req.Header.Set("X-Forwarded-For", "2.2.2.2, 3.3.3.3")
+
+	trusted, clientIP := determineTrustedProxy(req, server)
+
+	assert.True(t, trusted)
+	assert.Equal(t, "2.2.2.2", clientIP)
+}
+
+func TestServer_DetermineTrustedProxy_UnixSocketStrict(t *testing.T) {
+	server := &Server{
+		ClientIPHeaders:      []string{"X-Forwarded-For"},
+		TrustedProxiesUnix:   true,
+		TrustedProxiesStrict: 1,
+	}
+
+	req := httptest.NewRequest("GET", "/", nil)
+	req.RemoteAddr = "@"
+	req.Header.Set("X-Forwarded-For", "2.2.2.2, 3.3.3.3")
+
+	trusted, clientIP := determineTrustedProxy(req, server)
+
+	assert.True(t, trusted)
+	assert.Equal(t, "3.3.3.3", clientIP)
+}
+
 func TestServer_DetermineTrustedProxy_UntrustedPrefix(t *testing.T) {
 	loopbackPrefix, _ := netip.ParsePrefix("127.0.0.1/8")
 

modules/caddyhttp/staticresp.go

@@ -79,7 +79,7 @@ Response headers may be added using the --header flag for each header field.
 			cmd.Flags().StringP("body", "b", "", "The body of the HTTP response")
 			cmd.Flags().BoolP("access-log", "", false, "Enable the access log")
 			cmd.Flags().BoolP("debug", "v", false, "Enable more verbose debug-level logging")
-			cmd.Flags().StringSliceP("header", "H", []string{}, "Set a header on the response (format: \"Field: value\")")
+			cmd.Flags().StringArrayP("header", "H", []string{}, "Set a header on the response (format: \"Field: value\")")
 			cmd.RunE = caddycmd.WrapCommandFuncForCobra(cmdRespond)
 		},
 	})
@@ -359,7 +359,7 @@ func cmdRespond(fl caddycmd.Flags) (int, error) {
 	}
 
 	// build headers map
-	headers, err := fl.GetStringSlice("header")
+	headers, err := fl.GetStringArray("header")
 	if err != nil {
 		return caddy.ExitCodeFailedStartup, fmt.Errorf("invalid header flag: %v", err)
 	}

modules/caddyhttp/tracing/tracer.go

@@ -5,10 +5,10 @@ import (
 	"fmt"
 	"net/http"
 
+	"go.opentelemetry.io/contrib/exporters/autoexport"
 	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 	"go.opentelemetry.io/contrib/propagators/autoprop"
 	"go.opentelemetry.io/otel/attribute"
-	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
 	"go.opentelemetry.io/otel/propagation"
 	"go.opentelemetry.io/otel/sdk/resource"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
@@ -63,7 +63,7 @@ func newOpenTelemetryWrapper(
 		return ot, fmt.Errorf("creating resource error: %w", err)
 	}
 
-	traceExporter, err := otlptracegrpc.New(ctx)
+	traceExporter, err := autoexport.NewSpanExporter(ctx)
 	if err != nil {
 		return ot, fmt.Errorf("creating trace exporter error: %w", err)
 	}

modules/caddypki/adminapi.go

@@ -220,13 +220,13 @@ func (a *adminAPI) getCAFromAPIRequestPath(r *http.Request) (*CA, error) {
 func rootAndIntermediatePEM(ca *CA) (root, inter []byte, err error) {
 	root, err = pemEncodeCert(ca.RootCertificate().Raw)
 	if err != nil {
-		return
+		return root, inter, err
 	}
 	inter, err = pemEncodeCert(ca.IntermediateCertificate().Raw)
 	if err != nil {
-		return
+		return root, inter, err
 	}
-	return
+	return root, inter, err
 }
 
 // caInfo is the response structure for the CA info API endpoint.

modules/caddypki/ca.go

@@ -124,8 +124,6 @@ func (ca *CA) Provision(ctx caddy.Context, id string, log *zap.Logger) error {
 	}
 	if ca.IntermediateLifetime == 0 {
 		ca.IntermediateLifetime = caddy.Duration(defaultIntermediateLifetime)
-	} else if time.Duration(ca.IntermediateLifetime) >= defaultRootLifetime {
-		return fmt.Errorf("intermediate certificate lifetime must be less than root certificate lifetime (%s)", defaultRootLifetime)
 	}
 
 	// load the certs and key that will be used for signing
@@ -144,6 +142,10 @@ func (ca *CA) Provision(ctx caddy.Context, id string, log *zap.Logger) error {
 	if err != nil {
 		return err
 	}
+	actualRootLifetime := time.Until(rootCert.NotAfter)
+	if time.Duration(ca.IntermediateLifetime) >= actualRootLifetime {
+		return fmt.Errorf("intermediate certificate lifetime must be less than actual root certificate lifetime (%s)", actualRootLifetime)
+	}
 	if ca.Intermediate != nil {
 		interCert, interKey, err = ca.Intermediate.Load()
 	} else {

modules/caddytls/leaffolderloader.go

@@ -29,9 +29,9 @@ func init() {
 	caddy.RegisterModule(LeafFolderLoader{})
 }
 
-// LeafFolderLoader loads certificates and their associated keys from disk
+// LeafFolderLoader loads certificates from disk
 // by recursively walking the specified directories, looking for PEM
-// files which contain both a certificate and a key.
+// files which contain a certificate.
 type LeafFolderLoader struct {
 	Folders []string `json:"folders,omitempty"`
 }

modules/logging/filewriter.go

@@ -22,9 +22,11 @@ import (
 	"os"
 	"path/filepath"
 	"strconv"
+	"strings"
+	"time"
 
+	"github.com/DeRuina/timberjack"
 	"github.com/dustin/go-humanize"
-	"gopkg.in/natefinch/lumberjack.v2"
 
 	"github.com/caddyserver/caddy/v2"
 	"github.com/caddyserver/caddy/v2/caddyconfig/caddyfile"
@@ -96,6 +98,21 @@ type FileWriter struct {
 	// it will be rotated.
 	RollSizeMB int `json:"roll_size_mb,omitempty"`
 
+	// Roll log file after some time
+	RollInterval time.Duration `json:"roll_interval,omitempty"`
+
+	// Roll log file at fix minutes
+	// For example []int{0, 30} will roll file at xx:00 and xx:30 each hour
+	// Invalid value are ignored with a warning on stderr
+	// See https://github.com/DeRuina/timberjack#%EF%B8%8F-rotation-notes--warnings for caveats
+	RollAtMinutes []int `json:"roll_minutes,omitempty"`
+
+	// Roll log file at fix time
+	// For example []string{"00:00", "12:00"} will roll file at 00:00 and 12:00 each day
+	// Invalid value are ignored with a warning on stderr
+	// See https://github.com/DeRuina/timberjack#%EF%B8%8F-rotation-notes--warnings for caveats
+	RollAt []string `json:"roll_at,omitempty"`
+
 	// Whether to compress rolled files. Default: true
 	RollCompress *bool `json:"roll_gzip,omitempty"`
 
@@ -109,6 +126,11 @@ type FileWriter struct {
 
 	// How many days to keep rolled log files. Default: 90
 	RollKeepDays int `json:"roll_keep_days,omitempty"`
+
+	// Rotated file will have format <logfilename>-<format>-<criterion>.log
+	// Optional. If unset or invalid, defaults to 2006-01-02T15-04-05.000 (with fallback warning)
+	// <format> must be a Go time compatible format, see https://pkg.go.dev/time#pkg-constants
+	BackupTimeFormat string `json:"backup_time_format,omitempty"`
 }
 
 // CaddyModule returns the Caddy module information.
@@ -156,7 +178,7 @@ func (fw FileWriter) OpenWriter() (io.WriteCloser, error) {
 	roll := fw.Roll == nil || *fw.Roll
 
 	// create the file if it does not exist; create with the configured mode, or default
-	// to restrictive if not set. (lumberjack will reuse the file mode across log rotation)
+	// to restrictive if not set. (timberjack will reuse the file mode across log rotation)
 	if err := os.MkdirAll(filepath.Dir(fw.Filename), 0o700); err != nil {
 		return nil, err
 	}
@@ -166,7 +188,7 @@ func (fw FileWriter) OpenWriter() (io.WriteCloser, error) {
 	}
 	info, err := file.Stat()
 	if roll {
-		file.Close() // lumberjack will reopen it on its own
+		file.Close() // timberjack will reopen it on its own
 	}
 
 	// Ensure already existing files have the right mode, since OpenFile will not set the mode in such case.
@@ -201,13 +223,17 @@ func (fw FileWriter) OpenWriter() (io.WriteCloser, error) {
 	if fw.RollKeepDays == 0 {
 		fw.RollKeepDays = 90
 	}
-	return &lumberjack.Logger{
-		Filename:   fw.Filename,
-		MaxSize:    fw.RollSizeMB,
-		MaxAge:     fw.RollKeepDays,
-		MaxBackups: fw.RollKeep,
-		LocalTime:  fw.RollLocalTime,
-		Compress:   *fw.RollCompress,
+	return &timberjack.Logger{
+		Filename:         fw.Filename,
+		MaxSize:          fw.RollSizeMB,
+		MaxAge:           fw.RollKeepDays,
+		MaxBackups:       fw.RollKeep,
+		LocalTime:        fw.RollLocalTime,
+		Compress:         *fw.RollCompress,
+		RotationInterval: fw.RollInterval,
+		RotateAtMinutes:  fw.RollAtMinutes,
+		RotateAt:         fw.RollAt,
+		BackupTimeFormat: fw.BackupTimeFormat,
 	}, nil
 }
 
@@ -314,6 +340,53 @@ func (fw *FileWriter) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 			}
 			fw.RollKeepDays = int(math.Ceil(keepFor.Hours() / 24))
 
+		case "roll_interval":
+			var durationStr string
+			if !d.AllArgs(&durationStr) {
+				return d.ArgErr()
+			}
+			duration, err := time.ParseDuration(durationStr)
+			if err != nil {
+				return d.Errf("parsing roll_interval duration: %v", err)
+			}
+			fw.RollInterval = duration
+
+		case "roll_minutes":
+			var minutesArrayStr string
+			if !d.AllArgs(&minutesArrayStr) {
+				return d.ArgErr()
+			}
+			minutesStr := strings.Split(minutesArrayStr, ",")
+			minutes := make([]int, len(minutesStr))
+			for i := range minutesStr {
+				ms := strings.Trim(minutesStr[i], " ")
+				m, err := strconv.Atoi(ms)
+				if err != nil {
+					return d.Errf("parsing roll_minutes number: %v", err)
+				}
+				minutes[i] = m
+			}
+			fw.RollAtMinutes = minutes
+
+		case "roll_at":
+			var timeArrayStr string
+			if !d.AllArgs(&timeArrayStr) {
+				return d.ArgErr()
+			}
+			timeStr := strings.Split(timeArrayStr, ",")
+			times := make([]string, len(timeStr))
+			for i := range timeStr {
+				times[i] = strings.Trim(timeStr[i], " ")
+			}
+			fw.RollAt = times
+
+		case "backup_time_format":
+			var format string
+			if !d.AllArgs(&format) {
+				return d.ArgErr()
+			}
+			fw.BackupTimeFormat = format
+
 		default:
 			return d.Errf("unrecognized subdirective '%s'", d.Val())
 		}

modules/logging/filterencoder.go

@@ -152,6 +152,9 @@ func (fe *FilterEncoder) ConfigureDefaultFormat(wo caddy.WriterOpener) error {
 func (fe *FilterEncoder) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 	d.Next() // consume encoder name
 
+	// Track regexp filters for automatic merging
+	regexpFilters := make(map[string][]*RegexpFilter)
+
 	// parse a field
 	parseField := func() error {
 		if fe.FieldsRaw == nil {
@@ -171,6 +174,23 @@ func (fe *FilterEncoder) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 		if !ok {
 			return d.Errf("module %s (%T) is not a logging.LogFieldFilter", moduleID, unm)
 		}
+
+		// Special handling for regexp filters to support multiple instances
+		if regexpFilter, isRegexp := filter.(*RegexpFilter); isRegexp {
+			regexpFilters[field] = append(regexpFilters[field], regexpFilter)
+			return nil // Don't set FieldsRaw yet, we'll merge them later
+		}
+
+		// Check if we're trying to add a non-regexp filter to a field that already has regexp filters
+		if _, hasRegexpFilters := regexpFilters[field]; hasRegexpFilters {
+			return d.Errf("cannot mix regexp filters with other filter types for field %s", field)
+		}
+
+		// Check if field already has a filter and it's not regexp-related
+		if _, exists := fe.FieldsRaw[field]; exists {
+			return d.Errf("field %s already has a filter; multiple non-regexp filters per field are not supported", field)
+		}
+
 		fe.FieldsRaw[field] = caddyconfig.JSONModuleObject(filter, "filter", filterName, nil)
 		return nil
 	}
@@ -210,6 +230,25 @@ func (fe *FilterEncoder) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
 			}
 		}
 	}
+
+	// After parsing all fields, merge multiple regexp filters into MultiRegexpFilter
+	for field, filters := range regexpFilters {
+		if len(filters) == 1 {
+			// Single regexp filter, use the original RegexpFilter
+			fe.FieldsRaw[field] = caddyconfig.JSONModuleObject(filters[0], "filter", "regexp", nil)
+		} else {
+			// Multiple regexp filters, merge into MultiRegexpFilter
+			multiFilter := &MultiRegexpFilter{}
+			for _, regexpFilter := range filters {
+				err := multiFilter.AddOperation(regexpFilter.RawRegexp, regexpFilter.Value)
+				if err != nil {
+					return fmt.Errorf("adding regexp operation for field %s: %v", field, err)
+				}
+			}
+			fe.FieldsRaw[field] = caddyconfig.JSONModuleObject(multiFilter, "filter", "multi_regexp", nil)
+		}
+	}
+
 	return nil
 }
 

modules/logging/filters.go

@@ -41,6 +41,7 @@ func init() {
 	caddy.RegisterModule(CookieFilter{})
 	caddy.RegisterModule(RegexpFilter{})
 	caddy.RegisterModule(RenameFilter{})
+	caddy.RegisterModule(MultiRegexpFilter{})
 }
 
 // LogFieldFilter can filter (or manipulate)
@@ -625,6 +626,222 @@ func (f *RegexpFilter) Filter(in zapcore.Field) zapcore.Field {
 	return in
 }
 
+// regexpFilterOperation represents a single regexp operation
+// within a MultiRegexpFilter.
+type regexpFilterOperation struct {
+	// The regular expression pattern defining what to replace.
+	RawRegexp string `json:"regexp,omitempty"`
+
+	// The value to use as replacement
+	Value string `json:"value,omitempty"`
+
+	regexp *regexp.Regexp
+}
+
+// MultiRegexpFilter is a Caddy log field filter that
+// can apply multiple regular expression replacements to
+// the same field. This filter processes operations in the
+// order they are defined, applying each regexp replacement
+// sequentially to the result of the previous operation.
+//
+// This allows users to define multiple regexp filters for
+// the same field without them overwriting each other.
+//
+// Security considerations:
+// - Uses Go's regexp package (RE2 engine) which is safe from ReDoS attacks
+// - Validates all patterns during provisioning
+// - Limits the maximum number of operations to prevent resource exhaustion
+// - Sanitizes input to prevent injection attacks
+type MultiRegexpFilter struct {
+	// A list of regexp operations to apply in sequence.
+	// Maximum of 50 operations allowed for security and performance.
+	Operations []regexpFilterOperation `json:"operations"`
+}
+
+// Security constants
+const (
+	maxRegexpOperations = 50   // Maximum operations to prevent resource exhaustion
+	maxPatternLength    = 1000 // Maximum pattern length to prevent abuse
+)
+
+// CaddyModule returns the Caddy module information.
+func (MultiRegexpFilter) CaddyModule() caddy.ModuleInfo {
+	return caddy.ModuleInfo{
+		ID:  "caddy.logging.encoders.filter.multi_regexp",
+		New: func() caddy.Module { return new(MultiRegexpFilter) },
+	}
+}
+
+// UnmarshalCaddyfile sets up the module from Caddyfile tokens.
+// Syntax:
+//
+//	multi_regexp {
+//	    regexp <pattern> <replacement>
+//	    regexp <pattern> <replacement>
+//	    ...
+//	}
+func (f *MultiRegexpFilter) UnmarshalCaddyfile(d *caddyfile.Dispenser) error {
+	d.Next() // consume filter name
+	for d.NextBlock(0) {
+		switch d.Val() {
+		case "regexp":
+			// Security check: limit number of operations
+			if len(f.Operations) >= maxRegexpOperations {
+				return d.Errf("too many regexp operations (maximum %d allowed)", maxRegexpOperations)
+			}
+
+			op := regexpFilterOperation{}
+			if !d.NextArg() {
+				return d.ArgErr()
+			}
+			op.RawRegexp = d.Val()
+
+			// Security validation: check pattern length
+			if len(op.RawRegexp) > maxPatternLength {
+				return d.Errf("regexp pattern too long (maximum %d characters)", maxPatternLength)
+			}
+
+			// Security validation: basic pattern validation
+			if op.RawRegexp == "" {
+				return d.Errf("regexp pattern cannot be empty")
+			}
+
+			if !d.NextArg() {
+				return d.ArgErr()
+			}
+			op.Value = d.Val()
+			f.Operations = append(f.Operations, op)
+		default:
+			return d.Errf("unrecognized subdirective %s", d.Val())
+		}
+	}
+
+	// Security check: ensure at least one operation is defined
+	if len(f.Operations) == 0 {
+		return d.Err("multi_regexp filter requires at least one regexp operation")
+	}
+
+	return nil
+}
+
+// Provision compiles all regexp patterns with security validation.
+func (f *MultiRegexpFilter) Provision(ctx caddy.Context) error {
+	// Security check: validate operation count
+	if len(f.Operations) > maxRegexpOperations {
+		return fmt.Errorf("too many regexp operations: %d (maximum %d allowed)", len(f.Operations), maxRegexpOperations)
+	}
+
+	if len(f.Operations) == 0 {
+		return fmt.Errorf("multi_regexp filter requires at least one operation")
+	}
+
+	for i := range f.Operations {
+		// Security validation: pattern length check
+		if len(f.Operations[i].RawRegexp) > maxPatternLength {
+			return fmt.Errorf("regexp pattern %d too long: %d characters (maximum %d)", i, len(f.Operations[i].RawRegexp), maxPatternLength)
+		}
+
+		// Security validation: empty pattern check
+		if f.Operations[i].RawRegexp == "" {
+			return fmt.Errorf("regexp pattern %d cannot be empty", i)
+		}
+
+		// Compile and validate the pattern (uses RE2 engine - safe from ReDoS)
+		r, err := regexp.Compile(f.Operations[i].RawRegexp)
+		if err != nil {
+			return fmt.Errorf("compiling regexp pattern %d (%s): %v", i, f.Operations[i].RawRegexp, err)
+		}
+		f.Operations[i].regexp = r
+	}
+	return nil
+}
+
+// Validate ensures the filter is properly configured with security checks.
+func (f *MultiRegexpFilter) Validate() error {
+	if len(f.Operations) == 0 {
+		return fmt.Errorf("multi_regexp filter requires at least one operation")
+	}
+
+	if len(f.Operations) > maxRegexpOperations {
+		return fmt.Errorf("too many regexp operations: %d (maximum %d allowed)", len(f.Operations), maxRegexpOperations)
+	}
+
+	for i, op := range f.Operations {
+		if op.RawRegexp == "" {
+			return fmt.Errorf("regexp pattern %d cannot be empty", i)
+		}
+		if len(op.RawRegexp) > maxPatternLength {
+			return fmt.Errorf("regexp pattern %d too long: %d characters (maximum %d)", i, len(op.RawRegexp), maxPatternLength)
+		}
+		if op.regexp == nil {
+			return fmt.Errorf("regexp pattern %d not compiled (call Provision first)", i)
+		}
+	}
+	return nil
+}
+
+// Filter applies all regexp operations sequentially to the input field.
+// Input is sanitized and validated for security.
+func (f *MultiRegexpFilter) Filter(in zapcore.Field) zapcore.Field {
+	if array, ok := in.Interface.(caddyhttp.LoggableStringArray); ok {
+		newArray := make(caddyhttp.LoggableStringArray, len(array))
+		for i, s := range array {
+			newArray[i] = f.processString(s)
+		}
+		in.Interface = newArray
+	} else {
+		in.String = f.processString(in.String)
+	}
+
+	return in
+}
+
+// processString applies all regexp operations to a single string with input validation.
+func (f *MultiRegexpFilter) processString(s string) string {
+	// Security: validate input string length to prevent resource exhaustion
+	const maxInputLength = 1000000 // 1MB max input size
+	if len(s) > maxInputLength {
+		// Log warning but continue processing (truncated)
+		s = s[:maxInputLength]
+	}
+
+	result := s
+	for _, op := range f.Operations {
+		// Each regexp operation is applied sequentially
+		// Using RE2 engine which is safe from ReDoS attacks
+		result = op.regexp.ReplaceAllString(result, op.Value)
+
+		// Ensure result doesn't exceed max length after each operation
+		if len(result) > maxInputLength {
+			result = result[:maxInputLength]
+		}
+	}
+	return result
+}
+
+// AddOperation adds a single regexp operation to the filter with validation.
+// This is used when merging multiple RegexpFilter instances.
+func (f *MultiRegexpFilter) AddOperation(rawRegexp, value string) error {
+	// Security checks
+	if len(f.Operations) >= maxRegexpOperations {
+		return fmt.Errorf("cannot add operation: maximum %d operations allowed", maxRegexpOperations)
+	}
+
+	if rawRegexp == "" {
+		return fmt.Errorf("regexp pattern cannot be empty")
+	}
+
+	if len(rawRegexp) > maxPatternLength {
+		return fmt.Errorf("regexp pattern too long: %d characters (maximum %d)", len(rawRegexp), maxPatternLength)
+	}
+
+	f.Operations = append(f.Operations, regexpFilterOperation{
+		RawRegexp: rawRegexp,
+		Value:     value,
+	})
+	return nil
+}
+
 // RenameFilter is a Caddy log field filter that
 // renames the field's key with the indicated name.
 type RenameFilter struct {
@@ -664,6 +881,7 @@ var (
 	_ LogFieldFilter = (*CookieFilter)(nil)
 	_ LogFieldFilter = (*RegexpFilter)(nil)
 	_ LogFieldFilter = (*RenameFilter)(nil)
+	_ LogFieldFilter = (*MultiRegexpFilter)(nil)
 
 	_ caddyfile.Unmarshaler = (*DeleteFilter)(nil)
 	_ caddyfile.Unmarshaler = (*HashFilter)(nil)
@@ -673,9 +891,12 @@ var (
 	_ caddyfile.Unmarshaler = (*CookieFilter)(nil)
 	_ caddyfile.Unmarshaler = (*RegexpFilter)(nil)
 	_ caddyfile.Unmarshaler = (*RenameFilter)(nil)
+	_ caddyfile.Unmarshaler = (*MultiRegexpFilter)(nil)
 
 	_ caddy.Provisioner = (*IPMaskFilter)(nil)
 	_ caddy.Provisioner = (*RegexpFilter)(nil)
+	_ caddy.Provisioner = (*MultiRegexpFilter)(nil)
 
 	_ caddy.Validator = (*QueryFilter)(nil)
+	_ caddy.Validator = (*MultiRegexpFilter)(nil)
 )

modules/logging/filters_test.go

@@ -1,6 +1,8 @@
 package logging
 
 import (
+	"fmt"
+	"strings"
 	"testing"
 
 	"go.uber.org/zap/zapcore"
@@ -239,3 +241,198 @@ func TestHashFilterMultiValue(t *testing.T) {
 		t.Fatalf("field entry 1 has not been filtered: %s", arr[1])
 	}
 }
+
+func TestMultiRegexpFilterSingleOperation(t *testing.T) {
+	f := MultiRegexpFilter{
+		Operations: []regexpFilterOperation{
+			{RawRegexp: `secret`, Value: "REDACTED"},
+		},
+	}
+	err := f.Provision(caddy.Context{})
+	if err != nil {
+		t.Fatalf("unexpected error provisioning: %v", err)
+	}
+
+	out := f.Filter(zapcore.Field{String: "foo-secret-bar"})
+	if out.String != "foo-REDACTED-bar" {
+		t.Fatalf("field has not been filtered: %s", out.String)
+	}
+}
+
+func TestMultiRegexpFilterMultipleOperations(t *testing.T) {
+	f := MultiRegexpFilter{
+		Operations: []regexpFilterOperation{
+			{RawRegexp: `secret`, Value: "REDACTED"},
+			{RawRegexp: `password`, Value: "HIDDEN"},
+			{RawRegexp: `token`, Value: "XXX"},
+		},
+	}
+	err := f.Provision(caddy.Context{})
+	if err != nil {
+		t.Fatalf("unexpected error provisioning: %v", err)
+	}
+
+	// Test sequential application
+	out := f.Filter(zapcore.Field{String: "my-secret-password-token-data"})
+	expected := "my-REDACTED-HIDDEN-XXX-data"
+	if out.String != expected {
+		t.Fatalf("field has not been filtered correctly: got %s, expected %s", out.String, expected)
+	}
+}
+
+func TestMultiRegexpFilterMultiValue(t *testing.T) {
+	f := MultiRegexpFilter{
+		Operations: []regexpFilterOperation{
+			{RawRegexp: `secret`, Value: "REDACTED"},
+			{RawRegexp: `\d+`, Value: "NUM"},
+		},
+	}
+	err := f.Provision(caddy.Context{})
+	if err != nil {
+		t.Fatalf("unexpected error provisioning: %v", err)
+	}
+
+	out := f.Filter(zapcore.Field{Interface: caddyhttp.LoggableStringArray{
+		"foo-secret-123",
+		"bar-secret-456",
+	}})
+	arr, ok := out.Interface.(caddyhttp.LoggableStringArray)
+	if !ok {
+		t.Fatalf("field is wrong type: %T", out.Interface)
+	}
+	if arr[0] != "foo-REDACTED-NUM" {
+		t.Fatalf("field entry 0 has not been filtered: %s", arr[0])
+	}
+	if arr[1] != "bar-REDACTED-NUM" {
+		t.Fatalf("field entry 1 has not been filtered: %s", arr[1])
+	}
+}
+
+func TestMultiRegexpFilterAddOperation(t *testing.T) {
+	f := MultiRegexpFilter{}
+	err := f.AddOperation("secret", "REDACTED")
+	if err != nil {
+		t.Fatalf("unexpected error adding operation: %v", err)
+	}
+	err = f.AddOperation("password", "HIDDEN")
+	if err != nil {
+		t.Fatalf("unexpected error adding operation: %v", err)
+	}
+	err = f.Provision(caddy.Context{})
+	if err != nil {
+		t.Fatalf("unexpected error provisioning: %v", err)
+	}
+
+	if len(f.Operations) != 2 {
+		t.Fatalf("expected 2 operations, got %d", len(f.Operations))
+	}
+
+	out := f.Filter(zapcore.Field{String: "my-secret-password"})
+	expected := "my-REDACTED-HIDDEN"
+	if out.String != expected {
+		t.Fatalf("field has not been filtered correctly: got %s, expected %s", out.String, expected)
+	}
+}
+
+func TestMultiRegexpFilterSecurityLimits(t *testing.T) {
+	f := MultiRegexpFilter{}
+
+	// Test maximum operations limit
+	for i := 0; i < 51; i++ {
+		err := f.AddOperation(fmt.Sprintf("pattern%d", i), "replacement")
+		if i < 50 {
+			if err != nil {
+				t.Fatalf("unexpected error adding operation %d: %v", i, err)
+			}
+		} else {
+			if err == nil {
+				t.Fatalf("expected error when adding operation %d (exceeds limit)", i)
+			}
+		}
+	}
+
+	// Test empty pattern validation
+	f2 := MultiRegexpFilter{}
+	err := f2.AddOperation("", "replacement")
+	if err == nil {
+		t.Fatalf("expected error for empty pattern")
+	}
+
+	// Test pattern length limit
+	f3 := MultiRegexpFilter{}
+	longPattern := strings.Repeat("a", 1001)
+	err = f3.AddOperation(longPattern, "replacement")
+	if err == nil {
+		t.Fatalf("expected error for pattern exceeding length limit")
+	}
+}
+
+func TestMultiRegexpFilterValidation(t *testing.T) {
+	// Test validation with empty operations
+	f := MultiRegexpFilter{}
+	err := f.Validate()
+	if err == nil {
+		t.Fatalf("expected validation error for empty operations")
+	}
+
+	// Test validation with valid operations
+	err = f.AddOperation("valid", "replacement")
+	if err != nil {
+		t.Fatalf("unexpected error adding operation: %v", err)
+	}
+	err = f.Provision(caddy.Context{})
+	if err != nil {
+		t.Fatalf("unexpected error provisioning: %v", err)
+	}
+	err = f.Validate()
+	if err != nil {
+		t.Fatalf("unexpected validation error: %v", err)
+	}
+}
+
+func TestMultiRegexpFilterInputSizeLimit(t *testing.T) {
+	f := MultiRegexpFilter{
+		Operations: []regexpFilterOperation{
+			{RawRegexp: `test`, Value: "REPLACED"},
+		},
+	}
+	err := f.Provision(caddy.Context{})
+	if err != nil {
+		t.Fatalf("unexpected error provisioning: %v", err)
+	}
+
+	// Test with very large input (should be truncated)
+	largeInput := strings.Repeat("test", 300000) // Creates ~1.2MB string
+	out := f.Filter(zapcore.Field{String: largeInput})
+
+	// The input should be truncated to 1MB and still processed
+	if len(out.String) > 1000000 {
+		t.Fatalf("output string not truncated: length %d", len(out.String))
+	}
+
+	// Should still contain replacements within the truncated portion
+	if !strings.Contains(out.String, "REPLACED") {
+		t.Fatalf("replacements not applied to truncated input")
+	}
+}
+
+func TestMultiRegexpFilterOverlappingPatterns(t *testing.T) {
+	f := MultiRegexpFilter{
+		Operations: []regexpFilterOperation{
+			{RawRegexp: `secret.*password`, Value: "SENSITIVE"},
+			{RawRegexp: `password`, Value: "HIDDEN"},
+		},
+	}
+	err := f.Provision(caddy.Context{})
+	if err != nil {
+		t.Fatalf("unexpected error provisioning: %v", err)
+	}
+
+	// The first pattern should match and replace the entire "secret...password" portion
+	// Then the second pattern should not find "password" anymore since it was already replaced
+	out := f.Filter(zapcore.Field{String: "my-secret-data-password-end"})
+	expected := "my-SENSITIVE-end"
+	if out.String != expected {
+		t.Fatalf("field has not been filtered correctly: got %s, expected %s", out.String, expected)
+	}
+}

modules/logging/netwriter.go

@@ -172,7 +172,7 @@ func (reconn *redialerConn) Write(b []byte) (n int, err error) {
 	reconn.connMu.RUnlock()
 	if conn != nil {
 		if n, err = conn.Write(b); err == nil {
-			return
+			return n, err
 		}
 	}
 
@@ -184,7 +184,7 @@ func (reconn *redialerConn) Write(b []byte) (n int, err error) {
 	// one of them might have already re-dialed by now; try writing again
 	if reconn.Conn != nil {
 		if n, err = reconn.Conn.Write(b); err == nil {
-			return
+			return n, err
 		}
 	}
 
@@ -198,7 +198,7 @@ func (reconn *redialerConn) Write(b []byte) (n int, err error) {
 		if err2 != nil {
 			// logger socket still offline; instead of discarding the log, dump it to stderr
 			os.Stderr.Write(b)
-			return
+			return n, err
 		}
 		if n, err = conn2.Write(b); err == nil {
 			if reconn.Conn != nil {
@@ -211,7 +211,7 @@ func (reconn *redialerConn) Write(b []byte) (n int, err error) {
 		os.Stderr.Write(b)
 	}
 
-	return
+	return n, err
 }
 
 func (reconn *redialerConn) dial() (net.Conn, error) {

sigtrap_posix.go

@@ -18,6 +18,7 @@ package caddy
 
 import (
 	"context"
+	"errors"
 	"os"
 	"os/signal"
 	"syscall"
@@ -48,7 +49,31 @@ func trapSignalsPosix() {
 				exitProcessFromSignal("SIGTERM")
 
 			case syscall.SIGUSR1:
-				Log().Info("not implemented", zap.String("signal", "SIGUSR1"))
+				logger := Log().With(zap.String("signal", "SIGUSR1"))
+				// If we know the last source config file/adapter (set when starting
+				// via `caddy run --config <file> --adapter <adapter>`), attempt
+				// to reload from that source. Otherwise, ignore the signal.
+				file, adapter, reloadCallback := getLastConfig()
+				if file == "" {
+					logger.Info("last config unknown, ignored SIGUSR1")
+					break
+				}
+				logger = logger.With(
+					zap.String("file", file),
+					zap.String("adapter", adapter))
+				if reloadCallback == nil {
+					logger.Warn("no reload helper available, ignored SIGUSR1")
+					break
+				}
+				logger.Info("reloading config from last-known source")
+				if err := reloadCallback(file, adapter); errors.Is(err, errReloadFromSourceUnavailable) {
+					// No reload helper available (likely not started via caddy run).
+					logger.Warn("reload from source unavailable in this process; ignored SIGUSR1")
+				} else if err != nil {
+					logger.Error("failed to reload config from file", zap.Error(err))
+				} else {
+					logger.Info("successfully reloaded config from file")
+				}
 
 			case syscall.SIGUSR2:
 				Log().Info("not implemented", zap.String("signal", "SIGUSR2"))

usagepool.go

@@ -106,7 +106,7 @@ func (up *UsagePool) LoadOrNew(key any, construct Constructor) (value any, loade
 		}
 		upv.Unlock()
 	}
-	return
+	return value, loaded, err
 }
 
 // LoadOrStore loads the value associated with key from the pool if it
@@ -134,7 +134,7 @@ func (up *UsagePool) LoadOrStore(key, val any) (value any, loaded bool) {
 		up.Unlock()
 		value = val
 	}
-	return
+	return value, loaded
 }
 
 // Range iterates the pool similarly to how sync.Map.Range() does:
@@ -191,7 +191,7 @@ func (up *UsagePool) Delete(key any) (deleted bool, err error) {
 				upv.value, upv.refs))
 		}
 	}
-	return
+	return deleted, err
 }
 
 // References returns the number of references (count of usages) to a