chore(deps): bump docker/build-push-action from 6 to 7 (#749)

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 6 to 7.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](https://github.com/docker/build-push-action/compare/v6...v7)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/dependabot.yml

@@ -24,3 +24,8 @@ updates:
     directory: "/"
     schedule:
       interval: "daily"
+
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/ci.yml

@@ -10,13 +10,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup bun
         uses: oven-sh/setup-bun@v2
 
       - name: Setup go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: "^1.26.0"
 
@@ -56,6 +56,6 @@ jobs:
         run: go test -coverprofile=coverage.txt -v ./...
 
       - name: Upload coverage reports to Codecov
-        uses: codecov/codecov-action@v5
+        uses: codecov/codecov-action@v6
         with:
           token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/nightly.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Delete old release
         run: gh release delete --cleanup-tag --yes nightly || echo release not found
@@ -33,7 +33,7 @@ jobs:
       BUILD_TIMESTAMP: ${{ steps.metadata.outputs.BUILD_TIMESTAMP }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: nightly
 
@@ -51,7 +51,7 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: nightly
 
@@ -59,7 +59,7 @@ jobs:
         uses: oven-sh/setup-bun@v2
 
       - name: Install go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: "^1.26.0"
 
@@ -94,7 +94,7 @@ jobs:
           CGO_ENABLED: 0
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: tinyauth-amd64
           path: tinyauth-amd64
@@ -106,7 +106,7 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: nightly
 
@@ -114,7 +114,7 @@ jobs:
         uses: oven-sh/setup-bun@v2
 
       - name: Install go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: "^1.26.0"
 
@@ -149,7 +149,7 @@ jobs:
           CGO_ENABLED: 0
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: tinyauth-arm64
           path: tinyauth-arm64
@@ -161,7 +161,7 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: nightly
 
@@ -176,22 +176,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/amd64
@@ -213,7 +213,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-linux-amd64
           path: ${{ runner.temp }}/digests/*
@@ -228,7 +228,7 @@ jobs:
       - image-build
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: nightly
 
@@ -243,22 +243,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/amd64
@@ -281,7 +281,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-distroless-linux-amd64
           path: ${{ runner.temp }}/digests/*
@@ -295,7 +295,7 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: nightly
 
@@ -310,22 +310,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/arm64
@@ -347,7 +347,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-linux-arm64
           path: ${{ runner.temp }}/digests/*
@@ -362,7 +362,7 @@ jobs:
       - image-build-arm
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: nightly
 
@@ -377,22 +377,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/arm64
@@ -415,7 +415,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-distroless-linux-arm64
           path: ${{ runner.temp }}/digests/*
@@ -429,25 +429,25 @@ jobs:
       - image-build-arm
     steps:
       - name: Download digests
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-*
           merge-multiple: true
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
           flavor: |
@@ -468,25 +468,25 @@ jobs:
       - image-build-arm-distroless
     steps:
       - name: Download digests
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-distroless-*
           merge-multiple: true
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
           flavor: |
@@ -506,7 +506,7 @@ jobs:
       - binary-build
       - binary-build-arm
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           pattern: tinyauth-*
           path: binaries

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
       BUILD_TIMESTAMP: ${{ steps.metadata.outputs.BUILD_TIMESTAMP }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Generate metadata
         id: metadata
@@ -29,13 +29,13 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install bun
         uses: oven-sh/setup-bun@v2
 
       - name: Install go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: "^1.26.0"
 
@@ -70,7 +70,7 @@ jobs:
           CGO_ENABLED: 0
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: tinyauth-amd64
           path: tinyauth-amd64
@@ -81,13 +81,13 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install bun
         uses: oven-sh/setup-bun@v2
 
       - name: Install go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: "^1.26.0"
 
@@ -122,7 +122,7 @@ jobs:
           CGO_ENABLED: 0
 
       - name: Upload artifact
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: tinyauth-arm64
           path: tinyauth-arm64
@@ -133,7 +133,7 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Initialize submodules
         run: |
@@ -146,22 +146,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/amd64
@@ -183,7 +183,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-linux-amd64
           path: ${{ runner.temp }}/digests/*
@@ -197,7 +197,7 @@ jobs:
       - image-build
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Initialize submodules
         run: |
@@ -210,22 +210,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/amd64
@@ -248,7 +248,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-distroless-linux-amd64
           path: ${{ runner.temp }}/digests/*
@@ -261,7 +261,7 @@ jobs:
       - generate-metadata
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Initialize submodules
         run: |
@@ -274,22 +274,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/arm64
@@ -311,7 +311,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-linux-arm64
           path: ${{ runner.temp }}/digests/*
@@ -325,7 +325,7 @@ jobs:
       - image-build-arm
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Initialize submodules
         run: |
@@ -338,22 +338,22 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Build and push
-        uses: docker/build-push-action@v6
+        uses: docker/build-push-action@v7
         id: build
         with:
           platforms: linux/arm64
@@ -376,7 +376,7 @@ jobs:
           touch "${{ runner.temp }}/digests/${digest#sha256:}"
 
       - name: Upload digest
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v7
         with:
           name: digests-distroless-linux-arm64
           path: ${{ runner.temp }}/digests/*
@@ -390,25 +390,25 @@ jobs:
       - image-build-arm
     steps:
       - name: Download digests
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-*
           merge-multiple: true
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
           flavor: |
@@ -431,25 +431,25 @@ jobs:
       - image-build-arm-distroless
     steps:
       - name: Download digests
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-distroless-*
           merge-multiple: true
 
       - name: Login to GitHub Container Registry
-        uses: docker/login-action@v3
+        uses: docker/login-action@v4
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+        uses: docker/setup-buildx-action@v4
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v5
+        uses: docker/metadata-action@v6
         with:
           images: ghcr.io/${{ github.repository_owner }}/tinyauth
           flavor: |
@@ -473,7 +473,7 @@ jobs:
       - binary-build
       - binary-build-arm
     steps:
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           pattern: tinyauth-*
           path: binaries

.github/workflows/sponsors.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Generate Sponsors
         uses: JamesIves/github-sponsors-readme-action@v1

.github/workflows/stale.yml

@@ -7,7 +7,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v9
+      - uses: actions/stale@v10
         with:
           days-before-stale: 30
           stale-pr-message: This PR has been inactive for 30 days and will be marked as stale.

internal/controller/proxy_controller.go

@@ -25,6 +25,15 @@ const (
 	ForwardAuth
 )
 
+type ProxyType int
+
+const (
+	Traefik ProxyType = iota
+	Caddy
+	Envoy
+	Nginx
+)
+
 var BrowserUserAgentRegex = regexp.MustCompile("Chrome|Gecko|AppleWebKit|Opera|Edge")
 
 type Proxy struct {
@@ -38,6 +47,7 @@ type ProxyContext struct {
 	Method    string
 	Type      AuthModuleType
 	IsBrowser bool
+	ProxyType ProxyType
 }
 
 type ProxyControllerConfig struct {
@@ -121,7 +131,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 	}
 
 	if !controller.auth.CheckIP(acls.IP, clientIP) {
-		if !controller.useFriendlyError(proxyCtx) {
+		if !controller.useBrowserResponse(proxyCtx) {
 			c.JSON(401, gin.H{
 				"status":  401,
 				"message": "Unauthorized",
@@ -165,7 +175,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 		if !userAllowed {
 			tlog.App.Warn().Str("user", userContext.Username).Str("resource", strings.Split(proxyCtx.Host, ".")[0]).Msg("User not allowed to access resource")
 
-			if !controller.useFriendlyError(proxyCtx) {
+			if !controller.useBrowserResponse(proxyCtx) {
 				c.JSON(403, gin.H{
 					"status":  403,
 					"message": "Forbidden",
@@ -205,7 +215,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 			if !groupOK {
 				tlog.App.Warn().Str("user", userContext.Username).Str("resource", strings.Split(proxyCtx.Host, ".")[0]).Msg("User groups do not match resource requirements")
 
-				if !controller.useFriendlyError(proxyCtx) {
+				if !controller.useBrowserResponse(proxyCtx) {
 					c.JSON(403, gin.H{
 						"status":  403,
 						"message": "Forbidden",
@@ -256,7 +266,7 @@ func (controller *ProxyController) proxyHandler(c *gin.Context) {
 		return
 	}
 
-	if !controller.useFriendlyError(proxyCtx) {
+	if !controller.useBrowserResponse(proxyCtx) {
 		c.JSON(401, gin.H{
 			"status":  401,
 			"message": "Unauthorized",
@@ -296,7 +306,7 @@ func (controller *ProxyController) setHeaders(c *gin.Context, acls config.App) {
 }
 
 func (controller *ProxyController) handleError(c *gin.Context, proxyCtx ProxyContext) {
-	if !controller.useFriendlyError(proxyCtx) {
+	if !controller.useBrowserResponse(proxyCtx) {
 		c.JSON(500, gin.H{
 			"status":  500,
 			"message": "Internal Server Error",
@@ -312,8 +322,31 @@ func (controller *ProxyController) getHeader(c *gin.Context, header string) (str
 	return val, strings.TrimSpace(val) != ""
 }
 
-func (controller *ProxyController) useFriendlyError(proxyCtx ProxyContext) bool {
+func (controller *ProxyController) useBrowserResponse(proxyCtx ProxyContext) bool {
-	return (proxyCtx.Type == ForwardAuth || proxyCtx.Type == ExtAuthz) && proxyCtx.IsBrowser
+	if !proxyCtx.IsBrowser {
+		return false
+	}
+
+	if proxyCtx.ProxyType == Traefik {
+		return true
+	}
+
+	return false
+}
+
+func (controller *ProxyController) getProxyType(proxy string) (ProxyType, error) {
+	switch proxy {
+	case "traefik":
+		return Traefik, nil
+	case "caddy":
+		return Caddy, nil
+	case "envoy":
+		return Envoy, nil
+	case "nginx":
+		return Nginx, nil
+	default:
+		return 0, fmt.Errorf("unsupported proxy type: %v", proxy)
+	}
 }
 
 // Code below is inspired from https://github.com/authelia/authelia/blob/master/internal/handlers/handler_authz.go
@@ -417,13 +450,13 @@ func (controller *ProxyController) getExtAuthzContext(c *gin.Context) (ProxyCont
 	}, nil
 }
 
-func (controller *ProxyController) determineAuthModules(proxy string) []AuthModuleType {
+func (controller *ProxyController) determineAuthModules(proxy ProxyType) []AuthModuleType {
 	switch proxy {
-	case "traefik", "caddy":
+	case Traefik, Caddy:
 		return []AuthModuleType{ForwardAuth}
-	case "envoy":
+	case Envoy:
 		return []AuthModuleType{ExtAuthz, ForwardAuth}
-	case "nginx":
+	case Nginx:
 		return []AuthModuleType{AuthRequest, ForwardAuth}
 	default:
 		return []AuthModuleType{}
@@ -462,9 +495,15 @@ func (controller *ProxyController) getProxyContext(c *gin.Context) (ProxyContext
 		return ProxyContext{}, err
 	}
 
+	proxy, err := controller.getProxyType(req.Proxy)
+
+	if err != nil {
+		return ProxyContext{}, err
+	}
+
 	tlog.App.Debug().Msgf("Proxy: %v", req.Proxy)
 
-	authModules := controller.determineAuthModules(req.Proxy)
+	authModules := controller.determineAuthModules(proxy)
 
 	if len(authModules) == 0 {
 		return ProxyContext{}, fmt.Errorf("no auth modules supported for proxy: %v", req.Proxy)
@@ -497,5 +536,6 @@ func (controller *ProxyController) getProxyContext(c *gin.Context) (ProxyContext
 	}
 
 	ctx.IsBrowser = isBrowser
+	ctx.ProxyType = proxy
 	return ctx, nil
 }

internal/controller/proxy_controller_test.go

@@ -164,6 +164,32 @@ func TestProxyController(t *testing.T) {
 				assert.Equal(t, 401, recorder.Code)
 			},
 		},
+		{
+			description: "Ensure forward auth fallback for nginx with browser user agent",
+			middlewares: []gin.HandlerFunc{},
+			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) {
+				req := httptest.NewRequest("GET", "/api/auth/nginx", nil)
+				req.Header.Set("x-forwarded-host", "test.example.com")
+				req.Header.Set("x-forwarded-proto", "https")
+				req.Header.Set("x-forwarded-uri", "/")
+				req.Header.Set("user-agent", browserUserAgent)
+				router.ServeHTTP(recorder, req)
+				assert.Equal(t, 401, recorder.Code)
+			},
+		},
+		{
+			description: "Ensure forward auth fallback for envoy with browser user agent",
+			middlewares: []gin.HandlerFunc{},
+			run: func(t *testing.T, router *gin.Engine, recorder *httptest.ResponseRecorder) {
+				req := httptest.NewRequest("HEAD", "/api/auth/envoy?path=/hello", nil)
+				req.Header.Set("x-forwarded-host", "test.example.com")
+				req.Header.Set("x-forwarded-proto", "https")
+				req.Header.Set("x-forwarded-uri", "/hello")
+				req.Header.Set("user-agent", browserUserAgent)
+				router.ServeHTTP(recorder, req)
+				assert.Equal(t, 401, recorder.Code)
+			},
+		},
 		{
 			description: "Ensure normal authentication flow for forward auth",
 			middlewares: []gin.HandlerFunc{