248 lines
7.5 KiB
Plaintext
248 lines
7.5 KiB
Plaintext
---
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title: Forward auth
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---
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Using forward auth uses your existing reverse proxy to do the proxying, and only uses the
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authentik outpost to check authentication and authoirzation.
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To use forward auth instead of proxying, you have to change a couple of settings.
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In the Proxy Provider, make sure to use one of the Forward auth modes.
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## Single application
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Single application mode works for a single application hosted on its dedicated subdomain. This
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has the advantage that you can still do per-application access policies in authentik.
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## Domain level
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To use forward auth instead of proxying, you have to change a couple of settings.
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In the Proxy Provider, make sure to use the *Forward auth (domain level)* mode.
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This mode differs from the *Forward auth (single application)* mode in the following points:
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- You don't have to configure an application in authentik for each domain
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- Users don't have to authorize multiple times
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There are however also some downsides, mainly the fact that you **can't** restrict individual
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applications to different users.
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The only configuration difference between single application and domain level is the host you specify.
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For single application, you'd use the domain which the application is running on, and only /akprox
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is redirect to the outpost.
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For domain level, you'd use the same domain as authentik.
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## Nginx
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import Tabs from '@theme/Tabs';
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import TabItem from '@theme/TabItem';
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<Tabs
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defaultValue="standalone-nginx"
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values={[
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{label: 'Standalone nginx', value: 'standalone-nginx'},
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{label: 'Ingress', value: 'ingress'},
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]}>
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<TabItem value="standalone-nginx">
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```
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location /akprox {
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proxy_pass http://*ip of your outpost*:4180;
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error_page 401 = @akprox_signin;
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proxy_set_header X-Forwarded-Host $http_host;
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auth_request_set $auth_cookie $upstream_http_set_cookie;
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add_header Set-Cookie $auth_cookie;
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}
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location @akprox_signin {
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internal;
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add_header Set-Cookie $auth_cookie;
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return 302 /akprox/start?rd=$request_uri;
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}
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location / {
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auth_request /akprox/auth?nginx;
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# All your other options...
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}
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```
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</TabItem>
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<TabItem value="ingress">
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Create a new ingress for the outpost
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```yaml
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apiVersion: networking.k8s.io/v1beta1
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kind: Ingress
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metadata:
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name: authentik-outpost
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spec:
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rules:
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- host: *external host that you configured in authentik*
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http:
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paths:
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- backend:
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serviceName: authentik-outpost-*uuid of the service generated by authentik*
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servicePort: 4180
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path: /akprox
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```
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This ingress handles authentication requests, and the sign-in flow.
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Add these annotations to the ingress you want to protect
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```yaml
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metadata:
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annotations:
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nginx.ingress.kubernetes.io/auth-url: https://*external host that you configured in authentik*/akprox/auth?nginx
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nginx.ingress.kubernetes.io/auth-signin: https://*external host that you configured in authentik*/akprox/start?rd=$escaped_request_uri
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nginx.ingress.kubernetes.io/auth-response-headers: X-Auth-Username,X-Forwarded-Email,X-Forwarded-Preferred-Username,X-Forwarded-User
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nginx.ingress.kubernetes.io/auth-snippet: |
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proxy_set_header X-Forwarded-Host $http_host;
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```
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</TabItem>
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</Tabs>
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## Traefik
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<Tabs
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defaultValue="standalone-traefik"
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values={[
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{label: 'Standalone traefik', value: 'standalone-traefik'},
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{label: 'docker-compose', value: 'docker-compose'},
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{label: 'Ingress', value: 'ingress'},
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]}>
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<TabItem value="standalone-traefik">
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```yaml
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http:
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middlewares:
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authentik:
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forwardAuth:
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address: http://authentik-outpost-*uuid of the service generated by authentik*:4180/akprox/auth?traefik
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trustForwardHeader: true
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authResponseHeaders:
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- Set-Cookie
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- X-Auth-Username
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- X-Forwarded-Email
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- X-Forwarded-Preferred-Username
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- X-Forwarded-User
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routers:
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default-router:
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rule: "Host(`*external host that you configured in authentik*`)"
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middlewares:
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- name: authentik
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priority: 10
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services: # Unchanged
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default-router-auth
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match: "Host(`*external host that you configured in authentik*`) && PathPrefix(`/akprox/`)"
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priority: 15
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services: http://*ip of your outpost*:4180/akprox
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```
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</TabItem>
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<TabItem value="docker-compose">
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```yaml
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version: '3.7'
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services:
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traefik:
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image: traefik:v2.2
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container_name: traefik
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volumes:
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- /var/run/docker.sock:/var/run/docker.sock
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labels:
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traefik.enable: true
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traefik.http.routers.api.rule: Host(`traefik.example.com`)
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traefik.http.routers.api.entrypoints: https
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traefik.http.routers.api.service: api@internal
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traefik.http.routers.api.tls: true
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ports:
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- 80:80
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- 443:443
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command:
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- '--api'
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- '--log=true'
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- '--log.level=DEBUG'
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- '--log.filepath=/var/log/traefik.log'
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- '--providers.docker=true'
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- '--providers.docker.exposedByDefault=false'
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- '--entrypoints.http=true'
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- '--entrypoints.http.address=:80'
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- '--entrypoints.http.http.redirections.entrypoint.to=https'
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- '--entrypoints.http.http.redirections.entrypoint.scheme=https'
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- '--entrypoints.https=true'
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- '--entrypoints.https.address=:443'
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authentik_proxy:
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image: ghcr.io/goauthentik/proxy:2021.5.1
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ports:
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- 4180:4180
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- 4443:4443
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environment:
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AUTHENTIK_HOST: https://your-authentik.tld
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AUTHENTIK_INSECURE: "false"
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AUTHENTIK_TOKEN: token-generated-by-authentik
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labels:
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traefik.enable: true
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traefik.port: 4180
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traefik.http.routers.authentik.rule: Host(`*external host that you configured in authentik*`) && PathPrefix(`/akprox/`)
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traefik.http.routers.authentik.entrypoints: https
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traefik.http.routers.authentik.tls: true
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traefik.http.middlewares.authentik.forwardauth.address: http://authentik_proxy:4180/akprox/auth?traefik
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traefik.http.middlewares.authentik.forwardauth.trustForwardHeader: true
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traefik.http.middlewares.authentik.forwardauth.authResponseHeaders: Set-Cookie,X-Auth-Username,X-Forwarded-Email,X-Forwarded-Preferred-Username,X-Forwarded-User
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restart: unless-stopped
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whoami:
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image: containous/whoami
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labels:
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traefik.enable: true
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traefik.http.routers.whoami.rule: Host(`*external host that you configured in authentik*`)
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traefik.http.routers.whoami.entrypoints: https
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traefik.http.routers.whoami.tls: true
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traefik.http.routers.whoami.middlewares: authentik@docker
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restart: unless-stopped
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```
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</TabItem>
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<TabItem value="ingress">
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Create a middleware:
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```yaml
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apiVersion: traefik.containo.us/v1alpha1
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kind: Middleware
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metadata:
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name: authentik
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spec:
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forwardAuth:
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address: http://authentik-outpost-*uuid of the service generated by authentik*:4180/akprox/auth?traefik
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trustForwardHeader: true
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authResponseHeaders:
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- Set-Cookie
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- X-Auth-Username
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- X-Forwarded-Email
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- X-Forwarded-Preferred-Username
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- X-Forwarded-User
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```
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Add the following settings to your IngressRoute
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```yaml
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spec:
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routes:
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- kind: Rule
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match: "Host(`*external host that you configured in authentik*`)"
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middlewares:
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- name: authentik
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priority: 10
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services: # Unchanged
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- kind: Rule
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match: "Host(`*external host that you configured in authentik*`) && PathPrefix(`/akprox/`)"
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priority: 15
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services:
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- kind: Service
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name: authentik-outpost-*uuid of the service generated by authentik*
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port: 4180
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```
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</TabItem>
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</Tabs>
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