Redirect *.domain.com to error-pages when 404

[owpac]

Hello!

The title should be pretty clear. I've tried everything to redirect a subdomain to error-pages when Traefik respond with 404. But nothing is working.

What I'm trying is: https://random-subdomain.domain.com --> custom 404 page from error-pages

Here is my current setup (which is working for traefik.domain.com/random, for instance):

services:
  traefik:
    container_name: traefik
    env_file:
      - .env
    image: traefik:latest
    labels:
      traefik.enable: true
      traefik.http.routers.traefik.tls: true
      traefik.http.routers.traefik.rule: Host(`traefik.domain.com`)
      traefik.http.routers.traefik.entrypoints: websecure
      traefik.http.routers.traefik.tls.certresolver: letsencrypt
      traefik.http.routers.traefik.service: api@internal
    networks:
      - reverse-proxy
    restart: unless-stopped
    volumes:
      - ./letsencrypt:/letsencrypt
      - ./config:/etc/traefik
      - ./log:/var/log/
      - /var/run/docker.sock:/var/run/docker.sock:ro

  error-pages:
    container_name: error-pages
    depends_on:
      - traefik
    environment:
      TEMPLATE_NAME: hacker-terminal
    image: tarampampam/error-pages:latest
    networks:
      - reverse-proxy
    labels:
      traefik.enable: true
      # use as "fallback" for any NON-registered services (with priority below normal)
      traefik.http.routers.error-pages.rule: HostRegexp(`{host:.+}`)
      traefik.http.routers.error-pages.priority: 10
      traefik.http.routers.error-pages.tls: true
      traefik.http.routers.error-pages.entrypoints: web, websecure
      
      # "errors" middleware settings
      traefik.http.middlewares.error-pages.errors.status: 400-599
      traefik.http.middlewares.error-pages.errors.service: error-pages
      traefik.http.middlewares.error-pages.errors.query: /{status}.html

      # define service properties
      traefik.http.routers.error-pages.service: error-pages
      traefik.http.services.error-pages.loadbalancer.server.port: 8080
    restart: unless-stopped

networks:
  reverse-proxy:
    external: true

Any clue is welcomed! 🙏

[dima-bzz]

You need to add middleware for traefik traefik.http.routers.traefik.middlewares: error-pages

https://github.com/tarampampam/error-pages?tab=readme-ov-file#-integrations-with-traefik-nginx-kubernetes-and-more

[owpac]

Maybe there's a misunderstanding here — when I refer to https://random-subdomain.domain.com, I mean a URL that doesn't point to any existing service. That's why I want to display a custom 404 from error-pages.

[dima-bzz]

Does the request for this url go to traefik?

[owpac]

Yes (10.10.10.2 is my Traefik service):

$ curl -vk https://invalid.domain.com/
* Host invalid.domain.com:443 was resolved.
* IPv6: (none)
* IPv4: 10.10.10.2
*   Trying 10.10.10.2:443...
* Connected to invalid.domain.com (10.10.10.2) port 443
* ALPN: curl offers h2,http/1.1
* (304) (OUT), TLS handshake, Client hello (1):
* (304) (IN), TLS handshake, Server hello (2):
* (304) (IN), TLS handshake, Unknown (8):
* (304) (IN), TLS handshake, Certificate (11):
* (304) (IN), TLS handshake, CERT verify (15):
* (304) (IN), TLS handshake, Finished (20):
* (304) (OUT), TLS handshake, Finished (20):
* SSL connection using TLSv1.3 / AEAD-CHACHA20-POLY1305-SHA256 / [blank] / UNDEF
* ALPN: server accepted h2
* Server certificate:
*  subject: CN=domain.com
*  start date: Jun 14 13:18:39 2025 GMT
*  expire date: Sep 12 13:18:38 2025 GMT
*  issuer: C=US; O=Let's Encrypt; CN=R10
*  SSL certificate verify ok.
* using HTTP/2
* [HTTP/2] [1] OPENED stream for https://invalid.domain.com/
* [HTTP/2] [1] [:method: GET]
* [HTTP/2] [1] [:scheme: https]
* [HTTP/2] [1] [:authority: invalid.domain.com]
* [HTTP/2] [1] [:path: /]
* [HTTP/2] [1] [user-agent: curl/8.7.1]
* [HTTP/2] [1] [accept: */*]
> GET / HTTP/2
> Host: invalid.domain.com
> User-Agent: curl/8.7.1
> Accept: */*
>
* Request completely sent off
< HTTP/2 404
< content-type: text/plain; charset=utf-8
< x-content-type-options: nosniff
< content-length: 19
< date: Wed, 02 Jul 2025 07:39:24 GMT
<
404 page not found
* Connection #0 to host invalid.domain.com left intact

However, for some reason that I don't understand, I don't have the logs Caught HTTP Status Code 404, returning error page middlewareName=error-pages@docker middlewareType=CustomError about this request in Traefik 🤔

[dima-bzz]

#275

[owpac]

@dima-bzz Thank you very much, it's working now. 🙏