Cannot connect via cloudflare tunnel

[johnsturgeon]

First I tried connecting through my existing tunnel, but that did not work, so I've created a new tunnel just for dawarich (and added the tunnel to the compose file).

Here are the relevant changes (let's say my domain is dawarich.somedomain.tld)

dawarich_app:
  environment:
      RAILS_APPLICATION_CONFIG_HOSTS: ""
      APPLICATION_HOSTS: "dawarich.somedomain.tld,''"
dawarich_sidekiq:
  environment:
      RAILS_APPLICATION_CONFIG_HOSTS: ""
      APPLICATION_HOSTS: "dawarich.somedomain.tld,''"
tunnel:
  image: cloudflare/cloudflared:latest
  command: tunnel --no-autoupdate run
  networks:
    - dawarich
  env_file: tunnel.env
  restart: always
  container_name: tunnel
  depends_on:
    - dawarich_app

I'm getting the error:

[faultoverload]

I'm just using a local reverse proxy instead of cloudflare but this is what my APPLICATION_HOSTS setting looks like. 10.0.1.6 is the IP of my nginx proxy.

APPLICATION_HOSTS: localhost,::1,127.0.0.1,10.0.1.6,dawarich.domain.com

[johnsturgeon]

Thank you my friend! That did it. I thought that because I was using a cloudflare tunnel that I had to use the cloudflare instructions, but alas, simply setting it up as a reverse proxy worked great. For me, the trick was that I used the ip of the dawarich host instead of the nginx proxy

[fj-solutions]

Same Problem with Cloudflare Zero Trust Tunnel, following this tutorial.

Here are my changes (assuming my domain is: dawarich.somedomain.tld):

dawarich_app:
  environment:
      RAILS_APPLICATION_CONFIG_HOSTS: ""
      APPLICATION_HOSTS: dawarich.somedomain.tld,''
dawarich_sidekiq:
  environment:
      RAILS_APPLICATION_CONFIG_HOSTS: ""
      APPLICATION_HOSTS: dawarich.somedomain.tld,''
tunnel:
  image: cloudflare/cloudflared:latest
  command: tunnel --no-autoupdate run
  networks:
    - dawarich
  env_file: tunnel.env
  restart: always
  container_name: tunnel
  depends_on:
    - dawarich_app

Same Error aswell:

Output in Console:

dawarich_app      | E, [2025-05-23T06:37:52.518152 #103] ERROR -- : [ActionDispatch::HostAuthorization::DefaultResponseApp] Blocked hosts: 
dawarich_app      | D, [2025-05-23T06:37:52.548143 #103] DEBUG -- :   Rendering layout vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.2/lib/action_dispatch/middleware/templates/rescues/layout.erb
dawarich_app      | D, [2025-05-23T06:37:52.548560 #103] DEBUG -- :   Rendering vendor/bundle/ruby/3.4.0/gems/actionpack-8.0.2/lib/action_dispatch/middleware/templates/rescues/blocked_host.html.erb within rescues/layout

If somebody (maybe @johnsturgeon) could enlighten me, it would be much appreciated.

[johnsturgeon]

If somebody (maybe @johnsturgeon) could enlighten me, it would be much appreciated.

I followed @faultoverload 's advice. Pre-requisite is that I already have a functioning cloudflare tunnel. I added a tunnel subdomain for my desired hostname. I then updated

I went back to default docker compose file, and made the same change they made .. just to the APPLICATION_HOSTS env vars (both of them) to be
APPLICATION_HOSTS: localhost,::1,127.0.0.1,10.0.1.6,<my.fullyqualified.cloudflaredomain.tld>

Restarted everything and it worked.

[tismofied]

Thank you @johnsturgeon . My morning was a bit stressful but much better now lol