Firewalla Gold Plus + Cloudflare Tunnels "Response code mismatch error"

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William Callahan

• October 11, 2024 19:27
• Edited

I've got several Cloudflare tunnels setup to access hosts remotely, but devices behind my Firewalla consistently report health issues to Cloudflare that devices behind other firewalls do not. 

"Response code mismatch error" for the endpoint is indicated, although I'm not sure this is specific/indicative enough. This particular tunnel is serving web traffic from a Docker container.

It's reachable, but causes regular health issues, causing a lot of other issues. 

Any ideas on potential causes/solutions?

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  Firewalla

  • October 11, 2024 19:38

  Are you using DoH or Unbound? 

  Is the container running inside the firewalla or outside?

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  William Callahan

  • October 11, 2024 19:56

  Thanks for the quick reply @Firewalla. Unbound and DNS over HTTPS are currently disabled. 

  The Docker container is running on a machine inside the Firewalla Gold Plus device. 

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  Firewalla

  • October 11, 2024 22:13

  If your container is inside the network, and I assume cloud flair tunnel is encrypted, I don't see any way firewalla can impact the traffic. 

  May be you can try to turn on emergency access on the docker container box, and see if it will make any difference. 

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  William Callahan

  • October 11, 2024 22:17
  • Edited

  Yeah, I enabled emergency access yesterday in an effort to fix this, but no luck.

  Can you think of anything else that could cause this? I'm not having the same issue with an identical Docker container running simultaneously in the same way on other machines outside the Firewalla.

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  Firewalla

  • October 12, 2024 01:50

  If your tunnel is encrypted, then there is no way firewalla can influence what is going inside of it. So, very likely the issue may be related to the tunnel and what's being connected to the tunnel 

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