Connectivity Problem with Project Zomboid - Server failed to respond when trying to join

System Information

Field Value
Operating System Linux - Ubuntu 20.04.6 on x86_64
Product AMP ‘Callisto’ v2.5.0.4 (Mainline)
Virtualization None
Application Project Zomboid
Module GenericModule
Running in Container No
Current State Stopped

Problem Description

Issue

I cant connect to the server. I open the game with steam and get “server is not responding”. The ports all show green on the dashboard except there’s an “idk” port that is red. Not sure what this means.

Reproduction Steps

  • Use “steam port” with "steam relay’ to connect
  • Try using domain name or raw IP
  • Admin account or normal user
  • TCP and UDP ports all forwarded. Showing green circles in dashboard. (Except for the “idk” one)

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