Connectivity Problem with Minecraft - friends cant join server but i can

System Information

Field Value
Operating System Linux - Debian GNU/Linux 12 on x86_64
Product AMP ‘Callisto’ v2.5.0.12 (Mainline)
Virtualization Docker
Application Minecraft
Module MinecraftModule
Running in Container Yes
Current State Stopped

Problem Description

Issue

I can join my minecraft server.
When my friends try to join, they cannot.
They have enough RAM to run it, storage for it, the correct IP, updated drivers, etc, but cannot join.

Reproduction Steps

  • playing on my server with minor issues (modded)
  • friend attempts to connect
  • friend cannot connect / time out

Best bet would be for you to read the client/server logs to see what’s going on.
If it’s just a timeout issue you can add the arg-Dfml.readTimeout=180 to both their client and the server (google how to add args to their client)

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