Connectivity Problem with Minecraft - I cannot connect to the server ingame without vpn

System Information

Field Value
Operating System Linux - Debian GNU/Linux 12 on x86_64
Product AMP ‘Phobos’ v2.6.3.2 (Mainline)
Virtualization Docker
Application Minecraft
Module MinecraftModule
Running in Container Yes
Current State Ready

Problem Description

Issue

I installed the latest version of the Beyond Death modpack, and everything worked fine at first. However, about 10 hours later, I suddenly couldn’t join the server anymore without using a VPN — I kept getting a timeout error. When I connected through a VPN, it worked normally. After turning off the VPN, I was able to join the server once without it, but when I tried to join again, it stopped working and timed out again. And other people can join normally but people that are also from my country (germany) cant.

Reproduction Steps

  • Install Beyond Depth on the server
  • join normally, everything works
  • wait until the next day, like 10 hours
  • try to join, it’s not working
  • join the server with vpn

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