Connectivity Problem with Minecraft - Unable to connect to server from any account

System Information

Field Value
Operating System Linux - Ubuntu 24.04.3 on x86_64
Product AMP ‘Phobos’ v2.6.4.0 (Mainline)
Virtualization None
Application Minecraft
Module MinecraftModule
Running in Container No
Current State Ready

Problem Description

Issue

Server address suddenly doesnt work after no changes to anything (not even a restart). I was setting up a voice-chat port and finally had it work. After about half an hour of the server being up and running I logged out and tried relogging in with no success and have been troubleshooting for hours. Doesnt matter who or what account tries to join.

Reproduction Steps

  • Left the server online for 30 minutes?
  • Set up the server with the world and mods
  • Was troubleshooting voicechat for hours and finally got simple voicechat to work
  • Finally, after about 30 minutes of the server up and running I logged out and havent been able to have any account connect since.