Minecraft Radmin VPN issues after pc upgrade - huge ping spikes, packet loss, and keepalive timeouts
Hi everyone! I really need some help with a strange Minecraft networking issue that my friends and I have been trying to fix for quite a long time.
My friends and I use Radmin VPN to play Minecraft together. It's convenient for us, and everything works perfectly for everyone except one friend.
The problem started after he upgraded his PC.
Originally, whenever he joined my regular Minecraft LAN world through Radmin VPN, his ping would suddenly skyrocket. On my screen, his character would just freeze, while on his screen, chunks wouldn't load, causing him to literally fall into the void. Eventually, he would get disconnected.
At first, we thought the issue was specifically between our two computers. However, we decided to test this by having him connect to another friend's Minecraft world through Radmin VPN, and exactly the same problem occurred.
We also tried playing through Tailscale, and everything worked perfectly fine, even when Radmin VPN wasn't working.
After a lot of troubleshooting, we somehow managed to get regular Minecraft LAN worlds working properly through Radmin VPN.
He can now join my regular Minecraft LAN world and play normally without any issues.
Unfortunately, the problem still exists on my dedicated Minecraft server.
Current situation
I recently set up my own dedicated Minecraft server (Paper 1.21.11) for my friends on a separate computer.
My ISP doesn't provide me with a public IP address, so we use Radmin VPN to connect to the server.
Everyone else can connect and play without any problems.
However, when this particular friend joins, the following happens:
He successfully connects to the server.
He enters his password to authenticate.
His ping suddenly jumps from the usual 60ā70 ms to 200ā350+ ms.
He starts experiencing severe lag and packet loss.
After a short while, the server automatically disconnects him with the following messages:
was kicked due to keepalive timeout
lost connection: Timed out
My friend's PC specifications
CPU: Intel Core i7-12700F
Motherboard: ASUS B760M WiFi
RAM: 32 GB DDR5 (16 GB allocated to Minecraft)
Operating system: Windows 11
Network adapter: Intel Wi-Fi 6E AX211
Additional information
My friend lives in Germany, while I'm in Ukraine.
The issue started after he upgraded his PC.
Radmin VPN normally shows around 60ā70 ms latency when Minecraft isn't running.
Other friends have absolutely no issues connecting to my server.
Other online games, such as CS2, Roblox, etc., work perfectly fine for him.
Regular Minecraft LAN worlds now work normally through Radmin VPN.
When Radmin VPN wasn't working properly with LAN worlds, Tailscale worked perfectly fine.
We would really prefer to continue using Radmin VPN since it's the most convenient option for our group.
Has anyone experienced something similar?
Does anyone have any idea what could be causing this?
Could the problem be related to Radmin VPN itself, his network adapter, Windows 11, packet handling, or something else?
The strangest part is that he can now play in regular Minecraft LAN worlds through Radmin VPN without any issues, but the same problem still occurs when connecting to my dedicated server.
I would really appreciate any advice or suggestions. We've been trying to figure this out for a long time, and we're running out of ideas.
Thanks in advance!