Windows 11 sometimes treats your connection as "Public" without asking.
If the local firewall isn't the issue, your router is likely blocking the connection. GameRanger requires to be open. gameranger firewall problem windows 11
If you've changed many settings and nothing works: Windows 11 sometimes treats your connection as "Public"
the same process for GameRanger.exe inside the Games subfolder if you host older games. browse to the GameRanger installation folder
If it isn't listed, click , browse to the GameRanger installation folder, and select GameRanger.exe . The Real Culprit: Port 16000
A common point of confusion is that GameRanger connects successfully (green ping), but the actual game fails to start or disconnects immediately after launching.
This is the primary fix.