If you need to host a game server or use a specific application that requires an open port, follow these steps to create an "Inbound Rule":

tab, the "Listening Ports" section shows every open port and the exact application name associated with it. PowerShell (Advanced): Use the command Get-NetTCPConnection -State Listen for a detailed technical breakdown. How to Open a Port in Windows 11 Firewall

Get-NetTCPConnection -State Listen

This is the preferred method, as it keeps the service running but denies external access.