If you discover a that shouldn't be open, close it immediately.
Windows 11 automatically uses port 7680 for peer-to-peer sharing of updates with other devices on your local network or internet.
: Search for "Windows Defender Firewall with Advanced Security" in the Start menu and open it. Create Inbound Rule : In the left pane, click Inbound Rules , then select
Understanding the "open ports" on a Windows 11 machine is not simply a matter of running a port scanner; it requires an understanding of the Windows Filtering Platform (WFP), the role of the Network Location Awareness (NLA) service, and the specific services bound to the TCP/IP stack. A default installation of Windows 11 is not a "stealth" machine; it listens on specific ports to facilitate file sharing, device discovery, and remote management.
: The Microsoft Defender Firewall is highly rated for its "Stateful Packet Inspection" (SPI), which monitors all incoming requests to ensure they were actually requested by your apps.
If you see a PID holding a port open and need to know exactly what program it is, you can combine commands to reveal the application name: powershell