A host firewall with Advanced Security offers protection for your device by filtering network traffic and controlling what traffic is allowed to be sent to and from the network.

This document from Microsoft describes how Windows Firewall with Advanced Security works, what the common troubleshooting situations are, and which tools you can use for troubleshooting.

If you want a bit more control without having to use a third-party firewall, fortunately, Windows Defender Firewall actually offers more features than you might expect.

How to or disable the Windows firewall As we just mentioned, the Windows firewall is enabled by default on every Windows 11 PC, and it's enabled for every network type.

Microsoft's newest version of Defender Advanced Threat Protection offers better controls and more insight into security events.