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https://support.microsoft.com/en-us/windows/turn-microsoft-defender-firewall-on-or-off...

To turn Microsoft Defender Firewall on or off: Select the Start button > Settings > Update & Security > Windows Security and then Firewall & network protection . Open Windows Security settings. Select a network profile. Under Microsoft Defender Firewall, switch the setting to On. If your device is connected to a network, network policy settings ...

https://support.microsoft.com/en-us/windows/firewall-network-protection-in-windows...

Firewall & network protection in Windows Security lets you view the status of Microsoft Defender Firewall and see what networks your device is connected to. You can turn Microsoft Defender Firewall on or off and access advanced Microsoft Defender Firewall options for the following network types: Domain (workplace) networks

https://support.microsoft.com/en-us/office/what-is-a-firewall-6870c88d-69b6-4db4-9cb1...

A firewall is what controls what is - and more importantly isn't - allowed to pass through those ports. You can think of it like a security guard standing at the door, checking the ID of everything that tries to enter or exit. For most computers - especially regular laptops or desktops - or home networks, the firewall should allow very little ...

https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/...

Windows Defender Firewall with Advanced Security is an important part of a layered security model. By providing host-based, two-way network traffic filtering for a device, Windows Defender Firewall blocks unauthorized network traffic flowing into or out of the local device. Windows Defender Firewall also works with Network Awareness so that it ...

https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-firewall/...

For more on configuring basic firewall settings, see Turn on Windows Firewall and Configure Default Behavior and Checklist: Configuring Basic Firewall Settings.. Understand rule precedence for inbound rules. In many cases, a next step for administrators will be to customize these profiles using rules (sometimes called filters) so that they can work with user apps or other types of software.