You can also use IPsec to require that certain network traffic is encrypted to prevent it from being read by network packet analyzers that could be attached to the network by a malicious user. When authentication is required, devices that can't be authenticated as a trusted device can't communicate with your device.

Windows Defender Firewall also supports Internet Protocol security (IPsec), which you can use to require authentication from any device that is attempting to communicate with your device. Windows Defender Firewall in Windows 8, Windows 7, Windows Vista, Windows Server 2012, Windows Server 2008, and Windows Server 2008 R2 is a stateful host firewall that helps secure the device by allowing you to create rules that determine which network traffic is permitted to enter the device from the network and which network traffic the device is allowed to send to the network.

Overview of Windows Defender Firewall with Advanced Security This topic is an overview of the Windows Defender Firewall with Advanced Security (WFAS) and Internet Protocol security (IPsec) features.

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