The Windows 7 firewall controls traffic that your computer exchanges with the network or Internet and it uses rules to control this behaviour. A single firewall rule allows you to control how a specific type of network traffic behaves.
The best to way to understand WFAS (Windows Firewall with Advanced Security) is by setting up a test rule as we are going to see in this article. We will configure a firewall rule that accepts only authenticated RDP (Remote Desktop Protocol) connections from hosts on a specific or same subnet:
Windows Firewall and WFAS work together on Windows 7 computers. WFAS allows you to configure inbound and outbound firewall rules based on ports, programs, and services. In addition, it allows you to set a rule scope and authentication. In this article we will see the main configuration elements you need to know when creating firewall rules using the WFAS.