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.
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.