Open the Group Policy Management Console to Windows Firewall
Applies To: Windows 7, Windows Essential Business Server, Windows SBS 2003, Windows SBS 2008, Windows Server 2000, Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2, Windows Server 2008, Windows Server 2008 R2, Windows Vista
To open a GPO to Windows Firewall
Open Active Directory Users and Computers.
In the navigation pane, expand YourDomainName, right-click the container that your GPO is linked to, and then click Properties.
Click the Group Policy tab, select your GPO, and then click Edit.
In the navigation pane of the Group Policy Object Editor, expand Computer Configuration, expand Administrative Templates, expand Network, expand Network Connections, and then expand Windows Firewall.