The feature provides traffic filtering functionality similar to that of the SBC 2000 through the Access Control List feature and provides the same ability to provide layer-3 filtering.
The ASM Firewall feature functions in concert with the native Windows Firewall on the ASM, supplementing the built-in Windows Firewall rules with custom rules defined using this feature. For more information about how the Windows Firewall operates and how rules are applied, see the Managing Windows Firewall with Advanced Security section on the Microsoft Technet site.
To enable the ASM Windows firewall:
In the left navigation pane, go to Application Solution Module > ASM Configuration.
ASM Configuration