Firewall App Blocker (FAB) is a simple program that makes it easy to add application based blocking rules to the Windows Firewall configuration.Instead of having to go through the Control Panel and Advanced Firewall Settings to create a new blocking rule, you can simple drag-n drop the executable (or a shortcut) you want to block onto the FAB interface, and the it will automatically create a blocking rule for you.Firewall App Blocker is a standalone application that only needs to be launched when you want to add (or disable) any new blocking rules - it does not add any additional features or layers to the Windows Firewall.