Download Firewall App Blocker (Fab) v1.9 – Block Any App from Accessing the Internet

Firewall App Blocker (Fab) v1.9 is a free portable utility that makes it easy to block any application from accessing the internet using the Windows Firewall. Instead of navigating through complex firewall settings, Fab provides a simple drag-and-drop interface where you can add any executable file and block its inbound or outbound internet access with one click.

The tool works entirely through the Windows built-in firewall engine, so no third-party drivers or services are installed. This means it is lightweight, compatible with all versions of Windows, and leaves no lasting changes beyond the firewall rules themselves — which you can remove just as easily.

Fab is ideal for blocking telemetry from applications, preventing specific programs from phoning home, stopping games or software from requiring internet access, or simply controlling which apps on your machine can reach the internet.

Key Features

• Drag-and-drop interface to add applications and block their internet access instantly
• Block inbound traffic, outbound traffic, or both for any executable
• Works through Windows Firewall — no third-party drivers or services needed
• Portable application — no installation required, runs from any folder
• Whitelist mode to block all applications except those you explicitly allow
• View and manage all firewall rules created by Fab in one place
• Compatible with Windows 7, 8, 10, and 11

How to Install

1. Click the download button above to save the Firewall App Blocker v1.9 archive to your computer.
2. Extract the ZIP file to a folder of your choice — no installation is needed.
3. Run Fab.exe as Administrator to ensure it can modify Windows Firewall rules.
4. Drag and drop any application executable onto the Fab window to block its internet access.
5. To unblock an app, select it in the list and click the Remove button.