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TorGuard posted a topic in Member TutorialsHow to create VPN Killswitch with Windows 7/8/10 Firewall Stop leaks when VPN disconnects. Introduction Having troubles with your VPN disconnecting and exposing your true IP address(es)? With the Windows firewall you can eliminate accidental leakage. What's the difference between TorGuards VPN Client killswitch and a Firewall killswitch? Simple, the client disables your main network interface, while the firewall simply blocks all traffic without disabling any network interface. The main problem with any third party application that disables your network adapter is when the VPN connection is terminated, there is a very small window where your IP address can be leaked. Let's not forget to mention that if the client cannot disable the adapter, perhaps due to: security suite, permissions, or when a malfunctioning operating system interferes. A firewall, especially Windows Firewall will have minimum chances of failure if configured correctly; it is arguably the best firewall for Windows in my opinion. Requirements: TorGuard VPN Client Windows (Tested with 7/8/10) No third-party firewall Step 1: Setting main network adapter from Public to Private Step 2: Open Windows Firewall with Advanced Security Step 3: Backup Current Firewall Policy Step 4: Create Outbound Rule Step 5: Block all Connections for Private/Domain Step 6: Giving internet permission to applications manually Final Notes + WARNINGS If you ever get a firewall popup to add program, make sure to uncheck Private networks and only have Public networks checked before clicking Allow access; If you fail to monitor this, the killswitch will be pointless. Never allow any program to automatically add firewall exceptions. You should only do this manually or whenever you get prompted by Windows Firewall. This isn't a setup and forget solution. Existing firewall rules that are assigned the Private/Domain network spaces will be able to still connect, usually it's just local network related stuff. It would be good if you reviewed all rules and adjust them accordingly to your needs.