What is a VPN Kill Switch?
A VPN Kill Switch completely shuts off your Internet access when the connection to your VPN is dropped. A VPN firewall takes the concept of a VPN Kill Switch further by actively blocking traffic from leaking outside of your encrypted tunnel. A VPN firewall like Liquid Lock is better than a VPN Kill Switch because it blocks DNS and IP leaks.
Liquid Lock Introduction
The Best VPN Kill Switches are Liquid Lock and Comodo Firewall
The new LiquidVPN client features Liquid Lock which does the same thing the Comodo firewall VPN kill switch found here does except it is much easier. This page is here for users that are not using the LiquidVPN client or that do not have LiquidVPN.