If the connection to the VPN will break then everywhere will display your real ip-address. To avoid this and block any non-VPN connection you need to add a rule to the firewall. How to do it consider the example Comodo Firewall (link on official website).
Install Comodo and run. In main window...
Name : Kai
Nick Name : KaiWren
From : USA
City : somewhere in AZ
Sex : Male
Hobbies : Carding, cashing, hacking, and r/c helicopters
i Got This Site From ? google, duh...
Looking forward to finding some solid people to work with, if anyone needs a cashier in the US, hit me...