Template:Fail Closed Mechanism
A general problem with VPNs is that during a connection, they often fail to remain open. This means the VPN connection is closed and the user is now directly connected to the Internet without first tunneling through the VPN. This is not a Whonix-specific problem. VPN servers and software can occasionally fail without prior notice. Therefore, if the VPN is unreachable or the connection breaks down for whatever reason, in most cases you will continue to connect to the internet without the VPN.
One of the key benefits of Whonix is that when a VPN connection fails, you will still have the protections provided by Tor. In this instance, the Whonix-Workstation will seamlessly continue to make "direct" connections through Tor. Failure of the VPN tunnel may be inconsequential if you are only using a VPN to circumvent Tor censorship. On the other hand, if you believe a VPN improves your security, then you should make sure that if/when the VPN connection fails, all connections with the outside world and your computer cease.