virtualbox.org

If you set up a VPN connection on the Host, then it's quite possible that the routing changed during the VM operation. When that happens, all you have to do is refresh the IP address inside the Guest and the whole routing is renewed to make it work again. Do know that any traffic from the VM goes through the VPN connection.
To make it easier to refresh the IP configuration on the Guest, I suggest you get the network icon back by commenting the added lines. Else you need to run dhclient as root from a terminal when you loose connection.

Sasquatch wrote:Do know that any traffic from the VM goes through the VPN connection.

I only recently became aware of this - that traffic from the host goes through the VPN. (Oops.)
Thanks again for the help with this one.