I am on a Windows PC running VirtualBox with Ubuntu installed. I have my networking setup as NAT. On my Windows PC, I am connected to a VPN, but I cannot access those VPN resources from VirtualBox (I have also tried Bridged Networking mode with the same result). Is there a way to connect through the host's VPN? Or alternatively if I could just connect to the VPN through Ubuntu that would work, but I don't see that option in the network connections when running within VirtualBox.
I have had a similar problem. Running Windows 7 (64bit) with Ubuntu 12.04 inside VirtualBox. To work from home, I need to be able to connect to the University network via VPN to be able (in turn) to connect to the University supercomputing cluster.
I couldn't get a VPN client connection from inside Ubuntu, and I was unable to access my Host machine's VPN connect.
What I did was create a new adapter for my Virtual machine, attached to "Host-only Adapter". This showed up under Internet Connections in Windows, and from there I created a bridge between my Cisco VPN adapter and the VirtualBox host-only network.
After doing this, I was able to connect to the VPN host from inside the Ubuntu virtual machine. The Windows side of the VPN connection doesn't like it, but meh.
Hope this helps.