I installed GVC on a windows vista machine. The connection setup perfectly and I was able to connect with the shared secret and login with the user profile. The virtual adapter however, never gets an ip. We do not use a dhcp server. However, I enabled DHCP and created a 3 ip scope on the sonicwall for testing purposes. Virtual Adapter Settings on the sonicwall device is set for dhcp lease. DHCP over VPN has been configured. I selected Central Gateway and checked of use internal DHCP Server and checked of For global VPN Client.