In two brand new HP Probooks, the Sonicwall Global VPN suddenly stopped working. The address above is referring to the MAC address of a Virtual NIC created by the Global VPN Client. I have removed the vNIC, completely removed every trace of the client using a utility from Sonicwall. I have changed the MAC address of the vNIC manually. Still, when I re-install the client clean, it does the same thing. I have also Used Admin mode to install and to run the GVPNC. I have contacted, Sonicwall but no real effort at response.