I've running a Windows 7 guest under VirtualBox. If (and only if) I run a VPN client such as Viscosity or the OpenVPN client, after about 20 minutes, they both stop working and it turns out that my Windows guest has lost complete connectivity (not just DNS, you can't even ping anything via IP address) to the network, even to local LAN.
Quiting the VPN client makes no difference, I find I have to reboot the Windows guest to get it working again.
Anyone have any idea why this might be happening and how to fix it?
Thanks
tracert google.com
tracert 8.8.4.4
ipconfig /all
route print
before the connectivity problem occur AND after it occur