We have a Windows 2008 server on Amazon's EC2 hosted cloud and we need to use the PPTP client in Windows to connect back to our office's internal network. The Internet works fine when the PPTP vpn is not connected and when the VPN client is connected. However, as soon as the client is disconnected, all network traffic to that machine stops. The only way to fix it is to use the EC2 control panel to reboot the server. I ran some scripts that give me the IPconfig information and routing information for that server which I've attached. It seems to me that the default route is disappearing but the route to the VPN network stays when the VPN is disconnected. How do I fix this problem?