I am trying to set up a VPN server on Windows Server 2012. I am able to connect to the server locally but not from outside my network ( using my WAN IP address ). The internet on the server works fine until I try to enable passthrough on the router/modem. I enter the MAC address of the NIC on the server and enable passthrough and when the router restarts I no longer have internet connection getting a "Your computer appears to be correctly configured, but the device or resource (www.microsoft.com) is not responding" from the troubleshooter. But when I remove the MAC from passthrough I get internet again. Why is passthrough disabling my internet?