VPN and File Server in singe Windows 2012 R2 (repost from another category)

Hi,

My server has real ip with only one network card. I want to setup a VPN server into my server.

I followed the given link to make the server. https://blog.thesysadmins.co.uk/server-2012-pptp-vpn-with-1-nic.html

But the problem is whenever I connect to VPN, my computer loses internet.

To get it connected, I need to uncheck "use default getaway on remote network" from VPN connection in client side. I don't want to do that. How to resolve the issue?

Thanks,

AdNaN