I have an issue that I'm at my wits end. For some unknown reason my users suddenly cannot connect through VPN anymore. It's a setup on Server 2012 R2 with a File Server/VPN server and a DC running on Hyper-V.
Nothing to my knowledge has changed in the environment, we haven't even had a work ticket for them in maybe a month. For some reason when you try to VPN in it just sits there for about 3 minutes and the client gets:
error 619: A Connection to the remote computer could not be established, so the port used for this connection was closed.
The server gets error RemoteAccess 20252 on the actual port, so I know the VPN client is hitting the server and then just going nowhere.
Neither of these errors have offered any help. The router has never changed and is still setup properly so it's not the firewall, I can RDP remotely and that works fine. The NegotiateTime is set at 150 which is supposedly the fix for error 20252.
We use Bright House for our ISP and I called and verified they aren't blocking anything.
I have reconfigured and completely reinstalled the RRAS role every way I know how to, it's a single NIC so I use the custom install for RRAS and set it up for VPN. I've tried every NPS policy I can think of, I even copied the Policies settings from NPS on a different client's VPN server and it still doesn't work.
Any help is really appreciated.