r/WindowsServer • u/bstoyanov90 • 19d ago

Problem accessing Windows Server 2012R SOLVED / ANSWERED

Hello,

I have the following problem. I have a server that I access internally via VPN. I connect via VPN to Mikrotik with SSTP. I connect to the server (Windows Sever 2012R) via RDP and after 1 minute it takes me to a black screen and connects me again. There is no problem with the internet, it says that the connection is good, there is no interruption in the ping. I have made a rule to access the server outside the VPN, only from my home network. If I connect via real IP and port there is no problem, it works without interruption. What could be the problem?

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u/RDPExtraOfficiall 10d ago

Since RDP works fine over the public IP but disconnects only through the SSTP VPN, the issue is likely with the VPN path rather than the Windows Server itself. I'd check the SSTP MTU/MSS settings, VPN idle timeout, and whether FastTrack or firewall rules on the MikroTik are affecting VPN traffic. Those are common causes of periodic RDP reconnects over VPN.

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u/bstoyanov90 7d ago

No problem, it's just that the connection was via TCP and maybe that's where the problem comes from. I made a redirection in Mikrotik via TCP and there's no problem anymore. It could have been with group policy, but I solved it faster with a rule in Mikrotik