SSTP VPN RRAS disconnects after sometime

knile 41 Reputation points

I have quite strange issue with windows server 2016 RAS Server. I have about 15 clients that connect to it and they get random disconnects after 2 to 3hours and sometimes but not that often it kicks everyone out for a couple of times in 2-3minutes and then it works normal for next couple of hours. Only one machine is left running and it's always same machine that is left running and never kicked out. "Only" difference is that machine is another windows server 2016, all other clients are windows 10 pro clients with latest updates.
There is no errors in event viewer, only event that I'm seeing, which is a warning, is "Specified interface was not present in MGM." on server.
On client side I get 829 error once they are kicked out.
This is how disconnects look on server:

RoutingDomainID- {00000000-0000-0000-0000-000000000000}: CoID={6F984FB1-8145-4E6D-82E3-643616891AD3}: The user domain\user connected on port VPN1-250 on 10/7/2021 at 8:24 PM and disconnected on 10/7/2021 at 8:32 PM. The user was active for 7 minutes 37 seconds. 13459 bytes were sent and 18900 bytes were received. The reason for disconnecting was user request. The tunnel used was WAN Miniport (SSTP). The quarantine state was .

Can anyone point me how can I start troubleshooting this ?
VPN type is SSTP with split tunneling and for authentication EAP MSCHAP2.

This machine is online for last 2years and it just recently (last 2-3months) started acting strange.
Next weekend, I will try to remove the RRAS and add it again to see if that makes any difference.

Any suggestions are appreciated.

Windows Server 2016
Windows Server 2016
A Microsoft server operating system that supports enterprise-level management updated to data storage.
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Accepted answer
  1. Anonymous

    What other roles are installed?

    1 person found this answer helpful.

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