Hello,
we have windows 2008R2 sp1 terminalserver, all running on windows 2008R2 SP1 hyper-v server.
On every terminalserver i get the following eventlog entry daily multiple times (between 3-8 times):
The Terminal Server security layer detected an error in the protocol stream and has disconnected the client. Client IP: xx.x.xx.x
Log Name: System
Source: TermDD
EventID: 56
Our users are sometimes disconnected from the session when they are working on the terminalserver. Most users are using RemoteApps.
Users have installed RDP 7 on windows xp or windows 7 clients.
Users are working on the same LAN as the terminalserver or with vpn access (site to site vpn, ipsec).
Both users, on lan and vpn, are affected.
So it looks not like a VPN problem. Also the users are not disconnected same time. I have tried updating the nic driver on some pc, no effect.
I have tried to add a regkey for EnablePMTUBHDetect under hklm\system\CurrentControlSet\Services\TCPIP\Parameters\
Maybe somebody can help us?
Maybe somebody has similar problems? we are using for the vpn sonicwall devices, but, the problem seems also to exist on LAN without VPN....
Regards