RDP problems over Netscreen 5GT
Posted on 2009-04-09
In one of our offices we have two completely separate networks (due to business reasons this has to be the case), Network A & Network B. Between the two networks I have placed a Netscreen 5GT to allow some traffic to pass between the two. Some users from Network A need to RDP to a server in Network B.
The RDP session kicks off fine and allows the user to connect to the sever, however, after only a few seconds the session disconnects. Some of these users are on XP, others are on thin client Winterms.
I can run a constant ping from A to B without any drops. Going in the opposite direction, ping is also constant and Citrix works flawlessly. Unfortunately there are no Citrix farms on Network B so it has to be RDP into the terminal sever.
Users on Network B can RDP into the server without any problems. So it appears to me that the problem lies in the Netscreen, but I open to all suggestions.
I did wonder if it could be a problem with MTU size. I tried reducing it to 1300 on the Netscreen but it made no difference. I have seen in some places that the MTU needs to be set on the client machine, but as some of the users are on Winterm thin clients, I don't think this can be configured. But I fully admit I know very little about MTU so I am open to any suggestions.