WIndows 2000 Server Terminal Services Time Outs

I have a Windows 2000 server set up to run a split Access application for 10 users, who connect via the Internet. Their user accounts are set up on a separate server, the site's DC, and their TS profile and session settings in TS configuration and each individual user account are all set to NEVER time out for disconnected sessions, active sessions, or idle sessions.

All users are experiencing time outs on a regular basis. 3 of the users need to stay on all day, every day, and they get kicked out 3-4 times a day, and cannot get back in unless the server is rebooted, as their session stays active, causing us to go over our allotment of sessions for the 10 licenses.  We do have 12 users currently accessing the system, but not concurrently. (Are there any known instances where a user connecting would randomly kick off a connected user? )

Event viewer does not have any message that appears to be related to this problem, and the server performance appears to be adequate.

Does anyone have any ideas as to what would cause this, or how it can be resolved ?

Thank you,
EBM

emoss2000PresidentAsked:
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Dean ChafeeConnect With a Mentor IT/InfoSec ManagerCommented:
I think you may be dealing with more than one issue here.
  1) what is causing the session timeout/network connectin loss
  2) how to get the user to reconnect to their previous session, which will fix the license issue.

There is a know problem with W2k TS that causes a session to stay in an active state (as opposes to disconnected) after loss of network connection.
Please see this link and follow instructions. This will fix problem #2:
http://support.microsoft.com/default.aspx?scid=kb;en-us;216783&Product=win2000

Now for problem 1... how are users connecting?  Via VPN? If so what firewall and network appliances are involved?
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emoss2000PresidentAuthor Commented:
I applied the registry addition as suggested, and the server now correctly resets any user that becomes disconnected for any reason.
All my users are connecting via the Internet using the standard TS port. They come out of their sites via Westell DSL modems or Motorola Cable modems, all having a SonicWall TZ170 at their sites, then into a Westell DSL modem, then a TZ170 (at the server site), configured to pass the standard TS/RDC port.

EBM


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emoss2000PresidentAuthor Commented:
Just to clarify, we are not currently using VPN ...
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Dean ChafeeIT/InfoSec ManagerCommented:
Glad to hear that the registry fix corrects the reset issue... that should help a bunch.
The preferred method for a TS connect would be via VPN.  It's not a good idea to have the TS port open to the world, in fact, I wonder if port scans to the TS port could be causing disconnects.
I do know that considerable latency and/or packet loss will cause a TS disconnect.  I suggest you set up a latency monitor from your network to the users network to detect this.
The best (and Free) latency monitor is SmokePing:
http://oss.oetiker.ch/smokeping/
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emoss2000PresidentAuthor Commented:
I'll set this up and start monitoring tomorrow.... Thanks for your help with this.
I'll post the results late tomorrow or Weddnesday am.....

EBM
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