Session Terminates

[Cross-Connection]

I have 1-4max remote access clients that keep getting
their terminal server sessions terminated for unknown
reasons. They log back in seconds later, but it's
annoying. There aren't any known limitations to their
sessions. The server shows in task manager that resources
aren't an issue. The sessions terminate at any time.
From having many applications open to having no
applications open. Also all the sessions are terminated
at once or right after each other. Again they can log
back in-even with the other session locked up. Any
suggestions? Thank you for your time.

 

[Matthew Harris [MVP]]

If your users aren't on the lan, then you are most likely
dealing with a few dropped packets every so often which
can be caused by poor network conditions. You might want
to increase your TCPMaxDataRetransmissions value from 5 to
10, since this help. However, you might also want to run
some continuous pings to see if people are being
disconnected when packets are being dropped.

Check out this article:
http://terminal.servebeer.com/php/flaky_connections.php

However, if these people are on your lan and are being
disconnected, then you might want to think about getting
better network hardware and/or network cards in your
terminal server.

-M

 

[Guest]

The remote users are not on the LAN. The line into the
server is a 5mb/512k DSL line and at least one of the
remote sessions are on a 1.5mb/128k DSL connection. Isn't
it really hard to fill those pipelines with data? Is
there anyway to monitor those or is that an ISP question?

Also the NIC is a 3com 10/100 3C905B-TX. My only advanced
options are 802.1p support-disabled, down poll rate 8 or
64-8 selected, flow control-enabled, media type-100Mb
Full, Rx Checksum Offload-enabled, Tx Checksum Offload-
enabled. You think a network card would make a difference?

The crazy thing is I haven't had problems with it before
with this client or another one that is set up the same.
The current remote users are saying it's been this way a
long time. It's worked fine for me for a number of
years. However, my access has usually been short.

I did however, replicate the termination issue today from
my remote office in a short amount of time (within 10
minutes). It seems something has changed - to me anyway.
It does "feel" like a high network utilization would be
the culprit, but filling that super fat pipeline seems
insane.

 

[Matthew Harris [MVP]]

Yes, I would agree that filling those pipelines is rather
difficult, but also realize that DSL does have a higher
than normal (in my experience) latency and packet dropping
percentage as compared to a T1 line. If a dropped packet
occurs at just the right time it can cause some encryption
issues as well as disconnected sessions. You could try
running a consistent ping to see if there are dropped
packets and if those dropped packets correspond to people
being disconnected.

-M