RDP Session gets lost when inactive for some time

Hi,

i use ZDB for more than a year for many remote workers to connect to a
Windows Terminal Server with RDP protocol.

The problem i have from the first day is that if the user does not work with
the RDP Client for about more than 2 minutes the RDP session is broken. The
user has to reconnect manualy. 

I have no idea which part of the communication stack is responsible for
this. Is it the ZBD tunnel? Is it the RDP protocol (but i have the same
experience with 2 other VNC servers tunneling via ZBD).

On the server side i see an error in the zbd-logfile after reconnecting that
there was an error:
ERROR: failed communicating with remote client
But this error message occurs a few lines after the logs of the manually
performed reconnection.

I know for sure that the DSL line was not disconnected and therefor is not
responsible for this.

Is there an timeout in the ZBD tunnel?

Any hints?
Thanks
Mike

-- 
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