Reverse connections

[Helder Guerreiro]

Hi,

I've been using VNC for a while without any problems, but ever since I've 
changed to the latest version 4.1.2 I'm not able to maintain a reverse 
connection for more that a few minutes, and on that time the redrawing of the 
sreen is very slow. However the direct connections are stable and fast.

The setup is has follows:

- I run the VNC listner on a Kubuntu Edgy machine, version 4.1.1, it's the 
latest version available for this OS (tried also on a SuSE 10.0 machine and 
the results are the same);

- The windows machines have installed the free version, 4.1.2;

If I make a ssh tunnel to those machines, I can connect without problems. If I 
ask the user to add me as a new client we have the situation I've just 
described. 

I've issued on the linux machine the following command:

$ vncviewer -log=*:stderr:100 -listen

But the log seems to be normal. The VNC window just freezes after a few 
minutes. For example:

Tue Jan 23 16:51:46 2007
 DesktopWindow: selection (1) time is 1339956271, later 0
 DesktopWindow: selection (272) time is 1334602631, later 0
 DesktopWindow: cut buffer time is 0, later 0

Tue Jan 23 16:52:00 2007
 DesktopWindow: selection (1) time is 1339956271, later 0
 DesktopWindow: selection (272) time is 1334602631, later 0
 DesktopWindow: cut buffer time is 0, later 0

Tue Jan 23 16:52:01 2007
 DesktopWindow: selection (1) time is 1339956271, later 0
 DesktopWindow: selection (272) time is 1334602631, later 0
 DesktopWindow: cut buffer time is 0, later 0

I wasn't able to look at the windows side log. 

The funny thing is that when I had RealVNC 4.1.1 installed on the windows 
machines everything went fine. I have also some users with linux machines and 
when they have a "graphical" problem they use x11vnc to connect to me, no 
problem here either (please note, that this users aren't on the same site as 
the windows ones).

The local network on the remote site is in a very bad shape, 80% of the 
network points have problems, could this be the cause? Is the last version 
somehow less tolerant to the network conditions?

Any ideias?

Thank you,
Helder