ssh reverse tunnel issue

[David Ohlemacher]

Hi all,

I am having a bothersome issue with ssh (maybe) and was wondering if anyone
has an idea what the problem might be.

I am running a reverse ssh tunnel from the west coast to a middle machine in
Nashua, NH.   I need to run some machines on the left coast for some
embedded dev with hardware there.  My machine and the west coast machines
are behind firewalls, hence the need for the rev tunnel. The middle machine
is not behind a router firewall.

>From the west coast machine to the middle machine:

ssh -X -C -R  <tunnel port>:localhost:22   <user>@<middle machine>
// using X, and compression (not sure if the compression helps or not)

I then ssh to middle machine:

ssh -X -C <user>@<middle machine>

and from the middle machine to the west coast:

ssh -X -C  <user>@<west coast machine> -p <tunnel port>

Issue:   It mostly works fine.  I can open X apps, vim, etc.   But I get
momentary freezes.   They last 10 seconds to over a minute.  After, I can
continue my work.    5 or 10 minutes later, it happens again.

I don't think it is the Internet because during freezes not all the windows
do it.    While one window is frozen, I can use 'talk' over the same tunnel
to talk to another developer on the west coast.

Any ideas?

Thanks,
-d
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