ssh reverse tunnel issue

[Andy Bair]

It doesn't seem like you're dropping connections but I generally setup
ssh stanzas in my .ssh/config file and use ServerAliveInterval.  Maybe
that will help keep things active.

Host some_host
	Port <some_port>
	Hostname <some_server_ip>
	ServerAliveInterval 240

Hope that helps.

Andy

On Tue, Apr 05, 2011 at 05:40:59PM -0400, David Ohlemacher wrote:
> 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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-- 
Andy

KoreLogic Security
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