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Date:	Thu, 26 May 2011 16:39:39 +0100
From:	Jon TURNEY <jon DOT turney AT dronecode DOT org DOT uk>
Reply-To:	cygwin AT cygwin DOT com
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To:	cygwin AT cygwin DOT com
CC:	Andrew DOT DeFaria AT tellabs DOT com
Subject:	Re: Can't talk to X server through ssh tunnel after ~ 18 minutes
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On 26/05/2011 00:47, Andrew DeFaria wrote:
> On 5/25/2011 11:01 AM, Tim Daneliuk wrote:
>> On 5/25/2011 12:43 PM, Andrew DeFaria said this:
>>> I ssh from my Cygwin box to a Linux machine (happens with Solaris machines
>>> too) and I can run X applications back to Cygwin/X without a problem.
>>> However, after a few minutes something happens to the tunnel and I can no
>>> longer put up any X windows:
>> What arguments are you using to start the ssh session?
> The only argument is -X. Like I said, I was able to put up X windows through
> the ssh tunnel. Then, after some, it stops working - consistently.

I'd guess this is something to do with an untrusted xauth cookie with a 20
minute timeout being generated, although exactly how that can happen if you
are using an X server without the SECURITY extension (as Cygwin/X servers have
been built for the past couple of years), I don't quite understand.

See 'ForwardX11Timeout' in 'man ssh_config'

Use 'ssh -Y'

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