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Date: Fri, 12 Nov 2004 19:50:46 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin-xfree AT cygwin DOT com
To: Nicholas Wisniewski <nw AT ucla DOT edu>
cc: cygwin AT cygwin DOT com, cygwin-xfree AT cygwin DOT com
Subject: Re: Problems with ssh and tunnelling with cygwin 1.5.12
In-Reply-To: <000a01c4c8fd$567cd840$01f2e183@UCLA1>
Message-ID: <Pine.GSO.4.61.0411121908190.269@slinky.cs.nyu.edu>
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On Fri, 12 Nov 2004, Nicholas Wisniewski wrote:

> Hello,
>    I'm trying ssh and tunnel to various machines.  I can ssh just fine
> without tunnelling (i.e. ssh user AT machine DOT net).  When I try to tell ssh
> to tunnel (ssh -X user AT machine DOT net), it prompts me for my password, and
> then hangs.

This is an X-related issue, and as such should go to the cygwin-xfree
list.  I'm redirecting my reply there -- please remove <cygwin at cygwin
dot com> from further discussion.

> When I look at the task manager, I see that sh.exe is taking up all of
                                              ^^^^^^
> the available CPU.  If I kill sh.exe from the task manager, ssh
                                ^^^^^^
> continues fine and I am connected and tunnelling.

Is this really sh.exe?  Can you check whether this sh.exe process is
running before you start ssh (e.g., compare the outputs of "ps -ef" before
and after "ssh -X")?

I don't recall any option that would make ssh start a shell on the local
machine.  Are your ssh config files customized?  Are you running keychain,
or autossh, or any other ssh-related scripts?

Are you running Cygwin's ssh?  Are you running /usr/bin/ssh, or is ssh
aliased to anything?  Is your DISPLAY set when you run ssh.exe?  Have you
tried trusted X forwarding ("ssh -Y")?

>    I'm running XP pro, service pack 2.  I've turned off the XP firewall and
> Sophos virus programs and still get the same behaviour.  The same behavir
> happens on this machine with cygwin 1.5.11 as well.
>
>    Has anybody ever seen this before?

This doesn't sound like anything that's been reported before.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"The Sun will pass between the Earth and the Moon tonight for a total
Lunar eclipse..." -- WCBS Radio Newsbrief, Oct 27 2004, 12:01 pm EDT

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