Re: Problems with ssh and tunnelling with cygwin 1.5.12

[Igor Pechtchanski <pechtcha at cs dot nyu dot edu>]

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@machine.net).  When I try to tell ssh
> to tunnel (ssh -X user@machine.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
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