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RE: Can't get ssh to forward X packets


Jeff,

I too ran into this problem and finally found the answer.

SecureCRT is probably doing the samething your doing and that is setting
the DISPLAY before ssh'ing to your system.  You can also use PuTTy which
I truly love.  I can do anything with PuTTy that I can with SecureCRT
and its Free.

Todd C. Bowden 
HP Certified 
AtosOrigin 
5000 S. Bowen 
Arlington, TX 76017 
Office: 817-264-8211
E-mail: Todd.Bowden@atosorigin.com


-----Original Message-----
From: Jeff Nokes [mailto:jeff_nokes@yahoo.com] 
Sent: Friday, July 11, 2003 3:08 PM
To: Todd Bowden; cygwin@cygwin.com
Subject: RE: Can't get ssh to forward X packets


Thanks for the reply Todd.  Here's what I found:

Before changing anything:
- There was still no $DISPLAY set on the remote host after logging in.
No change in behavior, X still not forwarding.


After setting a local DISPLAY in my Cygwin ennvironment, I then tried
the follwoing, and it worked, but I did get an xauth data warning:
jnokes@D-SJC-JNOKES ~ $ ssh -X jnokes@row-cm
Warning: No xauth data; using fake authentication data for X11
forwarding. [jnokes@row-cm jnokes]$ echo $DISPLAY localhost:10.0
[jnokes@row-cm jnokes]$
- I ran a test with xeyes and it worked fine.


Thanks for the solution.  I'm now intrigued as to why I needed this,
never have in the past, and it alwyas just worked fine.  And what is
SecureCRT doing "under-the-hood" to make it work without any visible
warnings that Cygwin ssh is not doing?


Thanks again for the help.
- Jeff


--- Todd Bowden <todd@stembol.com> wrote:
> The problem is on the client side.
> 
> Before you ssh to your other systems export DISPLAY=localhost:0
> 
> Than try and ssh into Linux systems.
> 
> Test:
> 1.  Before changing anything ssh into Linux system.  What does 
> $DISPLAY say? 2.  After changing display on client side, What does 
> $DISPLAY say?
> 
> Todd C. Bowden
> HP Certified 
> AtosOrigin 
> 5000 S. Bowen 
> Arlington, TX 76017 
> Office: 817-264-8211
> E-mail: Todd.Bowden@atosorigin.com
> 
> 
> -----Original Message-----
> From: Jeff Nokes [mailto:jeff_nokes@yahoo.com]
> Sent: Friday, July 11, 2003 2:41 PM
> To: cygwin@cygwin.com
> Subject: Can't get ssh to forward X packets
> 
> 
> Hi,
> My name is Jeff.  I recently started a new job that gave me a Win2K 
> box to ssh into the various unix environments to do my work.  The box 
> came with SecureCRT on it, and it works fine.  I prefer to use the 
> cygwin environment so I set it up on my workstation, and it seems to 
> work fine as well, except for two issues, one of which is the question

> of this posting.
> 
> Whenever I ssh into my dev linux boxes, wishing to have X packets 
> forwarded back to my local Xserver on my workstation, it doesn't seem 
> to be working through ssh on Cygwin.  It does, however, work with 
> SecureCRT.  I just set up Cygwin in June, so all the packages are 
> up-2-date.  And I've been using it for a long time at other jobs, and 
> at home, and the X forwarding via ssh always works, but not this time.

> I've even tried re-installing the ssh package, but no changes.  When 
> looking at the verbose output, no mention of X forwarding at all.  I 
> know I'm doing it correctly:
>    ssh -X username@host
> ... and I do log in successfully, but there's never a $DISPLAY 
> variable set on the remote host, as there should be.  When I check 
> $DISPLAY when logging in with SecureCRT, I can see it just fine, and X

> forwards perfectly.  So, the OpenSSH server is not the issue.  I've 
> even tried setting my ~/.ssh/config file to have 'ForwardX11 yes', 
> still nothing. I've tried it using interactive and passive logins, 
> etc., still no change.
> 
> The older versions of Cygwin I've ran in the past always forwarded X 
> seamlessly, not sure why the most recent install won't.  Anyone have 
> any ideas?
> 
> Thanks in advance,
> - Jeff
> 
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