[vox-tech] can't open display with ssh2

[vox-tech@lists.lugod.org]

On Thu, Feb 06, 2003 at 11:23:47AM -0800, Ken Bloom wrote:
> > ---ORIGINAL MESSAGE--- 
> > Date: Thu, 06 Feb 2003 12:54:29 -0500
> > From: msimons@moria.simons-clan.com
> > Subject: Re: [vox-tech] can't open display with ssh2
> > 
> > On Wed, Feb 05, 2003 at 10:34:54AM -0800, Robin Snyder wrote:
> >   Also note no changes to any files in /etc are needed to get X forwarding
> > working on a Debian system, the -X option does what is needed.
> 
> That is PATENTLY not true if Debian is the server. If Debian is the 
> server, then you NEED to turn X forwarding on in /etc/ssh/sshd_config

Ken,

  You are correct.  The current woody ssh _requires_ root to make changes to 
/etc/ssh/sshd_config on the side receiving the connection in order for the
server to do its part to setup X11 forwarding (which allows client -X option 
to work).

  When I said changes would just turn on forwarding of X to hosts that
weren't desired, I was thinking of the ForwardX11 option which is
in /etc/ssh/ssh_config which is a different issue.

  I did some tests here and there is no different in debug messages
(even with -vvv) between when X11 forwarding is allowed and disallowed 
on the server side... the main noticeable difference is DISPLAY is not 
set on the remote side.

  So checking sshd_config on the server side is very important.

    Sorry about the error,
      Mike

> I've configured sshd on Debian before.

ps:
  I don't know how long ago in the past but editing sshd_config didn't 
used to be required to forward X connections on debian... -X was not
even needed on the ssh client command... things change over time.