Xt error:can't open display;ssh not passing $DISPLAY

[Thomas Chadwick]

The sshd server at the remote end also has to be configured to allow X 
forwarding.  It's possible that could be to blame.  There's a switch to 
(dis)allow it in /etc/ssh/sshd_config

By the way, if you are on system "local" and run "ssh -X remote", then the 
correct value of DISPLAY in the resulting terminal should NOT be local:0 or 
something similar. it should look like remote:10 or simply :10.

>From: "John Curran Jr" <jppcurran@earthlink.net>
>Reply-To: jppcurran@earthlink.net
>To: "cygwin-xfree" <cygwin-xfree@cygwin.com>
>Subject: Re: Xt error:can't open display;ssh not passing $DISPLAY
>Date: Fri, 19 Jul 2002 13:6:52 -0400
>
>
>
>
> > [Original Message]
> > From: Harold L Hunt II <huntharo@msu.edu>
> > To: <jppcurran@earthlink.net>
> > Cc: cygwin-xfree <cygwin-xfree@cygwin.com>
>  > Date: 7/18/02 4:59:01 PM
> > Subject: Re: Xt error:can't open display;ssh not passing $DISPLAY
> >
> > John Curran Jr wrote:
> > > Several postings have suggested using secure ssh to display remote
>clients,
> > > and that ssh should handle details such as passing  the $DISPLAY 
>value.
> > > I'm using cygwin version 1.3.11 under Win98(v. 2).  I'm starting my
>server
> > > with startxwin.sh, the first line of which is  "export
> > > DISPLAY=127.0.0.1:0.0".  That value is there when I echo at the local
>shell
> > > in X11.  My ssh_config file is set to allow X11Forwarding.  I'm using
>ssh
> > > to reach a remote unix system.  I can log in but I can't display 
>remote
> > > clients; e.g., I type "xterm &" and get the message "xterm Xt error:
>cannot
> > > open display: ".  And, the variable DISPLAY is empty on the remote
>system.
> > > Am I missing something obvious?
> > >
> > > Below are  cygcheck.out, ssh_config, and startxwin.sh.
> >
> > John,
> >
> > Didn't you think for a moment that something of infinitly more
> > importance than the contents of various config files would be the actual
> > command line that you are using for ssh?
>
>If knew I what I was doing wrong :-)
>
> >
> > Post the command line that you use to ssh to your remote machine.  You
> > do know that you have to run ssh from within an xterm in your
> > Cygwin/XFree86 X server, right?
> >
> > Harold
> >
> >
>
>I am running ssh within an xterm in my Cygwin/XFree86 X server; I have
>tried command lines "ssh -X -l username ip_address", and "ssh -l username
>ip_address",
>the behavior is identical.
>
>--- John Curran
>--- jppcurran@earthlink.net


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