From owner-freebsd-questions  Wed Jun  9  8:43:18 1999
Delivered-To: freebsd-questions@freebsd.org
Received: from obie.softweyr.com (unknown [204.68.178.33])
	by hub.freebsd.org (Postfix) with ESMTP
	id 78D6B15038; Wed,  9 Jun 1999 08:43:08 -0700 (PDT)
	(envelope-from wes@softweyr.com)
Received: from softweyr.com (homer.softweyr.com [204.68.178.39])
	by obie.softweyr.com (8.8.8/8.8.8) with ESMTP id JAA06439;
	Wed, 9 Jun 1999 09:43:04 -0600 (MDT)
	(envelope-from wes@softweyr.com)
Message-ID: <375E8B87.84A47C9D@softweyr.com>
Date: Wed, 09 Jun 1999 09:43:03 -0600
From: Wes Peters <wes@softweyr.com>
Organization: Softweyr LLC
X-Mailer: Mozilla 4.5 [en] (X11; U; FreeBSD 3.1-RELEASE i386)
X-Accept-Language: en
MIME-Version: 1.0
To: hqy2446 <hqy2446@is2.nyu.edu>
Cc: freebsd-questions@FreeBSD.ORG, freebsd-security@FreeBSD.ORG
Subject: Re: newbie question: ssh
References: <Pine.OSF.3.95.990608025653.13286A-100000@is2.nyu.edu>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Sender: owner-freebsd-questions@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

hqy2446 wrote:
> 
> I have a newbie question regarding X connection forward by ssh.
> 
> After I installed ssh-1.2.27 and ssh-2.0.13, I was unable to use 'X
> connection forwarding' at certain servers.  Now I tried this command:
> 
> $ ssh -l [username] [remote host] xterm -display [my ip address]:0.0

No no no no!  Watch:

	wes@homer$ echo $DISPLAY
	:0.0
	wes@homer$ ssh freefall.cdrom.com
	Enter passphrase for RSA key 'wes@homer': 
	...
	bash-2.02$ echo $DISPLAY
	freefall.freebsd.org:12.0
	bash-2.02$ /usr/X11R6/bin/xdpyinfo 
	name of display:    freefall.freebsd.org:12.0
	version number:    11.0
	vendor string:    The XFree86 Project, Inc
	vendor release number:    3330

Homer is my laptop running FreeBSD.  As you can see, when I login
to freefall via ssh, a secure X proxy connection has already been
setup for my by ssh.  It will do this if it finds the $DISPLAY
variable set on the client side.  Use this connection and only this
connection for secure transport.  Your command should be:

	$ ssh -l [username] [remote host] xterm

and nothing more.  

	$ ssh -l username remotehost env

will allow you to determine that the remote $DISPLAY is being set
correctly.

-- 
       "Where am I, and what am I doing in this handbasket?"

Wes Peters                                                 Softweyr LLC
http://www.softweyr.com/~softweyr                      wes@softweyr.com


To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-questions" in the body of the message