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Network Security Secure-Shell
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Re: X11 forwarding and DISPLAY variable

from [Derek Martin] Network Security [Permanent Link]
Subject: Re: X11 forwarding and DISPLAY variable
Date: Fri, 14 Oct 2005 11:55:13 -0400 
On Thu, Oct 13, 2005 at 09:57:35AM -0700, Kelly Lucas wrote:

On the machine where you want to display X, as the user you logged in 
as, type:

xhost +


No no no no no no no!  You don't need to do this with OpenSSH, EVER!
SSH uses the much better MIT-MAGIC-COOKIE method of authenticating X
protocol connections, and does not need to muck with host-based X
authentication.


This will give permission to remote clients to display on it.


Yes, it will give permission to ALL remote clients to access your
desktop, which is most certainly not what you want.


When you SSH, try using:

ssh -X <hostname>


This is all you need.  If this solves the problem, you can do it
automatically by putting

  ForwardX11=yes

in your /etc/ssh/ssh_config file, or (if you don't have root access to
your machine) in your personal $HOME/.ssh/config file.

-- 
Derek D. Martin
http://www.pizzashack.org/
GPG Key ID: 0x81CFE75D

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