X11: Forwarding X11
(last edit: 2001-05-22)
                   
Introduction
This doument will explain how to export X11 from one machine to the other with OpenSSH. It
is also possible to export X11 without using (Open)SSH but that is a realy insecure way.
If your still planning to do this, take a look at 'xhost'. This document furthermore 
asumes that the server is also running FreeBSD. If it isn't: skip the server side part and
find yourself a X-server for your operating system.

Doing things with OpenSSH
Server side:
*) Make sure a X server is installed and that it is able to start some graphic programs
   like e.g. 'xterm'

*) Edit the OpenSSH server config file '/etc/ssh/sshd_config' and make sure the 
   following line is enabled: 'X11Forwarding yes'.

*) Kill the ssh daemon (MAKE SURE YOU CAN GET IN THE MACHINE VIA SOMETHING LIKE A
   KEYBOARD) and start it again. You can try a 'killall -HUP sshd' but it didn't always
   work (on my server).
  
Client side:
*) set the environmental variable 'DISPLAY' e.g.: 

     user@host:/#export DISPLAY=[server ip]:0.0

*) Edit the OpenSSH client config file '/etc/ssh/ssh_config' and make sure the
   following line is enabled: 'ForwardX11 yes'.


Let's get to work!!!

*) Make a ssh connection to the sever e.g.: 

     user@client:/#ssh user@server

*) Start the program e.g.: 

     user@server:/#xterm

   and xterm should be displayed on the client machine.