[CentOS] How to export X displays

[techlists at comcast.net]

 -------------- Original message ----------------------
From: Ow Mun Heng <Ow.Mun.Heng at wdc.com>
> n Wed, 2007-10-10 at 02:14 +0000, techlists at comcast.net wrote:
> > I have a CentOS server at home and want to view the X display on a laptop 
> running Ubuntu, and not having much success.
> > 
> > Here's what's been tried so far:
> > 
> > I ran this command on the CentOS server:
> > 
> > export DISPLAY=192.168.0.18:0.0 
> 
> 
> ssh -X -Y centos
> 
> xclock &

I tried that and am getting this error message. Just ran an nmap scan on 192.168.0.18 and the X server port doesn't appear to be open. How is that enabled?

connect 192.168.0.18 port 6000: Connection refused

Paul