I have Fedora Core 3, and use gdm
I just follow the Procedure http://en.tldp.org/HOWTO/XDMCP-HOWTO...dure.html#PREP
but I had to change the:
ipchains -A input -p udp -i $extint --dport 177 -j ACCEPT
iptables -I INPUT -p udp -i <YourEthInterface> --dport 177 -j ACCEPT
That step is very messed up, sometimes is better to Include than to Append...
I don't have ftp nor telnet on my server, I use SSH for remote console, so I skipped any ftp telnet stuff...
Once I finished the procedure and got my server on init 5 (check your /var/log/messages to see if it started ok) I went to my Windows machine with Cygwin/X and run:
Xwin -query 192.168.0.1
Xwin :<display number> -query 192.168.0.1
and that was it, I got my gdm login screen...
this is pretty cool!! and better than VNC...