https://help.ubuntu.com/community/VNC#accessing-your-pc
whatismyip.com is interesting
just run
$vncserver
then on other machines use $vncviewer use ip or hostname to login but need ":1" eg. 10.1.0.84:1 dhcp02.asianux.net:1
but strange thing is I login to a strange kde desktop rather then the normal asianux dektop but anyway X is available, I can run axtu gui here
when I use 250 sever machine, everything is fine