I have tested this on CentOS 5.4 and Fedora 11.
Make the following changes:
To /etc/gdm/custom.conf add:
[daemon]
RemoteGreeter=/usr/libexec/gdmgreeter
[xdmcp]
Enable=true
MaxSessions=30
DisplaysPerHost=1
To /etc/services:
vnc1024 5900/tcp #vnc & gdm @ 1024×768 resolution
vnc800 5901/tcp #vnc & gdm @ 800×600 resolution
Create /etc/xinetd.d/vnc800 with the following:
service vnc800
{
disable = no
socket-type = stream
protocol = tcp
group = tty
wait = no
user = nobody
server = /usr/bin/Xvnc
server_args = -inetd -query localhost -geometry 800×600 -depth 16 -once -fp unix/:7100 -securitytypes=none
}
Create /etc/xinetd.d/vnc1024 with the following:
service vnc1024
{
disable = no
socket-type = stream
protocol = tcp
group = tty
wait = no
user = nobody
server = /usr/bin/Xvnc
server_args = -inetd -query localhost -geometry 1024×768 -depth 16 -once -fp unix/:7100 -securitytypes=none
}
*Turn off vncserver*
We don’t want a vnc server now, so make sure it doesn’t run with
chkconfig –level 2345 vncserver off
And then do the following:
init 3
init 5
chkconfig –level 2345 xinetd on
service xinetd restart
All should be complete.
*Testing*
Use RealVNC or vncviewer to connect to the IP address of the machine you just setup. By default, if you do not specify a display (10.10.10.30:1) the VNC client will connect to display 0 which is the service you setup on port 5900. If you want a display that is 800×600 for the default display then setup the vnc800 service on port 5900.
