Xvnc terminal server

Install vnc server and xinetd

yum -y install vnc-server xinetd

Configure xinetd:

chkconfig xinetd on

Create /etc/xinetd.d/xvncserver

service vnc-640x480x8
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 640x480 -depth 8 -SecurityTypes none
}

service vnc-800x600x8
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 800x600 -depth 8 -SecurityTypes none
}

service vnc-1024x768x8
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1024x768 -depth 8 -SecurityTypes none
}

service vnc-1280x1024x8
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1280x1024 -depth 8 -SecurityTypes none
}

service vnc-1600x1200x8
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1600x1200 -depth 8 -SecurityTypes none
}

service vnc-640x480x16
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 640x480 -depth 16 -SecurityTypes none
}

service vnc-800x600x16
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 800x600 -depth 16 -SecurityTypes none
}

service vnc-1024x768x16
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1024x768 -depth 16 -SecurityTypes none
}

service vnc-1280x1024x16
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1280x1024 -depth 16 -SecurityTypes none
}

service vnc-1600x1200x16
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1600x1200 -depth 16 -SecurityTypes none
}

service vnc-640x480x24
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 640x480 -depth 24 -SecurityTypes none
}

service vnc-800x600x24
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 800x600 -depth 24 -SecurityTypes none
}

service vnc-1024x768x24
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1024x768 -depth 24 -SecurityTypes none
}

service vnc-1280x1024x24
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1280x1024 -depth 24 -SecurityTypes none
  # port = 5973
}

service vnc-1600x1200x24
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1600x1200 -depth 24 -SecurityTypes none
}

service vnc-640x480x32
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 640x480 -depth 32 -SecurityTypes none
}

service vnc-800x600x32
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1600x1200 -depth 24 -SecurityTypes none
}

service vnc-640x480x32
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 640x480 -depth 32 -SecurityTypes none
}

service vnc-800x600x32
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 800x600 -depth 32 -SecurityTypes none
}

service vnc-1024x768x32
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1024x768 -depth 32 -SecurityTypes none
}

service vnc-1280x1024x32
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1280x1024 -depth 32 -SecurityTypes none
}

service vnc-1600x1200x32
{
  protocol = tcp
  socket_type = stream
  wait = no
  user = nobody
  server = /usr/bin/Xvnc
  server_args = -inetd -query localhost -once -geometry 1600x1200 -depth 32 -SecurityTypes none
}

Add ports to /etc/services:

#
# VNC Servers
#
vnc-640x480x8 5950/tcp
vnc-800x600x8 5951/tcp
vnc-1024x768x8 5952/tcp
vnc-1280x1024x8 5953/tcp
vnc-1600x1200x8 5954/tcp
  
vnc-640x480x16 5960/tcp
vnc-800x600x16 5961/tcp
vnc-1024x768x16 5962/tcp
vnc-1280x1024x16 5963/tcp
vnc-1600x1200x16 5964/tcp
  
vnc-640x480x24 5970/tcp
vnc-800x600x24 5971/tcp
vnc-1024x768x24 5972/tcp
vnc-1280x1024x24 5973/tcp
vnc-1600x1200x24 5974/tcp
  
vnc-640x480x32 5980/tcp
vnc-800x600x32 5981/tcp
vnc-1024x768x32 5982/tcp
vnc-1280x1024x32 5983/tcp
vnc-1600x1200x32 5984/tcp

Allow XDMCP in gdm, by editing /etc/gdm/custom.conf:

[security]
DisallowTCP=false

[xdmcp]
Enable=true
HonorIndirect=false

OK now start everything up:

service xinetd start

And bounce Xorg (you may need to change runlevels):

init 3
init 5