Ok so I am following this how to in order to set up remote access through a vnc server so that I can connect to my home pc from my windows xp work pc.
So my question is simple, how do i enable XDMCP in ubuntu 11.04?
as possible x11vnc server instructions.. as unity desktop has replaced gdm/gnome I do not know when the unity X11 desktop start up script is located - not certain I can start the x11vnc server after the X11 starts so I can see the whole log in screen and log in as a user.
Has anyone managed to get to that stage and can provide some instructions?
Ok stop. Are you wanting to use VNC or XDMCP?
They are two different things. VNC is a remote display protocol, it merely streams the console display to another server. XDMCP is the protocol you use when your running a X display server on a client (Xming for example) and want to remotely connect a session. We use XDMCP with Solaris 10 extensively where I work at.
You need to enable XDMCP inside whatever display manager your using, for us it's inside the gdm.conf file for Gnome. You also need to enable remote login and ensure TCP port 177 is open and accessible.
A few notes though, XDMCP is not encrypted. The screen data is being sent without any attempt at securing it, so any listening entity could see what your doing. It's not meant to be used over an unsecured network like the internet. Works great for remotely manageing servers in a data center, provided your office is inside the same data center. Otherwise you need to tunnel the X display through a SSH session, which is a little harder to setup.