Hello, I need assistance understanding some of the remote X applications, I have been reading stuff that google finds me, and stuff on this forum, but I am just getting more confused.
I have two systems, and I am able to run the command
vncviewer -fullscreen xxx.xxx.xxx.xxx
to connect from one to the other and control the desktop.
That is nice, but what I would like to do is be able to login from the other computer, instead of just taking over whoever is currently logged in. I thought since vnc was just taking over the screen if I logged out of the host machine, when I vnced to it I would get the log in screen, but I don't I just get told that the connection is refused.
I have enabled remote login in the gdm preferences (I am using gnome). And when I look in the section to configure XDMCP I have taken that port and have my firewall allow that port through.
Then under securit I looked at the Configure X Server section and tried to add a server in addition to the standard one, and hoped it would allows another user to connect, but it didn't, so I removed it. (I didn't really understand what I was doing anyway).
So what I was wondering a few things. First, what is XDMCP, I know it is the X display manager, but what does it do, and how do I make it work, and connect to it from a nother machine. (I have tried XDMCP xxx.xxx.xxx.xxx similar to how I use vncviewer, but the system says it doesn't know the command XDMCP)
Second, if I get a remote user login working, can a user log in remotely if that is the same user that is logged in locally, and will that screw things up?
Third, I would like to have the choice between starting a new session with my remote user (while leaving anyone locally logged in still unchanged), or between taking control of the current logged in user. Is this possible? Could I do this by havin two ports listening, one for remote login, and one for remote control of local user?(and how would I do that)
What do I change in the gnome GDM settings GUI (System-Administration-login Screen) to properly configure the X server?
Thank you for your help, and I am sorry for asking some questions that have already been answered but I didn't understand the responses, so I am asking again hoping that people will use complete and detailed explanations.