Virtualization - Step 2 Setting up Remote Access via X (Xdmcp)

To make life easy for myself I want to be able to access the Linux server from my desktop using KDM. This is incredibly easy to set up, yet difficult to find out how to set it up. Again, my first stop was Google where I found any number of Xdmcp HOWTOs but these all talked about xdm and gdm but said very little about kdm. And the little that was mentioned was wrong.

On Slackware, this is how you do it:

  • Open /etc/kde/kdm/kdmrc with you favourite text editor.
  • Find the [Xdmcp] section
  • Uncomment the Enable option, if necessary, and change it to true
  • Save the file
  • Reboot

That’s all there is to it.

NOTE: I have been using the Cygwin/X X server to access my Slackware 10 (KDE 3.4) system for years but it looks like Cygwin/X doesn’t like Slackware 12 and KDE 3.5.  I switched to the Xming X server and everything seems to be working better.  Some fun we’re having.

NOTE: Remote access to your Linux server using X and Xdmcp is inherently insecure. You should only enable Xdmcp on trusted networks. In my case, it is only available to systems on my LAN. The Xdmcp port is blocked at the firewall.

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