XDMCP Configuration - XDM

This page will tell you how to configure XDM for XDMCP. If you are not using XDM, this page is not intended for your use. To determine what DM you are using, follow the instructions on the XDMCP page.

Configuring XDM

XDM uses two configuration files called xdm-config and Xaccess. You'll need to figure out where these files are on your system. For Redhat systems, it is in /etc/X11/xdm/. You may have to search for it using the locate command, or the find command.

Small section of your xdm-config file

# -- many lines omitted --
      DisplayManager.requestPort:  177
   # --or--
#     DisplayManager.requestPort:  0
# -- many lines omitted --

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You can either comment out the entry, by placing a '#' or '!' in front of the line, or by changing the value from 0 to 177.

The above is NOT the complete xdm-config file. You must open this file, and locate the referenced line, and make sure you change it as described above.

Your Xaccess file

# In the Xaccess file, you will need a line that starts with an asterisk ('*'). The line should look like this:
*      #any host can get a login window

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Once your xdm-config and Xaccess files are configured properly, continue with the remainder of the instructions on the XDMCP page.

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For further troubleshooting help, you can view the more detailed Gray Screen troubleshooting guide.

-- SteveSwitzer - 07 Dec 2004