enable xdmcp linux

  • Edit file:

    • Red Hat Enterprise 5, CentOS 5: /etc/gdm/custom.conf
      Note: RHEL5 only uses this file as XDM is no longer supported.
      Add two enties to the existing categories:

[xdmcp]

Enable=true

[security]

DisallowTCP=false

  • One can also use the GUI config tool /usr/sbin/gdmsetup.
    • Red Hat Enterprise 3/4, CentOS 3/4, Fedora 1-6: /etc/X11/gdm/gdm.conf
      Change last line from:

[xdmcp]
Enable=false

    • To:

[xdmcp]
Enable=true

  • One can also use the GUI config tool gdmsetup.
  • Restart X-Windows:

    • [root]# init 3
    • [root]# init 5

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