How to control X server startup option "-nolisten tcp" ?

Solution Verified - Updated -

Issue

  • What is the use of "-nolisten tcp" argument for Xorg server and how it can be removed in Red Hat Enterprise Linux 6 ?

    # ps aux | grep Xorg
    root      9854  9852  4 10:54 tty7     00:01:01 /usr/bin/Xorg :0 -br -verbose -auth /var/run/gdm/auth-for-gdm-Dv3eLk/database -nolisten tcp
    
  • How to prevent X Windows from listening on Port 6000 ?
  • How to configure Xorg server to listen for TCP connection from remote X clients ?

Environment

  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • gdm
  • kdm

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