By default Linux disallows TCP connections from remote hosts. It prevents applications from running on a remote host and being able to be displayed on the local x server.

To enable the X server to display remote applications open /usr/share/gdm/defaults.conf file. Set DisallowTCP=true to false

# vi /usr/share/gdm/defaults.conf
Set DisallowTCP=true to false
DisallowTCP=false

Setting DisallowTCP to false will allow remote clients to connect.

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Display remote applications on my local X server in Linux

Originally from nixCraft by nixcraft

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