vncviewer fails on remote machine

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http://forums.fedoraforum.org – Hi, I've looked throuigh previous threads and not found anything to help. I have tigervnc-server running, port 59000 & 5901 tcp & udp open. but unable to get vncviewer to function on the remote machine. I can run vncviewer localhost:1 and that works, but on the remote machine Code: [richard@g8jvm ~]$ vncviewer TigerVNC Viewer for X version 1.1.0 - built Mar 27 2012 12:59:01 Copyright (C) 1999-2011 TigerVNC Team and many others (see README.txt) See http://www.tigervnc.org for information on TigerVNC. vncviewer: unable to open display "" If I (HowTos)