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[ubuntu] Remotely control a running X session on a computer behind a NAT

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http://ubuntuforums.org – Hi, I am trying to remotely control a running X session on a computer running Ubuntu 12.04 LTS. Here is the setup: A: Windows 7 64 bit machine (I also have an Arch Linux machine I can use instead, if that is easier) P: Ubuntu 11.04 server (GNU/Linux 2.6.38-8-server x86_64). This machine has a public IP, and a domain that refers to it (I will call this domain P). Z: Ubuntu 12.05 LTS desktop (GNU/Linux 3.2.0-27-generic x86_64). This machine is behind a NAT which I cannot configure. I have administrative privileges on all these machines; just not the NAT between Z and the world. The b (Hardware)