How do I install and use OpenVPN?

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http://askubuntu.com – I am hoping to take my desktop computer, which is currently running the desktop version of Ubuntu, and instead run Ubuntu server. Once the server is setup and running properly, I should be able to follow this tutorial http://madisonlinux.org/InstallingOpenVPNOnUbuntu10.04, which I believe allows me to connect securely with my windows-based laptop. So if anyone can tell me, which server I should install, and how to install it that would be awesome. I am assuming there is already a tutorial on these forums already saying how to do this, but unfortunately, after trying 3 different searches, I w (HowTos)