For OS X, the OpenVPN client is called "Tunnelblick" and available for free download.........

  Open Internet Connect First, open the ‘Applications’ folder by going to the Finder and choosing “New Finder Window” from the “File” menu. Click on the ”Applications” icon, then scroll down until you see the “Internet Connect” icon.........

Setting up a VPN in Linux can be as easy as Windows if your Linux distrubiton such as Ubuntu comes prepared for a VPN connection and many versions of Linux do.  Sometimes VPN setup on Linux can be a bit more difficult. The only "VPN/Network Management Plugins" you need would be PPTP (which we use) and OpenVPN (used for Stealth VPN/Situations where VPN connections are blocked by their ISP/Country). Ubuntu Linux Setup Guide Install t........