Unixmen posted a tutorial about setting up a PPTP VPN in Linux

PPTP or PopTop is a vpn implementation that is rather similar to OpenVPN. The difference is that PPTP is quite a bit less secure than OpenVPN, as it is not encrypted. That said, if you need quick VPN solution that?s easy and hassle free to set up, PPTP is the obvious choice.

  Setting up a PPTP VPN in Linux