Setting up PPTP VPN server on a CentOS OpenVZ VPS
There are mainly 3 types of VPN servers: Point-to-Point Tunneling Protocol (PPTP), Layer 2 Tunneling Protocol (L2TP) and OpenVPN.
In this tutorial I set up a PPTP server on a CentOS VPS as its supported by almost all devices natively: Windows, Linux, Android, iOS and Mac.