VTun is the easiest way to create Virtual Tunnels over TCP/IP networks with traffic shaping, compression, and encryption. It is a user space implementation and doesn’t need modification of any kernel parts. VTun supports IP, PPP, SLIP, Ethernet, and other tunnel types. VTun is easily and highly configurable; it can be used for various network tasks like VPN, Mobil IP, Shaped Internet access, Ethernet tunnel, IP address saving, etc.
You can download it from the following link: https://packetstormsecurity.com/files/download/10083/vtun-2.1b3.tar.gz
Source: https://packetstormsecurity.com/files/10083/vtun-2.1b3.tar.gz.html