VTun provides a method for creating Virtual Tunnels over TCP/IP networks and allows one to shape, compress, and encrypt traffic in those tunnels. Supported types of tunnels are: PPP, IP, Ethernet and most other serial protocols and programs. VTun is easily and highly configurable: it can be used for various network tasks like VPN, Mobile IP, Shaped Internet access, IP address saving, etc. It is completely a user space implementation and does not require modification to any kernel parts.