Stuntapen

Serial TUN/TAP Encapsulation (Stuntapen) is a simple program that implements a SLIP (RFC 1055)-like algorithm, extended to allow either IPv6 packets (when using a TUN device) or Ethernet frames (when using TAP) to be transferred over some kind of a serial line, such as a computer's serial port, a TCP stream, or an SSH session. When used together with Netcat or SSH, it could be used to create a crude but working IP tunnel or VPN, or to forward IP traffic to a low-feature embedded system via a serial line or USB, or for educational purposes.