HTun creates an point-to-point virtual IP network over HTTP by encapsulating IP traffic into valid HTTP requests. The HTun server runs on a host with an unrestricted Internet connection. It listens on a common webserver port (80 or 443) and accepts HTun client connections. The HTun client daemon runs from within a restrictive network environment, communicating with the HTun server over an HTTP proxy.

We were motivated to write HTun to combat the increasingly restrictive network environments common in most workplaces -- to liberate the people who really are being oppressed by the lameness of management's decisions. We hope you enjoy it, and help us improve it as well.

http://htun.runslinux.net/about.html