HTun is a tool to allow you to create a fully bidirectional IP VPN over an HTTP proxy or just over port 80, allowing you to bypass restrictive firewalls and use any service you desire.
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.
