JHttpTunnel - GNU httptunnel's protocol in Java.

JHttpTunnel is the implementation of GNU httptunnel's protocol in pure Java. httptunnel creates a bidirectional virtual data connection tunnelled in HTTP requests. The HTTP requests can be sent via an HTTP proxy if so desired. This can be useful for users behind restrictive firewalls. If WWW access is allowed through a HTTP proxy, it's possible to use httptunnel and, say, telnet or PPP to connect to a computer outside the firewall.