i promise to put the real README here shortly. In the meantime, heres the comments from reDuhClient.java

/**
	* The name? redirector.jsp ==> redir.jsp ==> reDuh.jsp
	*
	* *reDuh allows us to tunnel TCP traffic to any machine:port pair through a webserver which is only open on port 80.
	* *If you don't know why this is useful, you probably don't need it.
	*
	* Like this:
	* 
	*   [Internal Machine]		 ___[Webserver]___							[Attacker Machine]
	*					   /----<---<---|		reDuh.jsp     |<----[reDuhClient] <---[Client Application]
	*			 	 	   | n				  |		pipedInput	 	| 80  			 |					|	n		 |
	*  [listening service]--->|		pipedOutput		|---->--->---/					\------^
	*													\_________________/
	*
	*	Glenn Wilkinson :: SensePost
	*	glenn@sensepost.com
	**/