command-line reverse connection tunnel?

["Nick Jacobsen" <nick () ethicsdesign com>]

As to the subject, I don't know how else to describe what I need in simple
words :)

I am hoping one of you might have an idea on how to implement the following,
keeping in mind that everything MUST be done using a command-line only. I
have a machine ("SERVER1") behind a firewall that lets in only port 80, on
which there is an HTTP server, but lets out all traffic.  I need to connect
my machine ("CLIENT") to that server's Remote Desktop, which runs on port
3389.  I have command line access to the remote machine by sending a reverse
command prompt.  So, the question is, what tools are out there that would
let me create a tunnel as follows:

SERVER1 ----> CLIENT1(port whatever) <---- CLIENT1(Listener port 3389)
CLIENT1(RDP client program) -----> CLIENT1(port 3389) <- Existing Pipe ->
SERVER1(port 3389)

To explain, I need a program on  SERVER1 that creates a connection to
CLIENT1.  the connection that is created to CLIENT1 then needs to listen on
port 3389.  When CLIENT1 recieves a connection, it needs to pass it through
the existing pipe, and SERVER1 needs to connect to itself on port 3389.

Sort of confusing, I know, and any other suggestions would be welcome, with
the stipulation that, again, SERVER1 can only accept outside connections
from port 80, but can make connection to any computer.

Thanks,
Nick Jacobsen
Ethics Design
nick () ethicsdesign com


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