Title...: How to use tunneling to get past the company firewall
Author..: Axel Trocha
Date....: 2004-Jul-06
------------------------------------------------------------------------------

        firewall
           |
   WORK    |                       HOME                       MUME
  ------   |                      ------                     ------
           |
       23  | blocked            
       25  | blocked         +---------------+
          -+--               |               |           mume.pvv.org
       80 HTTP <-> open <--> | tunnel server | <---->    port 23
          -+--               |               |
       110 | blocked         +---------------+
        :  |
      4242 | blocked
           |
           |
        firewall


Example:
--------

  Home:  1) hts --forward-port mume.pvv.org:23 4321

  Work:  2) htc --forward-port 4242 <home_ip>:4321
         3) telnet 127.0.0.1 4242


  1) Installs the tunneling-server on your home machine. Mume must be
     reachable from there. In this case the tunneling-server will listen
     on port 4321. (It will receive HTTP encapsulated packets on 4321 and
     then open a telnet connection to mume.pvv.org:23 and forward the
     received data)

  2) Installs the tunneling-client on your workstation at work. The
     client will listen on port 4242 for telnet connections. Make sure
     you use a port which is not used by Windows. (If it receives a
     telnet connection on port 4242, it will encapsulate the data into
     HTTP packets and then send the data to the tunneling server at home.)

     The example is for situations where no proxy is needed. If you
     are forced to use a proxy, you need to add following argument to
     your htc line:  --proxy <IP_of_proxy>:<port_of_proxy>

  3) To actually connect to Mume, you have to connect to your tunneling
     client on the given port. (telnet 127.0.0.1 4242 in our case)


Good Luck!