Hello Mike,

>> Please take a look at the SSH proxy feature in PyHoca-GUI and check if that meets your requirements.
PyHoca-GUI seems to have nothing to do with my wish.

>> Ok, we will investigate what putty is doing and maybe it is quite easy to immitate that. I am still not sure what there is behind that technologically.
See http://www.ietf.org/rfc/rfc2616.txt for the CONNECT command in http and how to deal with proxy servers.

Best regards

Heinrich