How to chain proxies linux:linux:windows without ssh server on windows?
 

I have a home computer running ubuntu (lets call it A), a remote computer running some version of linux (B), and a 2nd remote computer running windows (C). I can connect from A to shell on B using putty, and I can connect fom C to a shell on B using putty. Is it possible to route from A through B to C and then out to browse the internet, such that the I.P. address showing when browsing will be that of C? How to do this?

The remote computer C is part of a network and is behind firewall, so I can not successfully set up an ssh server such as freeSSHd on it.

You may have already solved this. Yes - you can do what you suggest. I used to do this regularly.

The trick is to run VNC on the windows machine: then you can run your internet browser on the windows machine and view it remotely. The second trick is how to connect to VNC running on C, from machine A. I did this by setting up port-forwarding on machine B using ssh. Google for ssh and vnc and you'll find how to do it. I can't remember the incatation i used to use.

Hope this helps.

It depends on which system is connected to the inet