The browser on your windows machine. It doesn't matter what browser you use, as long as you make sure that you point your browser to your localhost, port 1978.

If you are able to see the knots2 page, than you know that the server side is finished and installed. (I'm not talking about adding your collection now.)

After that, make sure you install knots2 from the repo's on your n900 as well. Under normal circumstances and provided you have set up the server correctly, knots2 on your n900 will make the connection for you and show you what you have on your desktop machine.

PS: Do yourself a favor, and start working locally, just to make sure everything is working correctly, before you start streaming to remote locations over the net.