Linking Server to Website

I have moderately good internet, yet I can only have a max of three people playing at a time or the server will crash. I have heard that you can link it up to your website (completely your own, with ftp access, etc) so that it is broadcasted better. Can anybody show me how to do this, or even better do it for me? Also. One server says that I must sign up at http://prosl.com to play it it. How can i do that with my server? Any help would be appreciated a lot.