Is there anything that will run on a mac (as is possible with several windows solutions) that will act as a web portal and provide a dynamic radius database to an airport extreme base station whereby I can create usernames and passwords, expiration dates, and bandwidth limits and see who is on and what network traffic they are causing. It seems easy on windows! come on!! I've been searching google for days - nothing for mac osx. Somebody suggested to me a proprietary router - but I am sure that is not necessary at all. Anyone?