The task such — there is a small network of computers 5 (+ sometimes bring laptops), the Internet gives computer under Windows. Need a simple billing, it is desirable to free. The task is simple: in the Internet to let only the allowed Mac-addresses to track traffic (optional). Well, the simplest tariff plans, like so much in a day with a "subscriber" (defined by Mac address).
There certainly seems to be a good solutions such as Traffic Inspector, but for this task, several Chur — the extra functionality, and even charge.
I would be grateful if you tell me softinkoy.