traffic counting

[Alexandr Lookoshkoff]

Hello freebsd-questions,

  How to make such thing as traffic counting?

  There is a gateway (with NAT) and a local network. Every month
  i must send a report how many traffic get everybody.

  What tool can help me with it?

  ipfw count ...
  Counters zeroed every reboot (so - everyday)
  How to collect and store these counters? And how to list a summary
  trafic (by days if possible)?

-- 
Best regards,
 Alexandr                          mailto:alcr at orbitel.ru