IPA_IP6FW -- IPA accounting module for FreeBSD IPv6 Firewall

Main features:

- The module is designed for traffic accounting from IPv6 Firewall
  rules byte counters;
- The module understands IPv6 Firewall rules byte counters overflow;
- It is possible to summarize and subtract statistics of IPv6 Firewall
  rules byte counters;
- It is possible to distinguish IPv6 Firewall rules with the same numbers;
- IPv6 Firewall rules can be dynamically added to and deleted from
  the system, the module correctly works in such situations.

WWW: http://ipa-system.sourceforge.net/modules/ipa_ip6fw/