This program collects headers of ip packets that travel through the linux 2.4+ netfilter.

it writes accounting information to a log which can include protocol type, source/destination address, port information, byte and packet count, incoming/outgoing network interfaces.

records in the accounting logfile are freely configurable via a format string, for example it is possible to mimic the output format of cisco's "ip accounting output-packets" or to generate sql statements that can be fed directly into a dbms.