IPFILTER - Understanding log entries

[Darryl Hoar]

Greetings,
I have a machine installed with Freebsd & IPFILTER.
The machine is setup as a firewall.

The log files generated are large.  First, is there a
tutorial or tool that will process the log file and show
what the threat is ?  (if there is one).

Also, how do others handle the volume of entries in
the log file ?

thanks,
Darryl