Tableutil is a utility for converting,
aggregating, and performing operations (currently
unions, differences, complements, and
intersections) on lists of IP addresses. Its
primary use is to convert files into a format
pfctl(8) can read. It can read plain-text files
with ranges (12.12.12.12-23.23.23.23), CIDR-style
networks (192.168.0.0/24), single addresses
(242.242.242.242), or host names (one.two.com). It
can also read p2b files, the preferred
file-format of PeerGuardian.
