LFT, short for Layer Four Traceroute, is a sort of 'traceroute' that
often works much faster (than the commonly-used Van Jacobson method) and
goes through many configurations of packet-filter based firewalls. More
importantly, LFT implements numerous other features including AS number
lookups, loose source routing, netblock name lookups, et al.

Recent LFT releases (as of version 2.5) include WhoB, a no-frills whois
client (see whois(1)) designed to provide everything a network engineer
needs to know about a routed IP address by typing one line and reading
one line.

• Michael Shigorin

• lft