display bandwidth usage on an interface
iftop does for network usage what top(1) does for CPU usage. It listens
to network traffic on a named interface and displays a table of current
bandwidth usage by pairs of hosts. Handy for answering the question "why
is our ADSL link so slow?"

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: http://www.ex-parrot.com/~pdw/iftop/
