The ipex program is similar to ngrep or tcpdump. It allows you to dump
packet contents in hexidecimal or plaintext. A very handy tool for
debugging network proto- cols. ipex also gives you the option of running
in daemon mode while dumping contents to a specified file. It also allows
you to supply a regex RC pattern for printing pack- ets wich contain
specific patterns. This man page comes with some fairly descriptive
examples.

WWW: ${HOMEPAGE}

