nifmon

Curses based network interface monitoring tool

Nifmon is a curses-based tool for FreeBSD which can be used to monitor network interfaces (also tun devices). It displays continously updated statistics for the following quantities: - total amount of bytes/packets transferred in/out - bytes/packets transferred in/out during the last second/minute/hour - a stripped down tcpdump output You will need super-user permissions in order to use nifmon.