bpfmon

While tcpdump shows what packets are going through the
network, bpfmon will show how much in terms
of bytes per second and packets per second in a
nice pseudo-graphical terminal interface.
bpfmon also supports monitoring an iptables rule that
is selected by command line option or selected from a
menu.

          

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License: GPL-2.0-or-later
URL: https://github.com/bbonev/bpfmon/