nstreams - 1.0.4-1+b1 main

Nstreams is a utility designed to identify the IP streams that are
occurring on a network from a non-user friendly tcpdump output of
several megabytes. This is especially useful when you plan to install
a firewall but if you do not know the nstreams that the network users
are generating (http, real audio, and more...).
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Nstreams can read the tcpdump output directly from stdin, or from a file.
It can even generate the configuration file of your firewall.