pmacct - 1.7.8-2+b2 main

pmacct is a tool designed to gather traffic information (bytes and number
of packets) by listening on a promiscuous interface or for Netflow data,
which may facilitate billing, bandwidth management, traffic analysis, or
creating usage graphs.
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Data can be stored in memory and queried, displayed directly, or written
to a database; storage methods are quite flexible and may aggregate totals
or keep them separate.