Version 1.7.8 is available upstream. Please consider updating! It seems that version 1.7.8 is available upstream, while the latest version in the Gentoo tree is 1.7.7-r1. You think this warning is false? Read more about it here.
nfdump is a toolset to collect and process netflow and sflow
data, sent from netflow/sflow compatible devices. The toolset supports
netflow v1, v5/v7,v9,IPFIX and SFLOW.