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The nfcount can be used for count network flows by using rules and display it in form of set html pages. Support network flow records from Cisco NetFlow, Argus, Cisco IP Accounting.
This is a set of simple utilities and scripts to collect, aggregate, summarize and analyze NetFlow traffic accounting data from modern routers by Cisco and Juniper.
EHNT is a tool which turns streams of Netflow (version 5) data into something useful and human-readable. (Netflow is a UDP-based traffic reporting protocol created by Cisco, generated by Cisco, Juniper, Foundry, and other routers.)
The netfltools project is a set of tools for processing Cisco netflow export protocol. It includes a server which easy allows on the fly data filtering, aggregation, logging etc., a management console and an utility for data acquisition.
F.L.A.V.I.O. is a GPL'ed data grapher for netflow data export compatible devices (Cisco and Juniper routers among others, or unix servers running ntop with netflow export plugin). It uses a MySQL backend and has been entirely developed in Perl.
CarrierIn is a module that can be used with FlowScan netflow
analysis tool
(http://www.caida.org/tools/utilities/flowscan/index.xml).
It is based on CampusIO.pm analyser, but more adaptated to
a large ISP or a carrier's needs.