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Re: [K12OSN] Network monitoring

Daniel Kuecker wrote:

Does anyone have a suggestion on an open source setup to monitor network
traffic? I want to setup a server to monitor the traffic so I can see
who is going where, what bandwidth is being used, and what services are
being used. Any suggestion would be greatly appreciated.

You might want to check out ntop (http://www.ntop.org/). From the website:

    What ntop can do for me?

    - Sort network traffic according to many protocols
    - Show network traffic sorted according to various criteria
    - Display traffic statistics
    - Store on disk persistent traffic statistics in RRD format
    - Identify the indentity (e.g. email address) of computer users
- Passively (i.e. withou sending probe packets) identify the host OS
    - Show IP traffic distribution among the various protocols
- Analyse IP traffic and sort it according to the source/ destination
    - Display IP Traffic Subnet matrix (who's talking to who?)
    - Report IP protocol usage sorted by protocol type
- Act as a NetFlow/sFlow collector for flows generated by routers (e.g. Cisco and Juniper) or switches (e.g. Foundry Networks)
    - Produce RMON-like network traffic statistics

It is not a very lightweight app, but it is very easy to setup and really shows a *lot* of stats. It is distributed under the GPL.

Nils Breunese.

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