full-disclosure - Re: pcap flow extraction

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Date: Sat, 8 Dec 2007 23:47:32 -0500
From: "Richard Bejtlich" <taosecurity@...il.com>
To: ivanhe@...il.com, full-disclosure@...ts.grok.org.uk
Subject: Re: pcap flow extraction

Ivan wrote:

> Does anyone have any ideas for flow information extraction from a rather
> large pcap file, 6 gigs?
>
> I am after the standard stuff, source, destination, service.
>
> Ethereal/wireshark is a no go, as it won't process the file due to size,
> tcpflow is OK, but a little untidy.
>
> any suggestions are appreciated, preferably open source and also
> has anyone used "tcpdstat" for something like this?

Ivan,

Argus (qosient.com/argus) is your friend, e.g:

argus -r your.pcap -w - | ra -n -z -L0

Russ McRee wrote a nice Argus 3 intro here:

http://holisticinfosec.org/toolsmith/docs/november2007.pdf

Tcpdstat is not the right tool for this task.  If you do want summary
stats, Tshark does a better job:

tshark -n -r your.pcap -q -z io,phs

I cover these in my books and blog.

Sincerely,

Richard

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