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RE: parsing very large tcpdump files

from [Brian Smith] Network Security [Permanent Link]
Subject: RE: parsing very large tcpdump files
Date: Fri, 19 Nov 2004 13:54:38 -0600 
Check out tcpick.sourceforge.net -- it's pretty cool and
can reassemble tcp streams on very large files, along
with a ton of other things.

        Brian


-----Original Message-----
From: Tom [mailto:digitalevidence@excite.com]
Sent: Thursday, November 18, 2004 5:30 PM
To: focus-ids@securityfocus.com
Subject: parsing very large tcpdump files



moderator: sorry if this is vague.  My requirements are not 
fixed yet and will probably change from case to case, 
therefore I am just looking for generic info now.



I was wondering if anyone on this list can recommend some 
tools (Opensource or commercial) to automate the parsing of 
very large (many GB) tcpdump files.  I am trying to put 
together a generic toolset but in general some things I'd 
like to do are:



1. Filter out traffic to/from a specific IP address or range

2. Reconstruct all reconstructable sessions in an easy to 
parse way: emails, web sites visited (and content 
uploaded/downloaded), voip, anything else imaginable.

3. Be able to search all of this data for keywords. 



This may seem like a tall order.  I know of a few tools to do 
individual tasks on a small scale, such as mailsnarf, vomit, 
ethereal,  etc. but it's not practical to use ethereal to 
parse these by hand. I've tried chaosreader.pl but it bogs 
down on files as small as 200 MB.



I'd appreciate any input.



Thanks.





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