Wireshark · Wireshark-users: Re: [Wireshark-users] Scripts for filtering a directory file captures to only include specific Subne

[Estanislao Gonzalez <estanislao.gonzalez@xxxxxxx>]

 Hi Phil,

I think you could use something like:

for file in second_dir/*; do
    tcpdump -r $file src net a.a.a.a/x dst net b.b.b.b/y >> $file.filtered
done

You could join all resulting files for a given amount of time with 
tcpslice if that simple append does not do the trick.

I haven't tested this out, but it should give you a clue as to where to 
go from this point.

Cheers,
Estani

On 09/29/2010 12:04 AM, Phil_Deming@xxxxxxxxxxxxxxxxx wrote:
>        I am running Ubuntu 9.10 Server and am collecting  packets with
> TShark 1.4 from about 40 Subnets (Offices)  traversing  my aggregation
> Subnet (the Datacenter). There are 9000  64meg files collected per day
> before overwriting begins. When a Network question arises, I copy the 1 to
> 3 hours of files to a 2nd Directory so that they won't be overwritten
> later. That's about 180+  64 meg files.
>        I need to filter all of the files in the 2nd Directory to create new
> files only containing packets from 1 to 4 transmitting or receiving
> Subnets. I need all of the IPs from each subnet.
>        Next, want to see the "Top Talkers" during this period.  That should
> be the easy part.
>
>        I presume grep, bash, awk editcap, tshark, tcpdump are the tools. Can
> someone get me started with some scripts / examples?
>
>
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--
Estanislao Gonzalez

Max-Planck-Institut für Meteorologie (MPI-M)
Deutsches Klimarechenzentrum (DKRZ) - German Climate Computing Centre
Room 108 - Bundesstrasse 45a, D-20146 Hamburg, Germany

Phone:   +49 (40) 46 00 94-126
E-Mail:  estanislao.gonzalez@xxxxxxx