Wireshark-users: Re: [Wireshark-users] Scripts for filtering a directory file captures to only in
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From: Estanislao Gonzalez <estanislao.gonzalez@xxxxxxx>
Date: Fri, 01 Oct 2010 12:08:42 +0200
As far as I know you need to be root to run tcpdump, and it's not because of the program but because the program needs to access the kernel. 



On 09/30/2010 10:58 PM, Phil_Deming@xxxxxxxxxxxxxxxxx wrote:


Estani, thank you so much for getting me started. That was Great Help !
but now:

The Script ran perfectly with the obvious changes needed !
I new the Script  was working, B U T, tcpdump comes back with Permission
Denied. I chmod to 777 and 755 with no effect.
I ran it on Ubuntu 9.10 and 10.04, same results. I googled it and did the
9.04 fix and it didn't fix it.
     (aa-complain /usr/sbin/tcpdump - This will change it to complain)
     (aa-enforce /usr/sbin/tcpdump - This will renable the AppArmor profile
for tcpdump)
When I changed the Script to use tshark it ran perfectly and gave good
results.
What do I do to fix tcpdump on Ubuntu?





   Re: [Wireshark-users] Scripts for filtering a directory file captures to
   only include specific Subnet packets in new files in a new directory
   (Document link: Phil Deming)


   Phil Deming
              to:
                 Estanislao Gonzalez
                                                         09/29/2010 09:25 AM







Thanks. I'll try it now.  Phil





    Re: [Wireshark-users] Scripts for filtering a directory file captures to
    only include specific Subnet packets in new files in a new directory


    Estanislao Gonzalez
                       to:
                         Community support list for Wireshark
                                                         09/29/2010 07:42 AM




    Cc:
       Phil_Deming









   From:  Estanislao Gonzalez<estanislao.gonzalez@xxxxxxx>



   To:    Community support list for Wireshark<wireshark-users@xxxxxxxxxxxxx>



   Cc:    Phil_Deming@xxxxxxxxxxxxxxxxx







   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





We commit our personal best to you, every day!

The information transmitted may contain confidential material and is intended only for the person or entity to which it is addressed. Any review, retransmission, dissemination or other use of or taking of any action by persons or entities other than the intended recipient is prohibited. If you are not the intended recipient, please delete the information from your system and contact the sender.




--
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