Wireshark · Wireshark-users: Re: [Wireshark-users] Tshark Filter to create new smaller PCAP

[Wes <wes_r@xxxxxxxxx>]

George,

tshark -h is probably easier to understand than the man page, but try something like this:

tshark -R ip.addr==1.1.1.1 -r test.pcap -w testout.pcap

Wes

--- On Tue, 11/29/11, George Vandelet <george_vandelet@xxxxxxxxx> wrote:

From: George Vandelet <george_vandelet@xxxxxxxxx>
Subject: [Wireshark-users] Tshark Filter to create new smaller PCAP
To: "Wireshark" <wireshark-users@xxxxxxxxxxxxx>
Date: Tuesday, November 29, 2011, 4:56 PM

Super Users.

I have a PCAP file that is over 100M.  I wish to open it but my GUI version of Wireshark 32.0.0_ofc14 but it crashes each time I try to open it.  I have heard that one can use Tshark to open huge PCAP files then perform a filter to focus in on the type of traffic and then save the results to a different PCAP file.  Hopefully the new PCAP file will be smaller than the original and I can open it with the GUI version of Wireshark. 

The man page for Tshark is too cryptic for me.  I am hoping that someone has done this before and can guide me to which options I need to choose on the TSHARK command to achieve what I want.  I would prefer to filter on a MAC address but can filter on an IP address.

Can someone provide me with an example Tshark command that I could use to accomplish this?

Lets assume the following:

    test.pcap - is the name of the original file that is huge

    my filter criteria is either an IP address of 1.1.1.1 or a MAC is 01:01:01:01:01:01

    testout.pcap - is the name of the file I wish to make using one of the above filters that hopefully will contain only a small amount of packets and result in a PCAP file that I can open with the GUI version of Wireshark.

Thanks,

George

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