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RE: Small hardware network sniffer - does it exist?
From: "Porter, Thomas (Tom)" <tporter () avaya com>
Date: Tue, 7 Nov 2006 22:13:57 -0500

This can be done at home. I'm running a Linux 2.6 kernel on a Freescale Coldfire setup w/ two FECs, boa to visualize 
the results, ssh, and a somewhat (still) flaky packet sniffer that is getting closer everyday to working. You can see 
more details about this on my website: http://www.dtool.com. This is not a commercial product (yet)

Best, Tom

PS. Shouts out to Danny K for the cool SSL stuff

Thomas Porter, PHD | Sr. Security Architect | Consulting & Systems Integration | Avaya Global Services | Virtual 
Office: 919.967.2909 | Mobile: 919.593.1570 | Email:tporter () avaya com | IM: AvayaTPorter 


-----Original Message-----
From: listbounce () securityfocus com [mailto:listbounce () securityfocus com] On Behalf Of Rogan Dawes
Sent: Monday, November 06, 2006 9:57 PM
To: Petr.Kazil () eap nl
Cc: PenTest
Subject: Re: Small hardware network sniffer - does it exist?

Petr.Kazil () eap nl wrote:
I have ordered a few hardware keyloggers to play with
(http://www.keelog.com/) and I was wondering if the same idea exists 
for networks?
A device that you could tape under a desk, and that would act as a 
transparant bridge, sniffing all traffic.

I know that you can use arp-spoofing to get a similar result (easier, 
better?), and I know about hardware network taps.
But I'm still interested in the theoretical possibilities of this idea.

I have a few old laptops, but these have just one PCMCIA network card, 
so bridging is not possible (well, with the right kind of network 
cards you can get two in that  slot - I'll see if you can still buy 
them). But laptops are too big and heavy.

I've looked at microcontrollers with ethernet adapters, but here I 
find webserver appliances with just one network interface. They're 
small but I'm not sure if you could run an OS and a sniffer on them. 
I've looked at miniboards but they are very expensive, too expensive for "just a toy".

But, considering that you can get a 2-cigarette-pack sized 
Pix-firewall, such hardware must exist. But I haven't found the right 
keywords yet. Any ideas?

Greetings, Petr Kazil

This looks like the answer to your question - I can't really imagine anything smaller!

http://www.arxceo.com/

And

http://linuxdevices.com/news/NS2860172381.html

The Yoggie will supposedly also support an SDIO wireless card, so you can bridge and snoop AND get remote access at the 
same time.

Regards,

Rogan

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