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RE: discovering network layout at layer2
From: "Dave Killion" <dkillion () charter net>
Date: Thu, 12 Feb 2004 15:08:34 -0800

Harry de Grote mentioned:

arp requests for the whole subnet? ;)

The hacker's choice R U There (or just "THCRUT") facilitates this nicely.
Give it an IP and subnet mask, and that sucker will spit out several
thousand parallel threads for ARP requests.  Scan a B in nothing flat.
What's great is, not many systems detect ARP scans yet, so your IP-layer
scan detectors generally miss this.

-Dave


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