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ARP Poisoning
From: Michael Ungar <m_ungar () yahoo com>
Date: Wed, 6 Nov 2002 20:27:17 -0800 (PST)

From security books I've read it's not hard to
eavesdrop on network communication using tools like
dsniff, even in a switched environment. My
understanding is that it is accomplished quite easily
by ARP poisoning your victim in thinking your
machine's MAC as the router MAC & after interception,
re-forwarding the traffic back to the true router MAC.

Assuming the network environment is large (e.g.,
configuring port switches for specific MAC addresses
not practical) & desktop security cannot be guaranteed
(and thereby cannot prevent people from allowing
machines to IP forward), how can one defend against
other than encrypting data.

Thanks....Mike


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