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RE: Caching a sniffer
From: Fernando Gont <fernando () gont com ar>
Date: Wed, 24 Mar 2004 19:26:41 -0300

At 10:20 23/03/2004 -0800, Shawn Jackson wrote:

To my knowledge, though not very extensive, I know of no command/system
in switches to detect a NIC/Adapter in promiscuous mode and disable the

That would not be possible. Promiscuous-mode is about not performing hardware filtering at the data link layer, so that your host actually gets all the frames sent on that segment of the network.

So, other than runnning something like ifconfig on the host that is in promiscuos mode, or running an heuristic check remotely, you cannot detect a host is in promiscuous mode.

Fernando Gont
e-mail: fernando () gont com ar || fgont () acm org

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