Date: Mon, 28 Jul 1997 19:06:47 -0400 (EDT) From: Brian Buchanan <brian@thought.res.cmu.edu> To: "Nicole H." <nicole@mediacity.com> Cc: security@FreeBSD.ORG Subject: Detecting sniffers (was: Re: security hole in FreeBSD) Message-ID: <Pine.BSF.3.96.970728190019.26892A-100000@thought.res.cmu.edu> In-Reply-To: <Chameleon.870081818.nmh@geekgirl>
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On Mon, 28 Jul 1997, Nicole H. wrote: > Does anyone know of a good way to detect people "sniffing" on the network? IE a program that will detect a > machine running in promiscuous mode? > I was wondering the same thing when I read a clause prohibiting the use of network cards in promiscuous mode in the CMU network use policy. I asked some computer security people I knew about this and their response was that it is not possible to detect if a network card is in promiscious mode unless you have access to the machine it's in - i.e., that you can look at ifconfig on that machine.
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