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Date:      Sun, 22 Aug 1999 22:08:32 +0100
From:      Josef Karthauser <joe@pavilion.net>
To:        Bigby Findrake <bigby@shiva.eu.org>
Cc:        jay d <service_account@yahoo.com>, "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net>, Evren Yurtesen <yurtesen@ispro.net.tr>, freebsd-security@FreeBSD.ORG
Subject:   Re: multiple machines in the same network
Message-ID:  <19990822220832.A70149@pavilion.net>
In-Reply-To: <Pine.BSF.4.05.9908201246050.16714-100000@shiva.eu.org>; from Bigby Findrake on Fri, Aug 20, 1999 at 12:46:28PM -0700
References:  <19990820192825.15974.rocketmail@web601.yahoomail.com> <Pine.BSF.4.05.9908201246050.16714-100000@shiva.eu.org>

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On Fri, Aug 20, 1999 at 12:46:28PM -0700, Bigby Findrake wrote:
> On Fri, 20 Aug 1999, jay d wrote:
> 
> > What you really want is a VLAN capable switch. VLAN switches simply
> > designate what ports on a switch can see what other ports on the same
> > switch. I have to correct you though, Rodney, as sniffing is currently
> > possible through switches.
> 
> Please, do tell us how it's possible to sniff through switches.

A switch only switches when it knows how where the destination mac
addresses live.  Most switches only have a fixed size table of mac
addresses, so if you could somehow flood this table with bogus
entries the switch would broadcast packets to destinations that it
can't locate.

The rest is an exercise for the reader, (although not on _my_
network please ;)

Joe
-- 
Josef Karthauser	FreeBSD: How many times have you booted today?
Technical Manager	Viagra for your server (http://www.uk.freebsd.org)
Pavilion Internet plc.  [joe@pavilion.net, joe@uk.freebsd.org, joe@tao.org.uk]


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