Re: My "wire" / not yours

From: S. Pidgorny (slavickp_at_yahoo.com)
Date: 03/23/05 

Date: Wed, 23 Mar 2005 20:34:26 +1100

There can be many devices using same MAC address. That allows to bypass DHCP
security, and in some cases 802.1x and proprietary switch port security
solutions:

http://sl.mvps.org/docs/802dot1x.htm 

-- 
Svyatoslav Pidgorny, MS MVP - Security, MCSE
-= F1 is the key =-
"Sylvie" <sylviep@videotron.net> wrote in message
news:uL0jvo1LFHA.1180@TK2MSFTNGP14.phx.gbl...
> In the end it comes down to this : some switches (probably all by now)
allow
> you to set the port to accept only one MAC address. You do not have to set
> the MAC address that you want to enable. The switch will accept the first
> one and refuse all others. We use this configuration to prevent users from
> connecting hubs and switches or unauthorized computer. The problem with
this
> is that you will have to clear the port config when you want another
> computer to connect to the port.
>
> Sorry I do not know the protocol or the RFC but I know that Cisco 2900
> series switches can do it.
>

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