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Date:      Sun, 26 Apr 1998 23:56:10 +0200
From:      Eivind Eklund <eivind@yes.no>
To:        Julian Elischer <julian@whistle.com>, Alexander Matey <lx@hosix.ntu-kpi.kiev.ua>
Cc:        freebsd-hackers@FreeBSD.ORG
Subject:   Re: Static ARP (IFF_NOARP usage in ethernet interfaces)
Message-ID:  <19980426235610.22010@follo.net>
In-Reply-To: <Pine.BSF.3.95.980426123550.21604C-100000@current1.whistle.com>; from Julian Elischer on Sun, Apr 26, 1998 at 12:39:38PM -0700
References:  <19980426183333.38119@hosix.ntu-kpi.kiev.ua> <Pine.BSF.3.95.980426123550.21604C-100000@current1.whistle.com>

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On Sun, Apr 26, 1998 at 12:39:38PM -0700, Julian Elischer wrote:
> I see no technical reason against this but
> I'm curious why one would want to do this.. I can't imagine 
> a single reason for not wanting to do arp..

Security.  You want to be able to force a particular MAC address to
match a particular IP address, so people can't come with a different
computer and take over the IP address of a known computer.

Of course, with today's programmable ethernet cards, you also have to
keep the MAC address secret for this strategy to be effective.

Eivind.


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