Date: Wed, 5 Dec 2001 12:19:29 -0800 From: "Crist J . Clark" <cristjc@earthlink.net> To: "Louis A. Mamakos" <louie@TransSys.COM> Cc: Ruslan Ermilov <ru@FreeBSD.ORG>, Eugene Grosbein <eugen@grosbein.pp.ru>, net@FreeBSD.ORG, security@FreeBSD.ORG Subject: Re: NOARP - gateway must answer and have frozen ARP table Message-ID: <20011205121928.A3061@blossom.cjclark.org> In-Reply-To: <200112051852.fB5IqmH95809@whizzo.transsys.com>; from louie@TransSys.COM on Wed, Dec 05, 2001 at 01:52:48PM -0500 References: <20011205124430.A83642@svzserv.kemerovo.su> <20011205040316.H40864@blossom.cjclark.org> <20011205231735.A1361@grosbein.pp.ru> <20011205193859.B79705@sunbay.com> <200112051835.fB5IZqH95521@whizzo.transsys.com> <20011205204526.B89520@sunbay.com> <200112051852.fB5IqmH95809@whizzo.transsys.com>
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On Wed, Dec 05, 2001 at 01:52:48PM -0500, Louis A. Mamakos wrote:
> > On Wed, Dec 05, 2001 at 01:35:52PM -0500, Louis A. Mamakos wrote:
> > > Doesn't this behavior need to be on a per-interface basis? I'm wondering
> > > if a single sysctl is sufficient to get the desired effect.
> > >
> > No, we want ARP table to stay intact no matter which interface
> > sends us an update.
>
> I thought the original desire was to have a network interface which
> would respond to ARP requests, but only use static IP->MAC address
> mappings installed in the ARP table. I would imagine there are
> circumstances where you'd like other network interfaces on a multi-homed
> host to continue to operate in the "normal" fashion.
I'm not sure I understand the reason for the static table on one
end. If it is for security, you need to have static tables on _both_
machines or a man-in-the-middle attack is still possible. (And in any
case, MAC addresses are trivial to spoof.)
--
Crist J. Clark | cjclark@alum.mit.edu
| cjclark@jhu.edu
http://people.freebsd.org/~cjc/ | cjc@freebsd.org
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