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Date:      Thu, 12 Sep 2002 13:43:52 +0800
From:      Eugene Grosbein <eugen@svzserv.kemerovo.su>
To:        Stacy Millions <stacy@millions.ca>
Cc:        Ivajlo Nikolov <ivailon@mobikom.com>, stable@FreeBSD.ORG
Subject:   Re: Static ARP table
Message-ID:  <3D802998.BD05F382@svzserv.kemerovo.su>
References:  <3D7F3D34.9BB71DB6@mobikom.com> <3D7F5D17.50609@millions.ca>

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> If I understand you correctly, you want to disable the arp protocol so
> that the only entries in your arp table are the static ones that you
> add. If that is the case, you want to use the -arp option to ifconfig
> to disable arp on the interface in qestion.
> 
> Keep in mind, that disabling the arp protocol means your box will not
> respond to arp request, so all host on your network must be configured
> in this manner (I hope it is a small network :-)

There is http://www.FreeBSD.org/cgi/query-pr.cgi?pr=kern/40763

It introduces new sysctl named
net.link.ether.inet.strict_noarp with default value of 1.

This value corresponds to current meaning of IFF_NOARP.
One can change it to 0 to enable host to reply to ARP queries;
the ARP table is still protected from modifications
via interfaces marked as NOARP.

I have confirmation from several people that it works as expected.
I run it myself in production.

Eugene Grosbein

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