From owner-freebsd-questions@FreeBSD.ORG  Fri Aug 12 15:19:39 2005
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Date: Fri, 12 Aug 2005 18:19:12 +0300
From: vladone <vladone@spaingsm.com>
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Subject: Re: Stranges with ARP
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I dont understand. U want to block users that not have corect MAC
address?. Then permit only corect MAC and deny any else.
Problem with illegal connected users is not very easy to resolv. Any
guy that have some ability, can change MAC address with one that exist
in network and voila!
Solutions for this is to buil some authentication with VPN. But is not
very easy to implement.