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Date:      Tue, 15 Feb 2005 15:53:16 +0300
From:      Igor Robul <igorr@speechpro.com>
To:        freebsd-stable@freebsd.org
Subject:   Re: How to make ipfw consider MAC-IP match?
Message-ID:  <4211F0BC.1070301@speechpro.com>
In-Reply-To: <022401c512d7$e0779890$0c00a8c0@artem>
References:  <200502142022.j1EKMl5R092740@lurza.secnetix.de> <022401c512d7$e0779890$0c00a8c0@artem>

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Artem Kuchin wrote:

> Hi!
>
> I have a table with ethernet (MAC) addresses matching IPs. It is
> used to build dhcp config file. But regardless of that any user can
> assign his neighbour ips while that pc is turned off and use it to
> access internet. The local ips are 192.168. and are behind natd.
> I am running 5.3-STABLE and have heard that ipfw2 can in someway
> use MAC addresses, but how do I setup ipfw in such a way that

I use Samba computer names for this. If user changes computer name, then 
he will not be able login to domain, and will not able do his job. I 
dont restrict very much access to Internet, just do accounting.
It is easy  modify my setup to use user names instead of computer names. 
Accounting is done with trafd and 2 or 3 shell scripts. Maybe you need 
something like this?
If you wish, I can post my scripts.



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