From owner-freebsd-isp  Thu Feb 22  7:40:23 2001
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From: "Andy [TECC NOPS]" <andy@tecc.co.uk>
To: "Brian" <wrath@shianet.org>, <freebsd-isp@freebsd.org>
Subject: RE: Filtering connections to ftpd by mac address ?
Date: Thu, 22 Feb 2001 15:43:47 -0000
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because the router is the gateway. When packets
enter your LAN from the outside world they are
actually coming from the ethernet port of your
router. The IP address will appear to have come
from the outside, but mac addresses are always
local to the LAN they travel on. That's why routers
are called just that, they route packets across LANs
(mainly).

Ak

> -----Original Message-----
> From: owner-freebsd-isp@FreeBSD.ORG
> [mailto:owner-freebsd-isp@FreeBSD.ORG]On Behalf Of Brian
> Sent: 22 February 2001 03:28
> To: freebsd-isp@freebsd.org
> Subject: Re: Filtering connections to ftpd by mac address ?
>
>
> I don't understand how this can be true.  Why would you only be
> able to see
> the router's MAC?  Maybe I'm more clueless than I thought.
>
> brian@wrath.com
>
> ----- Original Message -----
> From: "Colin Campbell" <sgcccdc@citec.qld.gov.au>
> To: "David Wilson" <davew@sai.co.za>
> Cc: "FreeBSD Mailing List" <freebsd-isp@FreeBSD.ORG>
> Sent: Wednesday, February 21, 2001 4:59 PM
> Subject: Re: Filtering connections to ftpd by mac address ?
>
>
> > Hi,
> >
> > Filtering on MAC address is very restricted. You can only do machines on
> > the same network segment. After that all you see is the router's MAC
> > address.
> >
> > Colin
> >
> >  On Wed, 21 Feb 2001, David Wilson wrote:
> >
> > > Hi guys, howzit going ?
> > >
> > > Any ideas on how to filter connections to ftpd based on mac address ?
> ;-)
> > > I have looked into ipfw and tcp wrappers, but both only seem
> to be able
> to
> > > do IP addresses.
> >
>
>
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