Date: Mon, 6 May 2002 09:03:08 -0400 From: Michael Lucas <mwlucas@blackhelicopters.org> To: Ceri Davies <setantae@submonkey.net> Cc: doc@FreeBSD.ORG Subject: Re: Advanced Networking Question Message-ID: <20020506090308.A20367@blackhelicopters.org> In-Reply-To: <20020506124528.GA7841@submonkey.net>; from setantae@submonkey.net on Mon, May 06, 2002 at 01:45:28PM %2B0100 References: <20020506124528.GA7841@submonkey.net>
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Yes, it's incorrect. You might say, "in a similar manner to a bridge." I also really dislike the capitalization of Bridge. On Mon, May 06, 2002 at 01:45:28PM +0100, Ceri Davies wrote: > > Hi all, > > >From the Advanced Networking chapter of the Handbook : > > <title>Dual Homed Hosts</title> > <indexterm><primary>dual homed hosts</primary></indexterm> > <para>There is one other type of configuration that we should cover, and > that is a host that sits on two different networks. Technically, any > machine functioning as a gateway (in the example above, using a PPP > connection) counts as a dual-homed host. But the term is really only > used to refer to a machine that sits on two local-area > networks.</para> > > <para>In one case, the machine has two Ethernet cards, each having an > address on the separate subnets. Alternately, the machine may only > have one Ethernet card, and be using &man.ifconfig.8; aliasing. The former is > used if two physically separate Ethernet networks are in use, the > latter if there is one physical network segment, but two logically > separate subnets.</para> > > <para>Either way, routing tables are set up so that each subnet knows > that this machine is the defined gateway (inbound route) to the other > subnet. This configuration, with the machine acting as a Bridge <===== > between the two subnets, is often used when we need to implement > packet filtering or firewall security in either or both > directions.</para> > > Now I could be wrong, but I was under the impression that routing was a layer > 3 function, and bridging was layer two, so isn't the statement that the machine > is acting as a bridge incorrect (since it also states that the machine is doing > routing) ? > > Thanks, > > Ceri > > -- > get the cool shoe shine > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-doc" in the body of the message -- Michael Lucas mwlucas@FreeBSD.org, mwlucas@BlackHelicopters.org http://www.oreillynet.com/pub/q/Big_Scary_Daemons Absolute BSD: http://www.nostarch.com/abs_bsd.htm To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-doc" in the body of the message
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