From owner-freebsd-doc Mon May 6 6: 3:17 2002 Delivered-To: freebsd-doc@freebsd.org Received: from blackhelicopters.org (geburah.blackhelicopters.org [209.69.178.18]) by hub.freebsd.org (Postfix) with ESMTP id 819EA37B403 for ; Mon, 6 May 2002 06:03:11 -0700 (PDT) Received: (from mwlucas@localhost) by blackhelicopters.org (8.11.6/8.11.6) id g46D38Z20421; Mon, 6 May 2002 09:03:08 -0400 (EDT) (envelope-from mwlucas) Date: Mon, 6 May 2002 09:03:08 -0400 From: Michael Lucas To: Ceri Davies Cc: doc@FreeBSD.ORG Subject: Re: Advanced Networking Question Message-ID: <20020506090308.A20367@blackhelicopters.org> References: <20020506124528.GA7841@submonkey.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20020506124528.GA7841@submonkey.net>; from setantae@submonkey.net on Mon, May 06, 2002 at 01:45:28PM +0100 Sender: owner-freebsd-doc@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org 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 : > > Dual Homed Hosts > dual homed hosts > 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. > > 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. > > 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. > > 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