From owner-freebsd-questions@FreeBSD.ORG  Tue Nov  9 22:45:36 2010
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id DAB2A106564A
	for <freebsd-questions@freebsd.org>;
	Tue,  9 Nov 2010 22:45:36 +0000 (UTC)
	(envelope-from bonomi@mail.r-bonomi.com)
Received: from mail.r-bonomi.com (ns2.r-bonomi.com [204.87.227.129])
	by mx1.freebsd.org (Postfix) with ESMTP id A1FA68FC08
	for <freebsd-questions@freebsd.org>;
	Tue,  9 Nov 2010 22:45:36 +0000 (UTC)
Received: (from bonomi@localhost)
	by mail.r-bonomi.com (8.14.3/rdb1) id oA9MhUS4024084
	for freebsd-questions@freebsd.org; Tue, 9 Nov 2010 16:43:30 -0600 (CST)
Date: Tue, 9 Nov 2010 16:43:30 -0600 (CST)
From: Robert Bonomi <bonomi@mail.r-bonomi.com>
Message-ID: <201011092243.oA9MhUS4024084@mail.r-bonomi.com>
To: freebsd-questions@freebsd.org
Subject: Re: Glue records
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 09 Nov 2010 22:45:36 -0000

> From owner-freebsd-questions@freebsd.org  Mon Nov  8 02:16:44 2010
> From: Jonathan McKeown <j.mckeown@ru.ac.za>
> To: freebsd-questions@freebsd.org
> Date: Mon, 8 Nov 2010 10:18:09 +0200
> Subject: Re: Glue records (was Re: ATTN GARY KLINE)
>
> On Friday 05 November 2010 22:51:01 Robert Bonomi wrote:
> > > From owner-freebsd-questions@freebsd.org  Fri Nov  5 02:26:31 2010
> > > From: Jonathan McKeown <j.mckeown@ru.ac.za>
> > > To: freebsd-questions@freebsd.org
> > > Date: Fri, 5 Nov 2010 10:27:38 +0200
> > > Subject: Glue records (was Re: ATTN GARY KLINE)
> > >
> > > When a nameserver delegates a zone, it's not responsible for any of that
> > > zone's records any more, with two exceptions. It provides NS records to
> > > indicate which nameservers /are/ responsible, and it retains
> > > responsibility for the A records of nameservers inside the zone - and
> > > only those nameservers. (That's glue.)
> > >
> > > There's no way a .com nameserver should be providing A records for hosts
> > > in the .au zone.
> >
> > sure there is.
> >
> >    Domain:  foo.com  (an aussie company)
> >       nameservers   ns1.alicesprings.au, ns2.umelbourneatperth.au
>
> I think we're agreeing violently ;) The nameservers for the .com zone, when 
> asked about foo.com, should reply with the hostnames of the two nameservers. 
> It shouldn't reply with their IP addresses; the only nameservers that can do 
> that are the ones serving the .au zone or the alicesprings.au and 
> umelbourneatperth.au zones.

Ah.  you said "a .com nameserver'.  Thought you meant 'any nameserver in the .com
hirerarchy', as disinct from 'one of the servers for the .com TLD/zone'

Yup, an agreement it is.  the  A records only for hosts within a zone you are
authoritative for, _or_ glure records for a nameservr that is in a zone sub-
delegated from something you are authoritative for.