Date: Tue, 9 Nov 2010 16:43:30 -0600 (CST) From: Robert Bonomi <bonomi@mail.r-bonomi.com> To: freebsd-questions@freebsd.org Subject: Re: Glue records Message-ID: <201011092243.oA9MhUS4024084@mail.r-bonomi.com>
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> 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.
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