From owner-freebsd-questions@FreeBSD.ORG Mon Nov 8 08:18:14 2010 Return-Path: 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 49FC0106564A for ; Mon, 8 Nov 2010 08:18:14 +0000 (UTC) (envelope-from j.mckeown@ru.ac.za) Received: from b.mail.ru.ac.za (b.mail.ru.ac.za [IPv6:2001:4200:1010::25:2]) by mx1.freebsd.org (Postfix) with ESMTP id 4783E8FC08 for ; Mon, 8 Nov 2010 08:18:13 +0000 (UTC) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=ru-msa; d=ru.ac.za; h=Received:From:Organization:To:Subject:Date:User-Agent:References:In-Reply-To:X-Face:MIME-Version:Content-Type:Content-Transfer-Encoding:Content-Disposition:Message-Id:X-Virus-Scanned:X-Authenticated-User; b=mB2UMtEO4cxfxgDxVTgK6DKLZMfJTgyGnJ11v1053+H2exUDER6bBel9Vqt4v8imCRnND5/py96VmiqPiVjARXBKDtMQpOrt7GEi9jNWCdV+qsWLvAy2884VuKCVfEzd; Received: from vorkosigan.ru.ac.za ([2001:4200:1010:1058:219:d1ff:fe9f:a932]:57424) by b.mail.ru.ac.za with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.69 (FreeBSD)) (envelope-from ) id 1PFMvZ-000Agw-Tk for freebsd-questions@freebsd.org; Mon, 08 Nov 2010 10:18:09 +0200 From: Jonathan McKeown Organization: Rhodes University To: freebsd-questions@freebsd.org Date: Mon, 8 Nov 2010 10:18:09 +0200 User-Agent: KMail/1.9.10 References: <201011052051.oA5Kp145022389@mail.r-bonomi.com> In-Reply-To: <201011052051.oA5Kp145022389@mail.r-bonomi.com> X-Face: $@VrUx^RHy/}yu]jKf/<4T%/d|F+$j-Ol2"2J$q+%OK1]&/G_S9(=?utf-8?q?HkaQ*=60!=3FYOK=3FY!=27M=60C=0A=09aP=5C9nVPF8Q=7DCilHH8l=3B=7E!4?= =?utf-8?q?2HK6=273lg4J=7Daz?=@1Dqqh:J]M^"YPn*2IWrZON$1+G?oX3@ =?utf-8?q?k=230=0A=0954XDRg=3DYn=5FF-etwot4U=24b?=dTS{i X-Virus-Scanned: b.mail.ru.ac.za (2001:4200:1010::25:2) X-Authenticated-User: s0900137 from vorkosigan.ru.ac.za (2001:4200:1010:1058:219:d1ff:fe9f:a932) using auth_plaintext Subject: Re: Glue records (was Re: ATTN GARY KLINE) X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 08 Nov 2010 08:18:14 -0000 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 > > 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. > They're still wrong to bw whinging about a lack o glue records. > glue is needed _only_ when the nameserver is _in_ the domain it is the > authoritative servr for. > > So, in the above frivolous example, foo.com does *NOT* need any glue > records, but if ns1.alicesprings.au is an authoritative server for > alicesprings.au, then *it* needs a glue record for that domain. Well, the glue record will be ``above the cut'': if .au delegates alicesprings.au, it's the .au nameserver that provides the A record for ns1.alicesprings.au; but, yes.