IETF Logo Mail Archive

Re: [DNSOP] fyi [Pdns-users] Please test: ALIAS/ANAME apex record in PowerDNS

Tony Finch <dot@dotat.at> Mon, 22 September 2014 11:27 UTC

Return-Path: <fanf2@hermes.cam.ac.uk>
X-Original-To: dnsop@ietfa.amsl.com
Delivered-To: dnsop@ietfa.amsl.com
Received: from localhost (ietfa.amsl.com [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 7F7E91A1A45 for <dnsop@ietfa.amsl.com>; Mon, 22 Sep 2014 04:27:37 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -4.986
X-Spam-Level:
X-Spam-Status: No, score=-4.986 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_DNSWL_MED=-2.3, RP_MATCHES_RCVD=-0.786] autolearn=ham
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id ZeOBvQ8ZwClg for <dnsop@ietfa.amsl.com>; Mon, 22 Sep 2014 04:27:36 -0700 (PDT)
Received: from ppsw-52.csi.cam.ac.uk (ppsw-52.csi.cam.ac.uk [131.111.8.152]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id BEA531A007E for <dnsop@ietf.org>; Mon, 22 Sep 2014 04:27:35 -0700 (PDT)
X-Cam-AntiVirus: no malware found
X-Cam-ScannerInfo: http://www.cam.ac.uk/cs/email/scanner/
Received: from hermes-1.csi.cam.ac.uk ([131.111.8.51]:32989) by ppsw-52.csi.cam.ac.uk (smtp.hermes.cam.ac.uk [131.111.8.159]:25) with esmtpa (EXTERNAL:fanf2) id 1XW1mH-0000Hq-Fq (Exim 4.82_3-c0e5623) (return-path <fanf2@hermes.cam.ac.uk>); Mon, 22 Sep 2014 12:27:33 +0100
Received: from fanf2 by hermes-1.csi.cam.ac.uk (hermes.cam.ac.uk) with local id 1XW1mH-0000f2-Rv (Exim 4.72) (return-path <fanf2@hermes.cam.ac.uk>); Mon, 22 Sep 2014 12:27:33 +0100
Date: Mon, 22 Sep 2014 12:27:33 +0100
From: Tony Finch <dot@dotat.at>
X-X-Sender: fanf2@hermes-1.csi.cam.ac.uk
To: Dick Franks <rwfranks@acm.org>
In-Reply-To: <CAKW6Ri7HYB0BdHGJG9aTXs3=JP4wG1B5uZpk7Y0S60XGAXayQw@mail.gmail.com>
Message-ID: <alpine.LSU.2.00.1409221223281.3000@hermes-1.csi.cam.ac.uk>
References: <20140921115222.GB16178@xs.powerdns.com> <541F1AE8.6010709@redbarn.org> <alpine.LSU.2.00.1409221047520.3000@hermes-1.csi.cam.ac.uk> <CAKW6Ri7HYB0BdHGJG9aTXs3=JP4wG1B5uZpk7Y0S60XGAXayQw@mail.gmail.com>
User-Agent: Alpine 2.00 (LSU 1167 2008-08-23)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset="US-ASCII"
Sender: Tony Finch <fanf2@hermes.cam.ac.uk>
Archived-At: http://mailarchive.ietf.org/arch/msg/dnsop/UcZaQro-LDmZJFWnAiaOFn1VYlU
Cc: dnsop@ietf.org
Subject: Re: [DNSOP] fyi [Pdns-users] Please test: ALIAS/ANAME apex record in PowerDNS
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: IETF DNSOP WG mailing list <dnsop.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/dnsop>, <mailto:dnsop-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/dnsop/>
List-Post: <mailto:dnsop@ietf.org>
List-Help: <mailto:dnsop-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/dnsop>, <mailto:dnsop-request@ietf.org?subject=subscribe>
X-List-Received-Date: Mon, 22 Sep 2014 11:27:37 -0000

Dick Franks <rwfranks@acm.org> wrote:
> On 22 September 2014 11:03, Tony Finch <dot@dotat.at> wrote:
> >
> > (1) Master-only. The master observes an ANAME record at the apex of a zone
> > it loads and uses it to periodically refresh the relevant records in the
> > zone (as if you had a cron job running dig | magic | nsupdate).
> >
> > Disadvantage: potentially lots of XFR traffic if the TTLs are low.
>
> Why would TTL be relevant here?
>
> Is the master not acting as a "partial slave" for the target RRs?
> In which case, the timing should depend on the SOA refresh period.

Yes, you could do it that way. But a lot of people want changes to take
effect quickly.

And I forgot to cover the effects that client-subnet might have ...

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/
Trafalgar: Cyclonic in northwest, otherwise mainly northerly or northwesterly
5 or 6. Slight or moderate. Showers in northwest. Good.

v2.23.0 | Report a Bug | By Email