Re: [DNSOP] New draft for ALIAS/ANAME type

Tony Finch <dot@dotat.at> Mon, 03 April 2017 11:55 UTC

Return-Path: <dot@dotat.at>
X-Original-To: dnsop@ietfa.amsl.com
Delivered-To: dnsop@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id 030FF1250B8 for <dnsop@ietfa.amsl.com>; Mon, 3 Apr 2017 04:55:54 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.921
X-Spam-Level:
X-Spam-Status: No, score=-1.921 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_PASS=-0.001] autolearn=ham autolearn_force=no
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 ZnnR1IdHmEqQ for <dnsop@ietfa.amsl.com>; Mon, 3 Apr 2017 04:55:51 -0700 (PDT)
Received: from ppsw-32.csi.cam.ac.uk (ppsw-32.csi.cam.ac.uk [131.111.8.132]) (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 B373312947E for <dnsop@ietf.org>; Mon, 3 Apr 2017 04:55:51 -0700 (PDT)
X-Cam-AntiVirus: no malware found
X-Cam-ScannerInfo: http://help.uis.cam.ac.uk/email-scanner-virus
Received: from grey.csi.cam.ac.uk ([131.111.57.57]:57175) by ppsw-32.csi.cam.ac.uk (ppsw.cam.ac.uk [131.111.8.136]:25) with esmtps (TLSv1:ECDHE-RSA-AES256-SHA:256) id 1cv0aL-0004G3-0e (Exim 4.89) (return-path <dot@dotat.at>); Mon, 03 Apr 2017 12:55:49 +0100
Date: Mon, 03 Apr 2017 12:55:49 +0100
From: Tony Finch <dot@dotat.at>
To: Peter van Dijk <peter.van.dijk@powerdns.com>
cc: dnsop@ietf.org
In-Reply-To: <9232F4F4-772F-48AA-80FB-C990662AFD7A@powerdns.com>
Message-ID: <alpine.DEB.2.11.1704031253200.13590@grey.csi.cam.ac.uk>
References: <20170330230806.6273.qmail@ary.lan> <9232F4F4-772F-48AA-80FB-C990662AFD7A@powerdns.com>
User-Agent: Alpine 2.11 (DEB 23 2013-08-11)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset="US-ASCII"
Archived-At: <https://mailarchive.ietf.org/arch/msg/dnsop/9ms6TxAw8foqEo_VikfqDB1X4mY>
Subject: Re: [DNSOP] New draft for ALIAS/ANAME type
X-BeenThere: dnsop@ietf.org
X-Mailman-Version: 2.1.22
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: <https://mailarchive.ietf.org/arch/browse/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, 03 Apr 2017 11:55:54 -0000

Peter van Dijk <peter.van.dijk@powerdns.com> wrote:
>
> There are PowerDNS ALIAS deployments that signs offline (for some
> stretch of the definition of offline) - every minute. For small zones
> the NOTIFY+XFR overhead is very tolerable, and the public auths do not
> need the private key data.

If you expand ALIAS on the master server like this, I would expect that
most of the time the target addresses won't change very frequently, so the
IXFR rate should be much less than the ALIAS polling frequency.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>  http://dotat.at/  -  I xn--zr8h punycode
Humber, Thames: South or southwest, veering northwest later, 5 or 6. Slight,
occasionally moderate in Humber. Fog patches, rain later. Moderate,
occasionally very poor.