Re: [DNSOP] Using the SOA in a NXDOMAIN response (Was: [internet-drafts@ietf.org: I-D Action: draft-bortzmeyer-dnsop-nxdomain-cut-00.txt]

"John Levine" <johnl@taugh.com> Fri, 13 November 2015 20:13 UTC

Return-Path: <johnl@taugh.com>
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 5E0871B2DE8 for <dnsop@ietfa.amsl.com>; Fri, 13 Nov 2015 12:13:33 -0800 (PST)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: 0.963
X-Spam-Level:
X-Spam-Status: No, score=0.963 tagged_above=-999 required=5 tests=[BAYES_05=-0.5, HELO_MISMATCH_COM=0.553, HOST_MISMATCH_NET=0.311, J_CHICKENPOX_37=0.6, SPF_PASS=-0.001] autolearn=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 ZPbNC-XmwTrk for <dnsop@ietfa.amsl.com>; Fri, 13 Nov 2015 12:13:32 -0800 (PST)
Received: from miucha.iecc.com (abusenet-1-pt.tunnel.tserv4.nyc4.ipv6.he.net [IPv6:2001:470:1f06:1126::2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id 5BB7C1B2DE7 for <dnsop@ietf.org>; Fri, 13 Nov 2015 12:13:32 -0800 (PST)
Received: (qmail 79805 invoked from network); 13 Nov 2015 20:13:31 -0000
Received: from unknown (64.57.183.18) by mail1.iecc.com with QMQP; 13 Nov 2015 20:13:31 -0000
Date: 13 Nov 2015 20:13:09 -0000
Message-ID: <20151113201309.4991.qmail@ary.lan>
From: "John Levine" <johnl@taugh.com>
To: dnsop@ietf.org
In-Reply-To: <20151113195015.GB32106@sources.org>
Organization:
X-Headerized: yes
Mime-Version: 1.0
Content-type: text/plain; charset=utf-8
Content-transfer-encoding: 8bit
Archived-At: <http://mailarchive.ietf.org/arch/msg/dnsop/XX8aS5m0piHTs3O9bH0ZKAeeefs>
Subject: Re: [DNSOP] Using the SOA in a NXDOMAIN response (Was: [internet-drafts@ietf.org: I-D Action: draft-bortzmeyer-dnsop-nxdomain-cut-00.txt]
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: <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: Fri, 13 Nov 2015 20:13:33 -0000

>It can mean only one thing, that bar.example does not exist. How could
>it be different?

My name server (running NSD) appears to disagree with you.  This is real data, feel
free to poke at it yourself.

$ dig @sdn.iecc.com bogus.www.examp1e.com a

; <<>> DiG 9.8.3-P1 <<>> @sdn.iecc.com bogus.www.examp1e.com a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 9914
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;bogus.www.examp1e.com.		IN	A

;; AUTHORITY SECTION:
examp1e.com.		3600	IN	SOA	ns1.he.net. hostmaster.examp1e.com. 2015111219 10800 900 604800 7200



$ dig @sdn.iecc.com www.examp1e.com a

; <<>> DiG 9.8.3-P1 <<>> @sdn.iecc.com www.examp1e.com a
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9303
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;www.examp1e.com.		IN	A

;; ANSWER SECTION:
www.examp1e.com.	3600	IN	CNAME	ghs.googlehosted.com.