Re: [DNSOP] Using the SOA in a NXDOMAIN response (Was: [internet-drafts@ietf.org: I-D Action: draft-bortzmeyer-dnsop-nxdomain-cut-00.txt]
"Wessels, Duane" <dwessels@verisign.com> Fri, 13 November 2015 21:04 UTC
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From: "Wessels, Duane" <dwessels@verisign.com>
To: Stephane Bortzmeyer <bortzmeyer@nic.fr>
Thread-Topic: Using the SOA in a NXDOMAIN response (Was: [internet-drafts@ietf.org: I-D Action: draft-bortzmeyer-dnsop-nxdomain-cut-00.txt]
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Date: Fri, 13 Nov 2015 21:03:52 +0000
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References: <20151106082238.GA2307@nic.fr> <A62EC834-C954-446C-9F7A-AB6D1F955C7F@verisign.com> <20151112081514.GA16017@laperouse.bortzmeyer.org> <39D878B4-9239-4983-8083-36BCA365BE62@verisign.com> <20151113195015.GB32106@sources.org>
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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]
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> On Nov 13, 2015, at 11:50 AM, Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote: > > On Thu, Nov 12, 2015 at 06:13:04PM +0000, > Wessels, Duane <dwessels@verisign.com> wrote > a message of 57 lines which said: > >> As Mark pointed out, we can't use the SOA to make NXDOMAIN more aggressive. >> >> For a name like foo.bar.example.com and an NXDOMAIN response from >> example.com we can't assume that there would be a zone cut between >> foo and bar. > > Could anyone explain in detail why is it so? [I don't understand why > the zone cut is important here: using the SOA does not depend on > whether there is a zone cut or not.] > > Let's say I query foo.bar.example to example's name servers. I get: > > ... > ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 64182 > ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 8, ADDITIONAL: 1 > ... > ;; QUESTION SECTION: > ;foo.bar.example. IN SOA > ... > > example. 5400 IN SOA nsmaster.nic.example. hostmaster.nic.example. ( > 2222956935 ; serial > 3600 ; refresh (1 hour) > .... > > It can mean only one thing, that bar.example does not exist. How could > it be different? > If 'bar.example IN A 127.0.0.1' existed in the example zone, what would you expect for the response to your query above? DW
- [DNSOP] [internet-drafts@ietf.org: I-D Action: dr… Stephane Bortzmeyer
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Wessels, Duane
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Mark Andrews
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Mark Andrews
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Stephane Bortzmeyer
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Paul Hoffman
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Wessels, Duane
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Mark Andrews
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Stephane Bortzmeyer
- [DNSOP] Using the SOA in a NXDOMAIN response (Was… Stephane Bortzmeyer
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Stephane Bortzmeyer
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Stephane Bortzmeyer
- Re: [DNSOP] Using the SOA in a NXDOMAIN response … John Levine
- Re: [DNSOP] Using the SOA in a NXDOMAIN response … Wessels, Duane
- Re: [DNSOP] [internet-drafts@ietf.org: I-D Action… Tony Finch