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Re: [dnsext] WG opinion on draft : Improvements to DNS Resolvers, for Resiliency, Robustness, and Responsiveness

Florian Weimer <fweimer@bfk.de> Wed, 23 February 2011 09:52 UTC

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To: "W.C.A. Wijngaards" <wouter@NLnetLabs.nl>
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From: Florian Weimer <fweimer@bfk.de>
Date: Wed, 23 Feb 2011 09:53:36 +0000
In-Reply-To: <4D63907A.8010700@nlnetlabs.nl> (W. C. A. Wijngaards's message of "Tue\, 22 Feb 2011 11\:31\:22 +0100")
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Subject: Re: [dnsext] WG opinion on draft : Improvements to DNS Resolvers, for Resiliency, Robustness, and Responsiveness
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* W. C. A. Wijngaards:

> I do not think you could enable this by default today, because very old
> software might still have bugs in handling empty nonterminals and send
> NXDOMAINs for them.

A lot of DNSBLs are hosted on servers which send NXDOMAIN for empty
non-terminals.

I don't think this change is worth the effort.  I would rather prefer
official blessing of NXDOMAIN synthesis from NSEC/NSEC3 records.  This
would be both more deterministic and more effective.

-- 
Florian Weimer                <fweimer@bfk.de>
BFK edv-consulting GmbH       http://www.bfk.de/
Kriegsstraße 100              tel: +49-721-96201-1
D-76133 Karlsruhe             fax: +49-721-96201-99

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