Re: [DNSOP] ALT-TLD and (insecure) delgations.

Tony Finch <dot@dotat.at> Wed, 08 February 2017 11:26 UTC

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Date: Wed, 8 Feb 2017 11:26:28 +0000
From: Tony Finch <dot@dotat.at>
To: Stephane Bortzmeyer <bortzmeyer@nic.fr>
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Cc: "dnsop@ietf.org WG" <dnsop@ietf.org>, Ted Lemon <mellon@fugue.com>, Brian Dickson <brian.peter.dickson@gmail.com>
Subject: Re: [DNSOP] ALT-TLD and (insecure) delgations.
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Stephane Bortzmeyer <bortzmeyer@nic.fr> wrote:
> Mark Andrews <marka@isc.org> wrote:
> > Ted Lemon <mellon@fugue.com> wrote:
> > >
> > > If it has proof of non-existence for .alt cached, it doesn't need
> > > to ask any further questions to deny the existence of any
> > > subdomain of .alt.
> >
> > Which assumes agggressive negative caching.
>
> If by "aggressive negative caching", you mean
> draft-ietf-dnsop-nsec-aggressiveuse, then I disagree with you: it is
> *not* necessary (since the name is the same), you just need RFC 8020
> support.

For RFC 8020 to suppress these .alt leaked queries properly, you also need
qname minimization.

Tony.
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