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Re: [DNSOP] New draft on delegation revalidation

Tim Wicinski <tjw.ietf@gmail.com> Fri, 10 April 2020 15:53 UTC

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From: Tim Wicinski <tjw.ietf@gmail.com>
Date: Fri, 10 Apr 2020 11:52:54 -0400
Message-ID: <CADyWQ+Gugw5ScSGDhDWLvrMQB-nNS+cOAcETQ9ssf2wPMFYq3w@mail.gmail.com>
To: Shumon Huque <shuque@gmail.com>
Cc: "dnsop@ietf.org WG" <dnsop@ietf.org>
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Subject: Re: [DNSOP] New draft on delegation revalidation
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(as a chair)

I enjoyed reading the thread on dns-operations, and as a chair,
both Benno and we like where this is going.

(consider this a gentle nudge working group this is relevant to
our interests)

thanks Shumon/Ralph/Paul

tim




On Fri, Apr 10, 2020 at 9:46 AM Shumon Huque <shuque@gmail.com> wrote:

> Hi folks,
>
> Paul Vixie, Ralph Dolmans, and I have submitted this I-D for
> consideration:
>
>    https://tools.ietf.org/html/draft-huque-dnsop-ns-revalidation-01
>
> I mentioned it on the dns-operations@dns-oarc.net mailing
> list last week, where the topic came up in another thread,
> and there has already been some lively discussion about it
> there. So we recommend reading the thread there:
>
>
> https://lists.dns-oarc.net/pipermail/dns-operations/2020-April/020041.html
>
> There is a range of different behaviors in resolver implementations
> in this respect today, and it would be good if we could agree on
> more commonality.
>
> The main recommendations in the draft are to: (1) deterministically
> prefer the authoritative child NS set over the non-authoritative,
> unsigned, delegating NS set in the parent, (2) revalidate the parent
> delegation at the expiration of the parent NS set TTL, to promptly
> detect when the parent has re-delegated the zone elsewhere (or
> removed the delegation).
>
> These are not new ideas of course. They have been proposed in Vixie
> et. al.'s resimprove draft from 2010, and Wouter Wijngaard's resolver
> mitigations draft from 2009. The Unbound resolver already mostly
> implements this with the 'harden-referral-path' configuration option.
>
> Comments/discussion welcome.
>
> Shumon, Paul, and Ralph.
>
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