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Re: [DNSOP] Mirja Kühlewind's Yes on draft-ietf-dnsop-refuse-any-07: (with COMMENT)

Tony Finch <dot@dotat.at> Fri, 14 September 2018 11:26 UTC

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Date: Fri, 14 Sep 2018 12:26:04 +0100
From: Tony Finch <dot@dotat.at>
To: 神明達哉 <jinmei@wide.ad.jp>
cc: ietf@kuehlewind.net, Tim Wicinski <tjw.ietf@gmail.com>, draft-ietf-dnsop-refuse-any@ietf.org, dnsop-chairs@ietf.org, Ólafur Guðmundsson <olafur@cloudflare.com>, The IESG <iesg@ietf.org>, dnsop <dnsop@ietf.org>
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Subject: Re: [DNSOP] Mirja Kühlewind's Yes on draft-ietf-dnsop-refuse-any-07: (with COMMENT)
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神明達哉 <jinmei@wide.ad.jp> wrote:
>
> Whether we *SHOULD* (rather than MAY) allow the conventional response
> in case of TCP is a different question, on which I don't have a strong
> opinion.

I think at the moment it is mostly harmless and sometimes helpful for
debugging or inspection - e.g. `dig` switches to TCP by default for ANY
queries to avoid confusing users with partial answers, so it makes use of
this SHOULD.

If I look into my crystal ball at a future where resolvers query auth
servers over TLS, then the balance might change. Maybe at that point it'll
be better for resolvers to implement refuse-any rather than relying on
auth servers to do it for them; or maybe it'll be better to do
refuse-any over all transports. Dunno :-)

Tony.
-- 
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