Re: [DNSOP] [Doh] [EXTERNAL] Re: New I-D: draft-reid-doh-operator

tirumal reddy <kondtir@gmail.com> Tue, 26 March 2019 08:56 UTC

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From: tirumal reddy <kondtir@gmail.com>
Date: Tue, 26 Mar 2019 09:56:36 +0100
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To: Tony Finch <dot@dotat.at>
Cc: Ted Lemon <mellon@fugue.com>, "dnsop@ietf.org" <dnsop@ietf.org>, "doh@ietf.org" <doh@ietf.org>
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Subject: Re: [DNSOP] [Doh] [EXTERNAL] Re: New I-D: draft-reid-doh-operator
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On Mon, 25 Mar 2019 at 16:05, Tony Finch <dot@dotat.at>; wrote:

> Ted Lemon <mellon@fugue.com>; wrote:
>
> > This is equally an argument for doing DNS over DTLS. This would give
> > similar performance to DoH over QUIC.
>
> If I understand it correctly, DTLS leaves MTU and fragmentation up to the
> application protocol. The DNS has horrible packet size problems, so it
> needs a lot more help than DTLS provides. QUIC is much better.
>

We had a proposal in our draft
https://tools.ietf.org/html/draft-ietf-dprive-dnsodtls-02#section-9 to
handle fragmentation and reassembly but due to lack of support, it was
removed in the next revision.
If there is renewed interest in DNS-over-DTLS, we can submit a new draft
discussing the fragmentation and reassembly procedure.

Cheers,
-Tiru



> Tony.
> --
> f.anthony.n.finch  <dot@dotat.at>;  http://dotat.at/
> The Minch: Westerly 4 or 5, backing southwesterly 5 or 6, occasionally 7
> later
> in north. Rough in far north and in far south, otherwise slight or
> moderate.
> Occasional drizzle. Good, occasionally poor.
>
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