Re: [Doh] [Ext] DNS over HTTP/3?

Ted Lemon <mellon@fugue.com> Mon, 19 November 2018 20:13 UTC

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From: Ted Lemon <mellon@fugue.com>
Date: Mon, 19 Nov 2018 15:12:25 -0500
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To: ask@develooper.com
Cc: bert hubert <bert.hubert@powerdns.com>, Paul Hoffman <paul.hoffman@icann.org>, DoH WG <doh@ietf.org>
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Subject: Re: [Doh] [Ext] DNS over HTTP/3?
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What new DNS features require a session?

On Mon, Nov 19, 2018 at 2:18 PM Ask Bjørn Hansen <ask@develooper.com> wrote:

>
>
> On Nov 19, 2018, at 7:12 , bert hubert <bert.hubert@powerdns.com> wrote:
>
> My personal observation is that on a slightly bad network, turning off DoH
> speeds up things massively and makes the web useable again.  This naively
> makes sense, DoH uses way more packets and suffers from Head of Line
> blocking, unlike plain DNS.
>
>
> Wouldn’t comparing to DNS-over-TLS be a more relevant/fair comparison?
>
> DoH makes sense, I believe, if you need a long-lived/persistent connection
> because we get to take advantage of improvements in HTTP/3, etc, without
> “extra DNS work”.
>
> If you don’t need a session (or encryption) or compare with clients that
> don’t, that’s never going to look favorable.
>
> Many new DNS features require a session so as those gain adoption DoH
> should look more favorable.
>
>
> Ask
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