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

Ask Bjørn Hansen <ask@develooper.com> Mon, 19 November 2018 19:18 UTC

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From: Ask Bjørn Hansen <ask@develooper.com>
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Cc: Paul Hoffman <paul.hoffman@icann.org>, "doh@ietf.org" <doh@ietf.org>
To: bert hubert <bert.hubert@powerdns.com>
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Subject: Re: [Doh] [Ext] DNS over HTTP/3?
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> 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.


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