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Re: [Doh] DNS over HTTP/3?

Az Mankin <azmankin@gmail.com> Fri, 23 November 2018 03:43 UTC

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From: Az Mankin <azmankin@gmail.com>
Date: Thu, 22 Nov 2018 22:43:30 -0500
Message-ID: <CAJD5LR2nRQPiqCcmmdmxbEKoWvh6eNF7eUo2PmPusNySriUYdg@mail.gmail.com>
To: bert hubert <bert.hubert@powerdns.com>
Cc: doh@ietf.org
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Subject: Re: [Doh] DNS over HTTP/3?
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Bert,

>In other words, to the sound of a groaning >camel, do we need a draft? Or a
>section in the HTTP/3 I-D?

Please take a look at
draft-huitema-quic-dnsoquic-05

It was introduced in the QUIC WG and revised as QUIC evolved (and as some
prototype stacks by the authors gave results).  It needs a refresh now.
QUIC made it low priority while working on the HTTP transport.

On Mon, Nov 19, 2018 at 5:10 AM bert hubert <bert.hubert@powerdns.com>
wrote:

> Hi everyone,
>
> Now that we are still here, perhaps some work is left for us, but I'm not
> sure.
>
> I've observed that the thousands of users of doh.powerdns.org (I also do
> not
> know how this happened) take around 22 packets per DNS query/response.
>
> Larger scale adoption of TLSv1.3 might improve this somewhat, but it is a
> big number.
>
> I've also personally observed that a "slightly suboptimal" network
> absolutely kills browsing performance in Firefox Nightly using DoH.  A
> naive
> calculation shows that 0.5% packet loss turns into a 5% failure rate per
> DoH
> query, which then can cause Head of Line blocking for further queries,
> which
> cascades into "blank pages" getting rendered.
>
> Of course, once we have HTTP/3, DNS over HTTP/3 would suffer way less from
> incidental packet loss, and in general there would be a lot less packets
> too.
>
> My question now is, is there any specific work to be done for DoH/3? Are
> there number, priorities, features you'd want or not want to use to make
> things work well?
>
> In other words, to the sound of a groaning camel, do we need a draft? Or a
> section in the HTTP/3 I-D?
>
> And, perhaps somewhat more provocatively, should we maybe not start pushing
> DoH/2 if it leaves people with a sub-standard experience, causing them to
> disable DoH?  DoH/3 might be somewhat of a wait but it might prevent that
> sour taste from developing.
>
> I'd love to hear your thoughts!
>
>         Bert
>
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