Re: [dns-privacy] DoH vs DoT at IMC 2019

Puneet Sood <puneets@google.com> Mon, 23 September 2019 14:59 UTC

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From: Puneet Sood <puneets@google.com>
Date: Mon, 23 Sep 2019 10:58:44 -0400
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Subject: Re: [dns-privacy] DoH vs DoT at IMC 2019
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On Thu, Sep 12, 2019 at 4:58 AM Petr Špaček <petr.spacek@nic.cz>; wrote:
>
> On 12. 09. 19 7:37, Rob Sayre wrote:
> > On Wed, Sep 11, 2019 at 2:53 AM Timm Boettger <timm.boettger@qmul.ac.uk <mailto:timm.boettger@qmul.ac.uk>> wrote:
> >
> >     Hi all,
> >
> >     Rob Sayre has pointed me to this thread. I am an author of the linked paper...
> >
> >     He has pointed out some confusing and outdated information in the paper, that I would like to clarify...
> >
> >
> > Let me further clarify: I thought these were minor corrections, and I didn't want these small flaws to undermine a great point the paper made in its Section 3:
> >
> > "Implementing out-of-order delivery via TLS is akin to (re-)implementing the stream multiplexing part of SCTP, QUIC or HTTP/2.0."
>
> It should be noted that out-of-order query processing is in no way unique to TLS, it is the same for TCP (see RFC 5966 section 6).

The Google Public DNS DoT implementation supports out-of-order
responses so I am surprised that your experiment found that only
CloudFlare's implementation supports out-of-order delivery. Maybe this
is changed in the updated version of your report.

-Puneet



>
> It should also be noted that Knot Resolver (which I'm working on), BIND and also modern versions of Unbound _do_ support out-of-order query processing so the point above it moot. (I'm not sure about PowerDNS but I would be surprised if it did not have out-of-order processing support as well.)
>
> Missing support on a particular service is not caused by lack of implementations in servers, maybe it is a problem "added" by layers on top.
>
> Petr Špaček  @  CZ.NIC
>
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