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Re: [dispatch] Working Group Proposal: DNS Over HTTPS

Ben Schwartz <bemasc@google.com> Thu, 10 August 2017 19:53 UTC

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From: Ben Schwartz <bemasc@google.com>
Date: Thu, 10 Aug 2017 15:53:09 -0400
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To: Stephen Farrell <stephen.farrell@cs.tcd.ie>
Cc: John R Levine <johnl@taugh.com>, Dispatch WG <dispatch@ietf.org>
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Subject: Re: [dispatch] Working Group Proposal: DNS Over HTTPS
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On Thu, Aug 10, 2017 at 3:40 PM, Stephen Farrell <stephen.farrell@cs.tcd.ie>
wrote:

>
>
> On 10/08/17 19:29, John R Levine wrote:
> > On Thu, 10 Aug 2017, Stephen Farrell wrote:
> >> If however, a random web site were to be able to get a http
> >> client like a browser to believe lies about dns then that'd
> >> be much worse than today, if those lies affect more than the
> >> web pages that the fibbing web site can control anyway.
> >
> > I don't see what the problem is.  This is just a way to encapsulate DNS
> > queries in http, typically from a javascript routine running in a
> > browser. Unless browsers work very differently from the way I think they
> > do, this is not a way to patch a browser's DNS lookup code.
>
> I don't know what you mean by that last tbh.
>
> The problem I'm trying to describe is touched on in the
> last para of the draft's security considerations.
>

I agree that paragraph is a bit out of place in this draft, but I think the
text is just trying to agree with you.  It's implicitly describing a
hypothetical scenario (browsers flinging DNS queries to any web server they
bump into) in order to say DON'T DO THAT.

I think we can clarify the wording there, and also possibly write a charter
that explicitly excludes any change to how DNS clients choose recursive
resolvers.


> >
> >> As an aside, I'm puzzled a bit by how CORS comes into this.
> >
> > CORS?
>
> Yes. The mention of that in the draft we're discussing is
> a bit of a puzzle to me. Hopefully you didn't read some
> other draft:-)
>
> S.
>
> >
> > Regards,
> > John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
> > Please consider the environment before reading this e-mail.
> https://jl.ly
> >
>
>
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