Re: [Driu] [Ext] How to describe various flavors of DNS resolvers

Paul Hoffman <paul.hoffman@icann.org> Tue, 15 May 2018 14:51 UTC

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From: Paul Hoffman <paul.hoffman@icann.org>
To: Erik Kline <ek@google.com>
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Thread-Topic: [Ext] [Driu] How to describe various flavors of DNS resolvers
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Date: Tue, 15 May 2018 14:51:32 +0000
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Subject: Re: [Driu] [Ext] How to describe various flavors of DNS resolvers
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On May 14, 2018, at 9:46 PM, Erik Kline <ek@google.com> wrote:
> I'm not sure I understand the benefit of trying to provide this extra
> information.  I think clients will need to probe nameservers for their
> capabilities.
> 
> Do we think TLS-only nameservers are a likely operational model?

"Probe for DNS-over-TLS" is a possible outcome, but yes, there are parties who *only* want to provide privacy-enhanced resolvers. In the DOH WG, there has also been discussion of how to prevent downgrade attacks from privacy-enhanded to clear-on-port-53.

--Paul Hoffman