Re: [Doh] [Ext] Re: Associating a DoH server with a resolver

Paul Hoffman <paul.hoffman@icann.org> Wed, 24 October 2018 16:19 UTC

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From: Paul Hoffman <paul.hoffman@icann.org>
To: Adam Roach <adam@nostrum.com>
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Thread-Topic: [Doh] [Ext] Re: Associating a DoH server with a resolver
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Date: Wed, 24 Oct 2018 16:19:14 +0000
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Subject: Re: [Doh] [Ext] Re: Associating a DoH server with a resolver
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On Oct 23, 2018, at 8:39 PM, Adam Roach <adam@nostrum.com> wrote:
> If we are going for non-A/AAAA record types, then I would suggest that we use the record to directly indicate the URI instead of having to synthesize one using a .well-known path. I would also point out that we already have a resource record type for converting desired services into URIs (RFC 7553).
> 
> So, e.g., interested clients would query for a URI record of type _doh._tcp.resolvers.arpa, and get back a full HTTPS URL as a response.

Using the URI RRtype is a possibility as long as we are sure that all the APIs that allow sending names with underscores (that is, names that are not hostnames). If not, then TXT or a new purpose-based RRtype that is like TXT would be better.

--Paul Hoffman