Re: [Doh] special meta QTYPEs

Martin Thomson <> Fri, 08 June 2018 13:51 UTC

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From: Martin Thomson <>
Date: Fri, 8 Jun 2018 15:51:39 +0200
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To: Tony Finch <>
Cc:, DoH WG <>
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Subject: Re: [Doh] special meta QTYPEs
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On Fri, Jun 8, 2018 at 3:38 PM Tony Finch <>; wrote:
> I was speaking in general terms, of course :-) An AXFR client has to be
> prepared to handle multiple messages in a response, regardless of the size
> of the zone, so a DoH proxy that tries to support AXFR cannot avoid
> learning how to cope with multi-message answers from its upstream DNS
> server. And it isn't always possible to de-fragment an AXFR response: e.g.
> it will break any TSIG authentication.

That's interesting.  Are you saying that a multi-message answer that
is TSIG authenticated cannot be carried in DOH?  I think that's what
this means.  Would it require the use of something like
multipart/related to faithfully carry the answer in that case?