Re: [dane] An AD bit discussion

Tony Finch <dot@dotat.at> Wed, 26 February 2014 19:02 UTC

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Date: Wed, 26 Feb 2014 19:02:45 +0000
From: Tony Finch <dot@dotat.at>
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Subject: Re: [dane] An AD bit discussion
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Viktor Dukhovni <viktor1dane@dukhovni.org>; wrote:
>
> I think it requires EDNS0,

The AD bit is in the message header not the OPT pseudo-RR, so
syntactically it doesn't require EDNS0. BIND works OK (try
dig +qr +noedns). However the spec is silent on this matter.
http://tools.ietf.org/html/rfc6840#page-10
Also I think it is arguable that RFC 4035 says servers should set the
AD flag in the response regardless of whether the client indicates
it is security-aware. But implementations do not do that.

Tony.
-- 
f.anthony.n.finch  <dot@dotat.at>;  http://dotat.at/
Lundy, Fastnet, Irish Sea: South veering west 6 to gale 8, occasionally severe
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