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Re: [DNSOP] Call for Adoption: draft-wkumari-dnsop-extended-error

Tony Finch <dot@dotat.at> Wed, 02 August 2017 14:12 UTC

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Date: Wed, 02 Aug 2017 15:12:37 +0100
From: Tony Finch <dot@dotat.at>
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Subject: Re: [DNSOP] Call for Adoption: draft-wkumari-dnsop-extended-error
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Viktor Dukhovni <ietf-dane@dukhovni.org> wrote:
> On Mon, Jul 31, 2017 at 05:11:07PM +0000, Evan Hunt wrote:
>
> > Are there applications specifically trusting AD=1 and behaving differently
> > than with AD=0?
>
> On Mon, Jul 31, 2017 at 02:16:37PM -0400, Paul Wouters wrote:
>
> > Postfix is one but last I knew only when resolv contains localhost.
>
> Not only Postfix, also Exim, and perhaps also Sendmail some day
> if/when DANE support appears there,

And ssh can be configured to use the AD bit for SSHFP authentication.
There are a few alternatives for ssh + DNSSEC and they interact in ways
that are not always ideal - see http://fanf.livejournal.com/130577.html

> The AD bit is exactly the right DNSSEC interface.  All that's
> missing from the traditional libresolv (and not missing from recent
> innovations in res_ninit(), res_nsearch(), ...) is the ability to
> specify the loopback address as the sole resolver in the application.

Yep.

Tony.
-- 
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