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Re: [DNSOP] New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt

Jim Reid <jim@rfc1035.com> Mon, 26 March 2018 14:48 UTC

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From: Jim Reid <jim@rfc1035.com>
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Date: Mon, 26 Mar 2018 15:47:55 +0100
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To: Ondřej Surý <ondrej@isc.org>
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Subject: Re: [DNSOP] New Version Notification for draft-sury-deprecate-obsolete-resource-records-00.txt
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On 24 Mar 2018, at 20:20, Ondřej Surý <ondrej@isc.org> wrote:
> 
>> It might be a different story if one of those zombie RRtypes required additional processing. None spring to mind though.
> 
> But (most of) those I picked actually *DO*:
> 
> a) compression is allowed, so compliant and non-compliant servers can’t speak together, because non-compliant will just store junk in the RDATA when received from compliant server;
> b) the RDATA needs to be understood and lowercased for canonical form when DNSSEC signing; again you need to *implement* this in DNSSEC Validator as it would cause validation failures if you don't

Fair enough Ondřej. Though I suspect the number of servers that sign or validate MAILA records  (or whatever) can be counted on the number of ears on one hand. :-)

FWIW the sort of additional processing I had in mind were things comparable to resolvers chasing CNAMEs or DNAME rewriting.

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