[dns-operations] signing a zone with NSEC3 records.

[Florian Weimer]

* Mark Andrews:

> In message <82my52dhda.fsf at mid.bfk.de>, Florian Weimer writes:
>> * bert hubert:
>> 
>> > Also, NSEC3 significantly increases the size of NXDOMAIN responses
>> > (which need 3 NSEC3 records, plus associated signatures).This increase
>> > will often push the datagram carrying a response beyond the point
>> > where it needs to be fragmented over several packets.
>> 
>> On the other hand, NSEC3 *decreases* the size of QTYPE=3DANY responses
>> from resolvers for unsigned delegations.  This may be beneficial to
>> certain legacy MTAs.  (But I guess the days to pay respect to those
>> poor MTAs are finally over.)
>
> How do you come to that conclusion?

Looking at packets?

> % dig +dnssec any abc.org @B0.ORG.AFILIAS-NST.org.

The relevant case is DO=0.  Then the NSEC3 records aren't included
because their owner name doesn't match.

-- 
Florian Weimer                <fweimer at bfk.de>
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