unbound asks for A record, when txt requested

Paul Vixie paul at redbarn.org
Fri Sep 13 08:27:52 UTC 2019

Petr Špaček via Unbound-users wrote on 2019-09-13 01:15:
> ...
> Any implementation which is unable to respond to well-formed queries
> is just broken and there is no excuse for it.

in DNS RRL (www.redbarn.org/dns/ratelimits) a motive and a method is 
described whereby queries which appear to be uselessly duplicative are 
dropped without response. this is the main method of managed 
nonparticipation in DNS-amplified DDoS attacks.

perhaps this is exempted from your otherwise broad statement, since the 
implementation of DNS RRL does not render an implementation "unable" to 
respond to all well-formed queries, but rather, "unwilling" to do so.

P Vixie

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