> On 21 Dec 2020, at 06:04, Matthew Pounsett <m...@conundrum.com> wrote:
> 
> 
> 
> On Fri, 18 Dec 2020 at 18:08, Nicolas Bock <nicolas.b...@canonical.com> wrote:
> Thanks Mark. Am I correct then that I need to either convince the 
> administrator of that DNS to enable DNSSEC or configure my DNS with 
> `dnssec-validation = no`?
> 
> The upstream administrator isn't required to be validating DNSSEC for this to 
> work, but in order for your DNS server to do DNSSEC validation, their DNS 
> server must be DNSSEC aware enough to be requesting DNSSEC data when it 
> queries the authoritative DNS servers.  Of course, the resilience of the 
> whole thing would also be improved by that server also validating.

Matthew, there is a difference between sometimes getting answers out of a 
forwarder that isn’t validating that validate and a system that is working.  If 
the forwarder is not validating then the system cannot recover from situations 
that a iterative validating resolver can recover from.

It is bad advice to deploy validating clients behind forwarders that are not 
validating.

> If they can't or won't update their server, then yes, you'll either have to 
> disable validation yourself, or select a better upstream.  Personally I'd go 
> looking for a better upstream (or just stop using a forwarder entirely, and 
> do your own direct recursion, if that's possible in your environment).

-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: ma...@isc.org

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