PowerDNS Authoritative Server, PowerDNS Recursor, PowerDNS dnsdist:

* IP_PMTUDISC_OMIT with fallback to IP_PMTUDISC_DONT
* default EDNS buffer size of 1232, no probing for smaller sizes
* no handling of EMSGSIZE
* Recursor: UDP timeouts do not cause a switch to TCP. "Spoofing
nearmisses" do.

PowerDNS Authoritative Server:

* the default DNSSEC algorithm is 13
* responses are minimal, this is not configurable

Kind regards,
-- 
Peter van Dijk
PowerDNS.COM BV - https://www.powerdns.com/

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