dynect.net outage

[Simon Arlott]

I currently have this cached list of nameservers for dynect.net:

;; AUTHORITY SECTION:
dynect.net.		14931	IN	NS	cgydc01dnsext01.us.oracle.com.
dynect.net.		14931	IN	NS	tvp02dnsext02.tvp.oracle.com.
dynect.net.		14931	IN	NS	sydc01dns03.au.oracle.com.
dynect.net.		14931	IN	NS	trdc01dnsext01.us.oracle.com.
dynect.net.		14931	IN	NS	adc08dnsext02.us.oracle.com.
dynect.net.		14931	IN	NS	rmdc02dnsext01.us.oracle.com.
dynect.net.		14931	IN	NS	llg07dnsext02.llg.oracle.com.
dynect.net.		14931	IN	NS	llg07dnsext01.llg.oracle.com.
dynect.net.		14931	IN	NS	iad-dns-master.oraclecorp.com.
dynect.net.		14931	IN	NS	adc08dnsext01.us.oracle.com.
dynect.net.		14931	IN	NS	rmdc02dnsext02.us.oracle.com.
;; WHEN: Fri May 27 17:10:08 BST 2022

All of these hostnames are NXDOMAIN in the oracle.com/oraclecorp.com
zones. Looks like someone has reconfigured the nameservers for
dynect.net and then immediately pulled the A/AAAA records for the old
names without waiting out the TTL on the old NS records.

Unbound gives up and returns SERVFAIL for anything using dynect.net
because it exceeds the maximum number of NXDOMAIN responses for
nameserver hostnames.

-- 
Simon Arlott