For those that don't know, every IP address can have a "hostname" associated with it (in a record known as a PTR). This is vital for services like email which check if a hostname exists as part of anti-spam. We had been having major issues for the last couple of years with Gmail who are IPv6 enabled and were checking our email server's PTR record just to find it didn't exist. This is now working.
Sending request to "a.ip6-servers.arpa" (199.212.0.73)
Received referral response - DNS servers for "0.4.2.ip6.arpa":
-> ns1.apnic.net (no IP address)
-> sec1.authdns.ripe.net (no IP address)
-> apnic1.dnsnode.net (no IP address)
-> ns2.lacnic.net (no IP address)
-> tinnie.arin.net (no IP address)
-> ns3.apnic.net (no IP address)
-> ns4.apnic.net (no IP address)
Attempting to resolve DNS server name "sec1.authdns.ripe.net" (details not logged)
Resolved DNS server name "sec1.authdns.ripe.net" to IP address 193.0.9.3
Sending request to "sec1.authdns.ripe.net" (193.0.9.3)
Received referral response - DNS servers for "0.0.8.4.0.0.4.2.ip6.arpa":
-> ns-1422.awsdns-49.org (no IP address)
-> ns-114.awsdns-14.com (no IP address)
-> ns-1829.awsdns-36.co.uk (no IP address)
-> ns-661.awsdns-18.net (no IP address)
Attempting to resolve DNS server name "ns-1422.awsdns-49.org" (details not logged)
Resolved DNS server name "ns-1422.awsdns-49.org" to IP address 205.251.197.142
Sending request to "ns-1422.awsdns-49.org" (205.251.197.142)
Received referral response - DNS servers for "7.1.0.4.0.0.8.4.0.0.4.2.ip6.arpa":
-> ns1.power-business.co.nz (no IP address)
-> ns2.power-business.co.nz (no IP address)
Attempting to resolve DNS server name "ns1.power-business.co.nz" (details not logged)
Resolved DNS server name "ns1.power-business.co.nz" to IP address 60.234.77.213
Sending request to "ns1.power-business.co.nz" (60.234.77.213)
Received authoritative (AA) response:
-> Answer: PTR-record for a.8.4.6.c.9.e.0.0.0.c.c.8.3.1.f.0.0.2.0.7.1.0.4.0.0.8.4.0.0.4.2.ip6.arpa = prometheus.power-business.co.nz
