IPv4-Mapped IPv6 Address used in DNS with AAAA-records

[Nick Hilliard]

Thomas Schäfer wrote on 28/07/2023 09:04:
> "We did this to drive down the cost with our DNS provider. Queries for
> AAAA records that didn't exist, followed by queries for A records,
> was costing us significantly and we needed to alleviate that."
> 
> "Our AAAA answers follow the standards, and our local dual-stack
> testing has shown no issues."

There's a long tail of ipv6 implementations, and some of them are very 
broken indeed. Thoughts and prayers to their user base.

Nick