Weird behaviour in wildcard CNAME - is this feature or bug? Can it be changed?

[Tony Finch]

Petr Bena <petr at bena.rocks> wrote:
>
> Why is this? Is that normal or a bug?

It's because wildcards in the DNS are crazy and totally abnormal, but
sadly ossified tradition means it cannot be considered a bug. (It's also
intimately tied up with the subtle semantics of NXDOMAIN, and rigidly
enforced by DNSSEC.) It's annoying because it makes wildcards a lot less
useful than one might hope.

https://tools.ietf.org/html/rfc4592 - The Role of Wildcards in the Domain Name System.
https://tools.ietf.org/html/rfc8020 - NXDOMAIN: There Really Is Nothing Underneath.

Tony.
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