daniel,

> The IDN transformation doesn't apply to AXFR nor to zone file flush,
> the domain names are always encoded in Punycode (xn--). 
> You only must ensure that the input zone file doesn't contain Unicode
> characters.

RFC 2181 ยง11 on Name Syntax

   Implementations of the DNS protocols must not place any restrictions
   on the labels that can be used.  In particular, DNS servers must not
   refuse to serve a zone because it contains labels that might not be
   acceptable to some DNS client programs.  A DNS server may be
   configurable to issue warnings when loading, or even to refuse to
   load, a primary zone containing labels that might be considered
   questionable, however this should not happen by default.

anaand tested and says that

> BIND and NSD are correct here: they just load the zone (BIND needs to
> be configured to do so, but it provides the option).

> If you still have any issues with the zone, please send me the source
> zone file for investigation.

attached

randy

Attachment: dead.beef
Description: Binary data

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