Reverse lookups not working when Internet connection failed.

[Fred Morris]

Not enough information is provided about how your PTR zone is configured 
to allow anyone to provide a definitive answer. (Is this nonroutable 
space? Where are the machines located? Are they talking directly to the 
auth servers or are there recursives in the resolution path?)

On Fri, 4 Nov 2022, David Carvalho via bind-users wrote:
> Reverse (PTR) Dns queries about my.domain from my.domain didn't work. Now
> that the internet connection is restored, everything is ok.

Overall I'm unsurprised.

You can put PTR records in a Response Policy Zone as a mitigation or for 
more advanced purposes.

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Fred Morris, internet plumber