How to disable cache for PTR records

[wolerine]

Hello, I have tried disabling cache settings below for arpa domain.

domain-rules /ip6.arpa/ -no-cache
domain-rules /in-addr.arpa/ -no-cache

Those only disable caching for ip6.arpa and in-addr.arpa

Is there any way to totally disable cache for all arpa request?

Thank you

[PikuZheng]

domain-rules /arpa/ -no-cache if you mean