Allow only temporary zone updates without making them permanent

[Lefteris Tsintjelis]

Hi,

Is it possible to apply temporary only update policy and never save or
modify anything to a zone file?

For example:

zone "example.com" {
 type master;
 auto-dnssec maintain;
 inline-signing yes;
 update-policy {
  grant rndc-key temponly _acme-challenge.example.com. txt;
 };
 file "/etc/namedb/master/db.example.com";
};

Thank you,

Lefteris