Should the nameserver response DNS request with type CAA(257)?
I made some tests these two days, but I found different results, the day before yesterday, I found that if the nameserver do not response CAA requests, it’s OK, I can still get the certificate.
But today I found that if the nameserver do not response CAA requests, I got “timed out” error, and if the nameserver response CAA requests,there’s no error incurred, no matter the nameserver preserve the case or not.
Is the auth method changing?
And does “Server failure at resolver” mean there’s error in nameserver?