The DNS check Knowledge Base contain information about each check, its purpose, expected results and how to deal with any anomalies detected.

Most suggested measures implies that you as a customer run your own DNS servers on-prem or in the cloud and have management access to the servers and its configuration.

For customers running outsourced DNS servers, the measures described are in many regards the same as if you run your own DNS servers with the exception that the measures need to be taken by the service provider.