Recommendations to others considering CoreDNS:
I recommend it as they have excellent support that strives to keep things as simple as possible and we have reasonable default values. Here is the Corefile for calluses. one of the best services I've tried so far which has been of great help in the departments of my organization. Review collected by and hosted on G2.com.
What problems is CoreDNS solving and how is that benefiting you?
When we write a web address in our browser, it requires a DNS search to associate the name with the real IP address. But the first thing our system does is to check if the answer that the browser is requesting is found in the local cache. If it is, it will automatically send the associated IP to establish the remote connection. Only in the case that this information is not stored, the equipment will connect with a DNS server that it finds in its path to request the ISP service. At this moment, this information stops forming the cache of the system for future accesses.
More information at: https://www.profesionalreview.com/mejores-servidores-dns-publicos-gratuitos/ Review collected by and hosted on G2.com.