Authoritative Resources for Public DNS Pinging

Wed Feb 9 13:00:39 UTC 2022

Mike Hammett wrote:

> Yes, pinging public DNS servers is bad.

Wrong. It is not bad, at least not so bad, pinging properly
anycast DNS servers.

The point of anycast is resistance to DDoS.

But, relying on hard coded 8.8.8.8 is not a good idea because
DNS service of the address may be terminated.

Instead, properly anycast root name servers are authoritative
resources provided for public DNS queries which can be used for
pinging, though pinging so with ICMP should be less painful
for the servers.

						Masataka Ohta