On 9/30/19 10:25 PM, Jay R. Ashworth wrote:
Is there an official name for it I should be searching for?
Aside from "DoH" (smacks Homer's head), you might find searching for the Mozilla (et. al.) "canary domain" useful.
It's use-application-dns.net. NXDOMAIN it, and Mozilla (at least) will go back to using your local DNS server list as per usual.
-- Brandon Martin