RE: This DNS over HTTP thing

[Kevin McCormick <kmccormick () mdtc net>]

The simple fix is to add a new DNS record.

Call it ULS, Use Local Server or something else relevant.

The record would contain the CIDR network addresses of clients that need to use the internal DNS servers.

If the DNS request comes from an IP in matching a CIDR network address in the ULS record, then the server would respond 
with an error message telling the application to use the configured local DNS server.

Thoughts?

Thank you,

Kevin McCormick

-----Original Message-----
From: NANOG <nanog-bounces () nanog org> On Behalf Of Brandon Martin
Sent: Monday, September 30, 2019 10:57 PM
To: nanog () nanog org
Subject: Re: This DNS over HTTP thing

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