[dns-operations] service.gov.scot erroneous NXDOMAIN from "scot" auth servers

[Stephane Bortzmeyer]

On Tue, Jun 20, 2023 at 01:36:10PM +0200,
 CORE DNS Support Team <dnsmaster at corenic.org> wrote 
 a message of 43 lines which said:

> since anycast9 is only responsible for scot and not for gov.scot, I
> believe the desired answer is a delegation to the name servers of
> gov.scot, and not, as you wrote, a "NODATA" response

No, Viktor is right, and a NODATA (the correct answer) is indeed what
the servers return for other query types:


% dig @anycast23.irondns.net. A service.gov.scot

; <<>> DiG 9.18.12-1-Debian <<>> @anycast23.irondns.net. A service.gov.scot
; (2 servers found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30666
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;service.gov.scot.		IN	A

;; AUTHORITY SECTION:
gov.scot.		86400	IN	NS	ns0.ja.net.
gov.scot.		86400	IN	NS	ns4.ja.net.
gov.scot.		86400	IN	NS	ns2.ja.net.
gov.scot.		86400	IN	NS	ns3.ja.net.

;; Query time: 8 msec
;; SERVER: 2a01:5b0:5::b#53(anycast23.irondns.net.) (UDP)
;; WHEN: Tue Jun 20 14:43:54 CEST 2023
;; MSG SIZE  rcvd: 123