DNS/ENT/NXDOMAINについて、ここに記述してください。
$ dig -t txt compute.amazonaws\.com @r1.amazonaws.com
; <<>> DiG 9.16.1-Ubuntu <<>> -t txt compute.amazonaws.com @r1.amazonaws.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 40103
;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1
;; WARNING: recursion requested but not available
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; NSID: 35 37 32 37 38 37 66 32 39 38 32 35 65 32 39 30 36 36 33 66 38 36 35 38 36 33 34 62 38 34 37 39 20 20 2d ("572787f29825e290663f8658634b8479 -")
;; QUESTION SECTION:
;compute.amazonaws.com. IN TXT
;; AUTHORITY SECTION:
amazonaws.com. 3593 IN SOA dns-external-master.amazon.com. hostmaster.amazon.com. 2012708585 180 60 2592000 3593
;; Query time: 112 msec
;; SERVER: 205.251.192.27#53(205.251.192.27)
;; WHEN: 月 10月 04 23:41:43 JST 2021
;; MSG SIZE rcvd: 163