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ns1/ns2 ともにSERVFAILを返してくる。なにが起きているのか。
 ns1 はたまにREFUSEDを返す。-- ToshinoriMaeno <<DateTime(2022-02-14T11:13:30+0900)>>

{{{
tmaeno@skr:~/jp/sakura/t$ dig -t ns unico-net.co.jp @ns1.dns.ne.jp

; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> -t ns unico-net.co.jp @ns1.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 11651
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;unico-net.co.jp.		IN	NS

;; Query time: 18 msec
;; SERVER: 61.211.236.1#53(61.211.236.1)
;; WHEN: Mon Feb 14 10:56:38 JST 2022
;; MSG SIZE  rcvd: 44

}}}

== history ==
{{{
$ dig -t ns unico-net.co.jp @ns2.dns.ne.jp

; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> -t ns unico-net.co.jp @ns2.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 53862
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;unico-net.co.jp.		IN	NS

;; Query time: 21 msec
;; SERVER: 133.167.21.1#53(133.167.21.1)
;; WHEN: Mon Feb 14 10:56:54 JST 2022
;; MSG SIZE  rcvd: 44
}}}

== REFUSED / ns1 ==
{{{
$ dig -t soa unico-net.co.jp @ns1.dns.ne.jp

; <<>> DiG 9.11.3-1ubuntu1.16-Ubuntu <<>> -t soa unico-net.co.jp @ns1.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 64654
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
; NSID: 66 38 62 30 36 35 39 66 2d 35 39 31 39 2d 34 35 66 36 2d 62 62 62 33 2d 65 65 30 66 34 64 37 39 64 32 32 36 ("f8b0659f-5919-45f6-bbb3-ee0f4d79d226")
;; QUESTION SECTION:
;unico-net.co.jp.		IN	SOA

;; Query time: 18 msec
;; SERVER: 61.211.236.1#53(61.211.236.1)
;; WHEN: Mon Feb 14 11:10:31 JST 2022
;; MSG SIZE  rcvd: 84

}}}
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