## page was renamed from watchNS/sakura/euro.jp
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= さくらNSの返事がおかしい =

== sakura/euro.jp ==

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さくらNSの返事がおかしい。そのことがよく分かるドメインを発見した。

 ns1はほとんどの場合SERVFAILとなる。たまに、REFUSEDを返す。-- ToshinoriMaeno <<DateTime(2022-02-14T11:50:13+0900)>>

{{{
$ dig dns111.euro.jp @a.dns.jp

; <<>> DiG 9.16.1-Ubuntu <<>> dns111.euro.jp @a.dns.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47004
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 3, ADDITIONAL: 4
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1232
; NSID: 61 32 32 2e 74 79 6f ("a22.tyo")
; COOKIE: 964066d92aa79e27d994dc1462066c2191ec5b046bdaea98 (good)
;; QUESTION SECTION:
;dns111.euro.jp.			IN	A

;; AUTHORITY SECTION:
euro.jp.		86400	IN	NS	dns111.euro.jp.
euro.jp.		86400	IN	NS	ns2.dns.ne.jp.
euro.jp.		86400	IN	NS	ns1.dns.ne.jp.

;; ADDITIONAL SECTION:
dns111.euro.jp.		86400	IN	A	27.134.252.194
ns2.dns.ne.jp.		86400	IN	A	133.167.21.1
ns1.dns.ne.jp.		86400	IN	A	61.211.236.1

;; Query time: 12 msec
;; SERVER: 203.119.1.1#53(203.119.1.1)
;; WHEN: 金  2月 11 23:01:05 JST 2022
;; MSG SIZE  rcvd: 189


}}}

== ns1 ==
SERVFAIL/REFUSEDが返る。
{{{
$ dig dns111.euro.jp @ns1.dns.ne.jp

; <<>> DiG 9.16.1-Ubuntu <<>> dns111.euro.jp @ns1.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 51572
;; 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:
;dns111.euro.jp.			IN	A

;; Query time: 16 msec
;; SERVER: 61.211.236.1#53(61.211.236.1)
;; WHEN: 金  2月 11 21:39:59 JST 2022
;; MSG SIZE  rcvd: 83

}}}


複数のバックエンドがあるが、このNSIDを返答するものがREFUSEDを返す。

{{{
$ dig -t ns dns111.euro.jp @ns1.dns.ne.jp

; <<>> DiG 9.16.1-Ubuntu <<>> -t ns dns111.euro.jp @ns1.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 39093
;; 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:
;dns111.euro.jp.			IN	NS

;; Query time: 16 msec
;; SERVER: 61.211.236.1#53(61.211.236.1)
;; WHEN: 金  2月 11 21:43:58 JST 2022
;; MSG SIZE  rcvd: 83
}}}


== ns2 ==
こっちはもっともらしい返事だ。(a.dns.jpからの返事と整合している。)

{{{
$ dig dns111.euro.jp @ns2.dns.ne.jp

; <<>> DiG 9.16.1-Ubuntu <<>> dns111.euro.jp @ns2.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 38025
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;dns111.euro.jp.			IN	A

;; ANSWER SECTION:
dns111.euro.jp.		3600	IN	A	27.134.252.194

;; AUTHORITY SECTION:
euro.jp.		3600	IN	NS	ns2.dns.ne.jp.
euro.jp.		3600	IN	NS	dns111.euro.jp.
euro.jp.		3600	IN	NS	ns1.dns.ne.jp.

;; Query time: 24 msec
;; SERVER: 133.167.21.1#53(133.167.21.1)
;; WHEN: 金  2月 11 21:42:27 JST 2022
;; MSG SIZE  rcvd: 116

}}}
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