## page was renamed from DNS/毒盛/移転インジェクション/確認方法/bind/NS
DNS/毒盛/移転インジェクション/確認方法/bind/NSについて、ここに記述してください。

flip.e-ontap.com TTL満了を待って、NSを問い合わせしなおした。
　以下の返答が権威ある返答であることは推測可能とかんがえる。
    そして、Authでは上書きされないと考えた。-- ToshinoriMaeno <<DateTime(2018-04-07T17:36:14+0900)>>

{{{

$ dig -t ns flip.e-ontap.com

; <<>> DiG 9.12.0 <<>> -t ns flip.e-ontap.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44379
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;flip.e-ontap.com.		IN	NS

;; ANSWER SECTION:
flip.e-ontap.com.	3600	IN	NS	ns.flip.internot.jp.

;; Query time: 295 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 07 17:26:07 JST 2018
;; MSG SIZE  rcvd: 78
}}}

確認：
{{{
$ dig -t ns flip.e-ontap.com

; <<>> DiG 9.12.0 <<>> -t ns flip.e-ontap.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44379
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;flip.e-ontap.com.		IN	NS

;; ANSWER SECTION:
flip.e-ontap.com.	3600	IN	NS	ns.flip.internot.jp.

;; Query time: 295 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 07 17:26:07 JST 2018
;; MSG SIZE  rcvd: 78
}}}

== 毒盛試験 ==
権威あるNSレコードの上書きはされない。

{{{
$ dig -t a xxxx.flip.e-ontap.com 

; <<>> DiG 9.12.0 <<>> -t a xxxx.flip.e-ontap.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18912
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;xxxx.flip.e-ontap.com.		IN	A

;; ANSWER SECTION:
xxxx.flip.e-ontap.com.	60	IN	A	150.42.6.5

;; Query time: 545 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 07 17:31:24 JST 2018
;; MSG SIZE  rcvd: 66

}}}

$ dig -t a xxxx.flip.e-ontap.com 

; <<>> DiG 9.12.0 <<>> -t a xxxx.flip.e-ontap.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18912
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;xxxx.flip.e-ontap.com.		IN	A

;; ANSWER SECTION:
xxxx.flip.e-ontap.com.	60	IN	A	150.42.6.5

;; Query time: 545 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 07 17:31:24 JST 2018
;; MSG SIZE  rcvd: 66
}}}


{{{
$ dig -t a x1.flip.e-ontap.com 

; <<>> DiG 9.12.0 <<>> -t a x1.flip.e-ontap.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 36829
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;x1.flip.e-ontap.com.		IN	A

;; ANSWER SECTION:
x1.flip.e-ontap.com.	60	IN	A	150.42.6.5

;; Query time: 12 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 07 17:32:54 JST 2018
;; MSG SIZE  rcvd: 64
}}}

{{{
$ dig -t ns flip.e-ontap.com 

; <<>> DiG 9.12.0 <<>> -t ns flip.e-ontap.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 214
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;flip.e-ontap.com.		IN	NS

;; ANSWER SECTION:
flip.e-ontap.com.	3082	IN	NS	ns.flip.internot.jp.

;; Query time: 0 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Sat Apr 07 17:34:45 JST 2018
;; MSG SIZE  rcvd: 78
}}}