## page was renamed from watchA/cloudflare/乗取/mixed_response
= watchA/cloudflare/乗取/mixed_response =
<<TableOfContents()>>

== 疑わしい返答 ==
正常に委譲されたドメインであれば、2つのNSが同じ返答をする。(しかも、委譲NSに一致する。)

しかし、怪しいものがある。
  2つのNSのうちの一方しか返事をしない。返事のNSセットは登録NSとは不一致。(別の特定NS)
   返事をするNSをふたつ返してくる。

  cloudflareの不良というよりは、[[/elliot]]/mollyを割当られたひとが乗取を狙ったというのがありそう。
-- ToshinoriMaeno <<DateTime(2019-11-11T12:56:28+0900)>>


brianscottracing.com
   brianscottracing.com.	300	IN	A	37.1.202.109

MXなし。

== 例 ==
{{{
%dig -t ns brianscottracing.com @a.gtld-servers.net                     ~/dnsq/cf11

; <<>> DiG 9.12.1 <<>> -t ns brianscottracing.com @a.gtld-servers.net
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29514
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 5
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;brianscottracing.com.		IN	NS

;; AUTHORITY SECTION:
brianscottracing.com.	172800	IN	NS	elliot.ns.cloudflare.com.
brianscottracing.com.	172800	IN	NS	lorna.ns.cloudflare.com.

;; ADDITIONAL SECTION:
elliot.ns.cloudflare.com. 172800 IN	A	173.245.59.162
elliot.ns.cloudflare.com. 172800 IN	AAAA	2400:cb00:2049:1::adf5:3ba2
lorna.ns.cloudflare.com. 172800	IN	A	173.245.58.190
lorna.ns.cloudflare.com. 172800	IN	AAAA	2400:cb00:2049:1::adf5:3abe

;; Query time: 54 msec
;; SERVER: 192.5.6.30#53(192.5.6.30)
;; WHEN: Mon Nov 11 12:51:53 JST 2019
;; MSG SIZE  rcvd: 192


}}}

== elliotの返事 ==
{{{
%dig -t ns brianscottracing.com @elliot.ns.cloudflare.com.              ~/dnsq/cf11

; <<>> DiG 9.12.1 <<>> -t ns brianscottracing.com @elliot.ns.cloudflare.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21418
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;brianscottracing.com.		IN	NS

;; ANSWER SECTION:
brianscottracing.com.	86400	IN	NS	elliot.ns.cloudflare.com.
brianscottracing.com.	86400	IN	NS	molly.ns.cloudflare.com.

;; Query time: 7 msec
;; SERVER: 173.245.59.162#53(173.245.59.162)
;; WHEN: Mon Nov 11 12:48:21 JST 2019
;; MSG SIZE  rcvd: 104

12:48f%dig -t ns brianscottracing.com @molly.ns.cloudflare.com.               ~/dnsq/cf11

; <<>> DiG 9.12.1 <<>> -t ns brianscottracing.com @molly.ns.cloudflare.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 40810
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;brianscottracing.com.		IN	NS

;; ANSWER SECTION:
brianscottracing.com.	86400	IN	NS	elliot.ns.cloudflare.com.
brianscottracing.com.	86400	IN	NS	molly.ns.cloudflare.com.

;; Query time: 6 msec
;; SERVER: 173.245.58.205#53(173.245.58.205)
;; WHEN: Mon Nov 11 12:48:30 JST 2019
;; MSG SIZE  rcvd: 104
}}}

== lorna REFUSED ==
{{{
12:48f%dig -t ns brianscottracing.com @lorna.ns.cloudflare.com.               ~/dnsq/cf11

; <<>> DiG 9.12.1 <<>> -t ns brianscottracing.com @lorna.ns.cloudflare.com.
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 30673
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;brianscottracing.com.		IN	NS

;; Query time: 7 msec
;; SERVER: 173.245.58.190#53(173.245.58.190)
;; WHEN: Mon Nov 11 12:48:48 JST 2019
;; MSG SIZE  rcvd: 49

}}}