DNS/TCP/JP-domain/kantei.go.jpについて、ここに記述してください。

Unbound でTCPだけを使うように設定したら、
　www.kantei.go.jp　Aが得られなくなった。TCP接続できないのを忘れていた。(再確認)
　　UDPなら得られる。-- ToshinoriMaeno <<DateTime(2018-04-27T09:22:47+0900)>>


  kantei.go.jp NS も取れない。

== www.kantei.go.jp ==
{{{
$ dig kantei.go.jp @a.dns.jp

; <<>> DiG 9.12.1 <<>> kantei.go.jp @a.dns.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 18824
;; 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:
;kantei.go.jp.			IN	A

;; AUTHORITY SECTION:
kantei.go.jp.		86400	IN	NS	ns8.kantei.go.jp.
kantei.go.jp.		86400	IN	NS	ns7.kantei.go.jp.

;; ADDITIONAL SECTION:
ns7.kantei.go.jp.	86400	IN	A	202.214.194.135
ns8.kantei.go.jp.	86400	IN	A	202.214.216.7
ns7.kantei.go.jp.	86400	IN	AAAA	2001:240:1e00:f21::135
ns8.kantei.go.jp.	86400	IN	AAAA	2001:240:1e00:1021::7

;; Query time: 4 msec
;; SERVER: 203.119.1.1#53(203.119.1.1)
;; WHEN: Fri Apr 27 09:13:40 JST 2018
;; MSG SIZE  rcvd: 165

}}}

{{{
$ dig +tcp -t a www.kantei.go.jp @202.214.194.135
;; Connection to 202.214.194.135#53(202.214.194.135) for www.kantei.go.jp failed: timed out.
;; Connection to 202.214.194.135#53(202.214.194.135) for www.kantei.go.jp failed: timed out.

; <<>> DiG 9.12.1 <<>> +tcp -t a www.kantei.go.jp @202.214.194.135
;; global options: +cmd
;; connection timed out; no servers could be reached
;; Connection to 202.214.194.135#53(202.214.194.135) for www.kantei.go.jp failed: timed out.
}}}

{{{
tmaeno@u16:~$ dig +notcp -t a www.kantei.go.jp @202.214.194.135

; <<>> DiG 9.12.1 <<>> +notcp -t a www.kantei.go.jp @202.214.194.135
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 29978
;; flags: qr aa rd ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;www.kantei.go.jp.		IN	A

;; ANSWER SECTION:
www.kantei.go.jp.	30	IN	A	202.214.194.138

;; Query time: 8 msec
;; SERVER: 202.214.194.135#53(202.214.194.135)
;; WHEN: Fri Apr 27 09:27:44 JST 2018
;; MSG SIZE  rcvd: 50


}}}