DNS/TCP/JP-domain/kantei.go.jp

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 2018-04-27 00:22:47 kantei.go.jp NS も取れない。

1. 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