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