watchWWW/

wwwへの委譲

1. japanweb.ne.jp

https://www.japanweb.ne.jp

$ dnsq ns japanweb.ne.jp a.dns.jp
2 japanweb.ne.jp:
104 bytes, 1+0+2+2 records, response, noerror
query: 2 japanweb.ne.jp
authority: japanweb.ne.jp 86400 NS ns1.dns.ne.jp
authority: japanweb.ne.jp 86400 NS ns2.dns.ne.jp
additional: ns1.dns.ne.jp 86400 A 61.211.236.1
additional: ns2.dns.ne.jp 86400 A 133.167.21.1

2. しかし

$ dig -t ns japanweb.ne.jp @ns1.dns.ne.jp

; <<>> DiG 9.11.1-P3 <<>> -t ns japanweb.ne.jp @ns1.dns.ne.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 50899
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;japanweb.ne.jp.                        IN      NS

;; Query time: 6 msec
;; SERVER: 61.211.236.1#53(61.211.236.1)
;; WHEN: Mon Oct 09 09:20:25 JST 2017
;; MSG SIZE  rcvd: 43

3. www.japanweb.ne.jp

japanweb.ne.jp ゾーンは存在しない。

$ dnsq a www.japanweb.ne.jp ns1.dns.ne.jp
1 www.japanweb.ne.jp:
92 bytes, 1+1+2+0 records, response, authoritative, noerror
query: 1 www.japanweb.ne.jp
answer: www.japanweb.ne.jp 3600 A 219.94.163.15
authority: www.japanweb.ne.jp 3600 NS ns1.dns.ne.jp
authority: www.japanweb.ne.jp 3600 NS ns2.dns.ne.jp