Describe DNS/DNSSEC/キャッシュサーバ/jp-ns here.
偽かもしれない JP ドメインの DNS サーバに問い合わせる。
- 203.119.1.1 は a.dns.jp だ(と教えられた）。
$ dig +dnssec jp ns 203.119.1.1
; <<>> DiG 9.7.1-P2 <<>> +dnssec jp ns 203.119.1.1 ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51332 ;; flags: qr rd ra; QUERY: 1, ANSWER: 8, AUTHORITY: 0, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: do; udp: 512 ;; QUESTION SECTION: ;jp. IN NS ;; ANSWER SECTION: jp. 49538 IN NS f.dns.jp. jp. 49538 IN NS c.dns.jp. jp. 49538 IN NS b.dns.jp. jp. 49538 IN NS d.dns.jp. jp. 49538 IN NS g.dns.jp. jp. 49538 IN NS a.dns.jp. jp. 49538 IN NS e.dns.jp. jp. 49538 IN RRSIG NS 8 1 86400 20110328174503 20110226174503 33696 jp. j02UFCMVUKWIVEuYU3YbmfovQYE/WR9dEkCrt3iYBa1aBcsPD7qzd8f8 1bLToEPVlxJoiAF5CDYuRQtdov/DdySyOZ7YXYN9fOYHnzawBWh6UxAZ oOd1tjyeDzKo5l1KXVUVqX3hG7c1lIbVjpg0SVabyIfxtkb7xdwzxJyh mYU= ;; Query time: 65 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Mon Feb 28 14:09:24 2011 ;; MSG SIZE rcvd: 309 ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 34874 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 1 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags: do; udp: 512 ;; QUESTION SECTION: ;203.119.1.1. IN A ;; AUTHORITY SECTION: . 1800 IN SOA a.root-servers.net. nstld.verisign-grs.com. 2011022701 1800 900 604800 86400 . 86400 IN RRSIG SOA 8 0 86400 20110306000000 20110226230000 21639 . eQWDIgYBTzjhQ6llEEr3iioS0Pt5z0EePuuzLCIQeXnO+pj5Vhqeg711 XoT9F9ZBG+sG2gbF6u5xmtcS9MBij7tnXt0A8r7Hf78zxPKsVte3ExqV esjOif1ni/SYSa+KoxRirwdvOakowQaDf4dlYdDxolwzTgAD/Rxu5Ot2 4A4= . 86400 IN NSEC ac. NS SOA RRSIG NSEC DNSKEY . 86400 IN RRSIG NSEC 8 0 86400 20110306000000 20110226230000 21639 . X1K1s+M5Fp4GWaGLfWJtehNmh0WvTlftRIyrwgows5H39L6iFEQCDoRY oPdpArnV2cWGDYAQit9uRv8tfQAp85z1e1bHjZ6gwaU9id+VVEtIugpq T+9dRZGFY4TZWce1Qe2tu6afg5vN51ANbRtzMLwvP/y8z+DTLKIT+hlK afA= ;; Query time: 168 msec ;; SERVER: 8.8.8.8#53(8.8.8.8) ;; WHEN: Mon Feb 28 14:09:24 2011 ;; MSG SIZE rcvd: 455