watchNS/ymc.ne.jpについて、ここに記述してください。
- GMO らしい。
%dnsq ns ymc.ne.jp a.dns.jp
2 ymc.ne.jp: 130 bytes, 1+0+3+3 records, response, noerror query: 2 ymc.ne.jp authority: ymc.ne.jp 86400 NS ns1.ymc.ne.jp authority: ymc.ne.jp 86400 NS dns2.ymc.ne.jp authority: ymc.ne.jp 86400 NS ns2.ymc.ne.jp additional: ns1.ymc.ne.jp 86400 A 61.196.147.50 additional: ns2.ymc.ne.jp 86400 A 114.179.215.247 additional: dns2.ymc.ne.jp 86400 A 121.119.195.249
%dig -t ns ymc.ne.jp @dns2.ymc.ne.jp
; <<>> DiG 9.9.0 <<>> -t ns ymc.ne.jp @dns2.ymc.ne.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43305 ;; flags: qr aa rd; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 4 ;; WARNING: recursion requested but not available ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;ymc.ne.jp. IN NS ;; ANSWER SECTION: ymc.ne.jp. 86400 IN NS ns2.ymc.ne.jp. ymc.ne.jp. 86400 IN NS dns2.ymc.ne.jp. ymc.ne.jp. 86400 IN NS ns1.ymc.ne.jp. ;; ADDITIONAL SECTION: ns1.ymc.ne.jp. 300 IN A 61.196.147.50 ns2.ymc.ne.jp. 300 IN A 114.179.215.247 dns2.ymc.ne.jp. 600 IN A 121.119.195.249 ;; Query time: 10 msec ;; SERVER: 121.119.195.249#53(121.119.195.249) ;; WHEN: Wed May 27 09:03:35 2015 ;; MSG SIZE rcvd: 141
短すぎるTTL
1. おまけ
%dig -t ns ymc.ne.jp @dns1.ymc.ne.jp
; <<>> DiG 9.9.0 <<>> -t ns ymc.ne.jp @dns1.ymc.ne.jp ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11563 ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 2 ;; OPT PSEUDOSECTION: ; EDNS: version: 0, flags:; udp: 4096 ;; QUESTION SECTION: ;ymc.ne.jp. IN NS ;; ANSWER SECTION: ymc.ne.jp. 29057 IN NS dns2.ymc.ne.jp. ymc.ne.jp. 29057 IN NS ns1.ymc.ne.jp. ymc.ne.jp. 29057 IN NS ns2.ymc.ne.jp. ;; ADDITIONAL SECTION: dns2.ymc.ne.jp. 378 IN A 121.119.195.249 ;; Query time: 15 msec ;; SERVER: 114.179.216.253#53(114.179.216.253) ;; WHEN: Wed May 27 09:01:03 2015 ;; MSG SIZE rcvd: 109