nv-kc541.ocn.ad.jp (221.184.25.242) に 5分毎に www.ghost2.qmail.jp の A を問い合わせている状態で、NS のリフレッシュを観測しました。-- tss 2012-02-27 07:09:52
BINDかどうか分かりますか。BINDだったら分からなくもない動作(不良）です。-- ToshinoriMaeno 2012-02-27 15:42:03
昔聞いた情報や fpdns の情報から、Nominum CNS ではないかと思います。-- tss 2012-02-28 01:29:46
~% dig @221.184.25.242 a www.ghost2.qmail.jp ; <<>> DiG 9.8.1-P1 <<>> @221.184.25.242 a www.ghost2.qmail.jp ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43723 ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;www.ghost2.qmail.jp. IN A ;; ANSWER SECTION: www.ghost2.qmail.jp. 300 IN A 202.41.218.242 ;; Query time: 48 msec ;; SERVER: 221.184.25.242#53(221.184.25.242) ;; WHEN: Mon Feb 27 15:55:45 2012 ;; MSG SIZE rcvd: 53 ~% dig @221.184.25.242 ns ghost2.qmail.jp ; <<>> DiG 9.8.1-P1 <<>> @221.184.25.242 ns ghost2.qmail.jp ; (1 server found) ;; global options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 53739 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0 ;; QUESTION SECTION: ;ghost2.qmail.jp. IN NS ;; ANSWER SECTION: ghost2.qmail.jp. 7200 IN NS ns.ghost2.qmail.jp. ghost2.qmail.jp. 7200 IN NS a.ns.ghost2.qmail.jp. ;; Query time: 46 msec ;; SERVER: 221.184.25.242#53(221.184.25.242) ;; WHEN: Mon Feb 27 15:55:53 2012 ;; MSG SIZE rcvd: 66 ~% dnsq ns ghost2.qmail.jp a.ns.qmail.jp 2 ghost2.qmail.jp: 87 bytes, 1+0+1+0 records, response, authoritative, nxdomain query: 2 ghost2.qmail.jp authority: qmail.jp 86400 SOA a.ns.qmail.jp hostmaster.m.qmail.jp 1330324200 16384 2048 1048576 86400
うーん、消えてしまいました。NSのキャッシュは残っているのに。グルーは別扱いなのか... -- tss 2012-02-27 07:47:05
~% dig @221.184.25.242 a www.ghost2.qmail.jp
; <<>> DiG 9.8.1-P1 <<>> @221.184.25.242 a www.ghost2.qmail.jp
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 50250
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;www.ghost2.qmail.jp. IN A
;; AUTHORITY SECTION:
qmail.jp. 10010 IN SOA a.ns.qmail.jp. hostmaster.m.qmail.jp. (
1330324169 ; serial
16384 ; refresh (4 hours 33 minutes 4 seconds)
2048 ; retry (34 minutes 8 seconds)
1048576 ; expire (1 week 5 days 3 hours 16 minutes 16 seconds)
86400 ; minimum (1 day)
)
;; Query time: 42 msec
;; SERVER: 221.184.25.242#53(221.184.25.242)
;; WHEN: Mon Feb 27 16:33:07 2012
;; MSG SIZE rcvd: 91
~% dig @221.184.25.242 ns ghost2.qmail.jp +norec
; <<>> DiG 9.8.1-P1 <<>> @221.184.25.242 ns ghost2.qmail.jp +norec
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48631
;; flags: qr ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;ghost2.qmail.jp. IN NS
;; ANSWER SECTION:
ghost2.qmail.jp. 2749 IN NS a.ns.ghost2.qmail.jp.
ghost2.qmail.jp. 2749 IN NS ns.ghost2.qmail.jp.
;; Query time: 39 msec
;; SERVER: 221.184.25.242#53(221.184.25.242)
;; WHEN: Mon Feb 27 16:33:11 2012
;; MSG SIZE rcvd: 66
~% dig @221.184.25.242 ns ghost2.qmail.jp +norec
; <<>> DiG 9.8.1-P1 <<>> @221.184.25.242 ns ghost2.qmail.jp +norec
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28583
;; flags: qr ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; QUESTION SECTION:
;ghost2.qmail.jp. IN NS
;; ANSWER SECTION:
ghost2.qmail.jp. 2690 IN NS a.ns.ghost2.qmail.jp.
ghost2.qmail.jp. 2690 IN NS ns.ghost2.qmail.jp.
;; ADDITIONAL SECTION:
a.ns.ghost2.qmail.jp. 4438 IN A 131.112.32.2
;; Query time: 41 msec
;; SERVER: 221.184.25.242#53(221.184.25.242)
;; WHEN: Mon Feb 27 16:34:08 2012
;; MSG SIZE rcvd: 82
~% dnsq a www.ghost2.qmail.jp 131.112.32.2
1 www.ghost2.qmail.jp:
120 bytes, 1+1+2+2 records, response, authoritative, noerror
query: 1 www.ghost2.qmail.jp
answer: www.ghost2.qmail.jp 300 A 59.106.175.222
authority: ghost2.qmail.jp 7200 NS c.ns.ghost2.qmail.jp
authority: ghost2.qmail.jp 7200 NS d.ns.ghost2.qmail.jp
additional: c.ns.ghost2.qmail.jp 7200 A 131.112.32.2
additional: d.ns.ghost2.qmail.jp 7200 A 202.41.218.242
~% dig @221.184.25.242 a a.ns.ghost2.qmail.jp. +norec
; <<>> DiG 9.8.1-P1 <<>> @221.184.25.242 a a.ns.ghost2.qmail.jp. +norec
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 3586
;; flags: qr ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;a.ns.ghost2.qmail.jp. IN A
;; ANSWER SECTION:
a.ns.ghost2.qmail.jp. 4332 IN A 131.112.32.2
;; Query time: 38 msec
;; SERVER: 221.184.25.242#53(221.184.25.242)
;; WHEN: Mon Feb 27 16:34:49 2012
;; MSG SIZE rcvd: 54
~% dig @221.184.25.242 a ns.ghost2.qmail.jp. +norec
; <<>> DiG 9.8.1-P1 <<>> @221.184.25.242 a ns.ghost2.qmail.jp. +norec
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2324
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 3
;; QUESTION SECTION:
;ns.ghost2.qmail.jp. IN A
;; AUTHORITY SECTION:
qmail.jp. 81574 IN NS a.ns.qmail.jp.
qmail.jp. 81574 IN NS uz50wd25kf86t43n1m5lz19wxxl87kz231m97qrhdquzs7m1498mvz.qmail.jp.
;; ADDITIONAL SECTION:
a.ns.qmail.jp. 81574 IN A 202.41.218.243
a.ns.qmail.jp. 81574 IN A 218.44.237.137
uz50wd25kf86t43n1m5lz19wxxl87kz231m97qrhdquzs7m1498mvz.qmail.jp. 81574 IN A 59.106.175.222
;; Query time: 40 msec
;; SERVER: 221.184.25.242#53(221.184.25.242)
;; WHEN: Mon Feb 27 16:35:06 2012
;; MSG SIZE rcvd: 172