MoinQ: DNS/1/CNAME/返答例/0am.jp

watchWWW/0am.jpについて、ここに記述してください。

a.ns.qmail.jp から見ると、二段のCNAMEが見える。

%dig www.0am.jp ~

; <<>> DiG 9.9.0 <<>> www.0am.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48377
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.0am.jp.                    IN      A

;; ANSWER SECTION:
www.0am.jp.             300     IN      CNAME   gslb.0am.jp.
gslb.0am.jp.            300     IN      CNAME   jpn.gslb.0am.jp.
jpn.gslb.0am.jp.        300     IN      A       210.197.74.203

;; Query time: 70 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue Jul 26 10:29:50 2016
;; MSG SIZE  rcvd: 81

ところが、nuro経由だとCNAMEは一段

$ dig www.0am.jp

; <<>> DiG 9.9.5-3ubuntu0.8-Ubuntu <<>> www.0am.jp
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50203
;; flags: qr rd ra; QUERY: 1, ANSWER: 6, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1220
;; QUESTION SECTION:
;www.0am.jp.                    IN      A

;; ANSWER SECTION:
www.0am.jp.             70      IN      CNAME   gslb.0am.jp.
gslb.0am.jp.            70      IN      A       168.235.66.47
gslb.0am.jp.            70      IN      A       46.19.34.8
gslb.0am.jp.            70      IN      A       210.197.74.203
gslb.0am.jp.            70      IN      A       168.235.77.133
gslb.0am.jp.            70      IN      A       163.44.153.232

;; Query time: 0 msec
;; SERVER: 127.0.0.2#53(127.0.0.2)
;; WHEN: Tue Jul 26 10:31:08 JST 2016
;; MSG SIZE  rcvd: 138