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新DNSサーバで切り替え前に逆引きの確認をする。 | itcore 2017年

通常の検索

# dig -x 14.102.134.10

; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7 <<>> -x 14.102.134.10
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 64993
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;10.134.102.14.in-addr.arpa. IN PTR

;; ANSWER SECTION:
10.134.102.14.in-addr.arpa. 3599 IN CNAME 10.0.134.102.14.in-addr.arpa.
10.0.134.102.14.in-addr.arpa. 21599 IN PTR s14010.itcore.jp.

;; Query time: 190 msec
;; SERVER: 8.8.8.8#53(8.8.8.8) ※Google DNS
;; WHEN: 水 12月 13 11:15:57 JST 2017
;; MSG SIZE rcvd: 104

新サーバでの検索

# dig -x 14.102.134.10 @61.213.223.46

; <<>> DiG 9.9.4-RedHat-9.9.4-51.el7 <<>> -x 14.102.134.10 @61.213.223.46
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55983
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 3

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;10.134.102.14.in-addr.arpa. IN PTR

;; ANSWER SECTION:
10.134.102.14.in-addr.arpa. 2711 IN CNAME 10.0.134.102.14.in-addr.arpa.
10.0.134.102.14.in-addr.arpa. 38400 IN PTR s14010.itcore.jp.

;; AUTHORITY SECTION:
0.134.102.14.in-addr.arpa. 38400 IN NS ns3.itcore.jp.
0.134.102.14.in-addr.arpa. 38400 IN NS ns4.itcore.jp.

;; ADDITIONAL SECTION:
ns3.itcore.jp. 38400 IN A 61.213.223.46
ns4.itcore.jp. 38400 IN A 61.213.223.53

;; Query time: 0 msec
;; SERVER: 61.213.223.46#53(61.213.223.46) ※新DNSサーバ
;; WHEN: 水 12月 13 11:16:32 JST 2017
;; MSG SIZE rcvd: 172