[DNS dig로 역방향확인하기_my setting]
====================================
[root@www ~]# dig www.whoishg.com
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> www.whoishg.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28533
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1
;; QUESTION SECTION:
;www.whoishg.com. IN A
;; ANSWER SECTION:
www.whoishg.com. 86400 IN A 118.128.134.103
;; AUTHORITY SECTION:
whoishg.com. 86400 IN NS ns1.whoishg.com.
;; ADDITIONAL SECTION:
ns1.whoishg.com. 86400 IN A 118.128.134.115
;; Query time: 0 msec
;; SERVER: 118.128.134.115#53(118.128.134.115)
;; WHEN: Mon Apr 1 20:07:05 2013
;; MSG SIZE rcvd: 83
[root@www ~]# dig -x 118.128.134.103
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.6 <<>> -x 118.128.134.103
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 35432
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;103.134.128.118.in-addr.arpa. IN PTR
;; AUTHORITY SECTION:
128.118.in-addr.arpa. 9364 IN SOA g.dns.kr. inverse.nic.or.kr. 2013011601 21600 900 604800 43200
;; Query time: 0 msec
;; SERVER: 118.128.134.115#53(118.128.134.115)
;; WHEN: Mon Apr 1 20:09:00 2013
;; MSG SIZE rcvd: 105
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