dig redhat.com
;; QUESTION SECTION:
;redhat.com. IN A
;; ANSWER SECTION:
redhat.com. 3600 IN A 209.132.183.105
我們得到ip地址209.132.183.105
----域名爲redhat.com
的A記錄。
現在我想從ip-- 209.132.183.105
獲取域名。
也許你會介紹兩種方法來獲得它。無法從基於A記錄的IP地址獲取域名?
nslookup 209.132.183.105
Server: 192.168.1.1
Address: 192.168.1.1#53
Non-authoritative answer:
105.183.132.209.in-addr.arpa name = redirect.redhat.com.
Authoritative answers can be found from:
dig -x 209.132.183.105
; <<>> DiG 9.9.5-9+deb8u7-Debian <<>> -x 209.132.183.105
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62599
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1280
;; QUESTION SECTION:
;105.183.132.209.in-addr.arpa. IN PTR
;; ANSWER SECTION:
105.183.132.209.in-addr.arpa. 519 IN PTR redirect.redhat.com.
;; Query time: 1 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Sat Nov 19 15:11:33 CST 2016
;; MSG SIZE rcvd: 90
認爲是不吉利taht結果不是redhat.com
和redirect.redhat.com
是PTR記錄與209.132.183.105
。
我可以得出結論,沒有辦法從IP地址獲得域名的情況下,該IP是域名的記錄?
您的結論是正確的。 (擁有域名的任何人都可以創建A記錄並將其指向任何** IP地址) –