-bash-4.1# dig
www.facebook.com @
8.8.8.8
; <<>> DiG 9.7.3-P3-RedHat-9.7.3-8.P3.el6 <<>>
www.facebook.com @
8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9664
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;
www.facebook.com. IN A
;; ANSWER SECTION:
www.facebook.com. 0 IN A 31.13.77.36
;; Query time: 4 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Apr 7 16:54:44 2017
;; MSG SIZE rcvd: 50
-bash-4.1# dig
www.twitter.com @
8.8.8.8
; <<>> DiG 9.7.3-P3-RedHat-9.7.3-8.P3.el6 <<>>
www.twitter.com @
8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 59414
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;
www.twitter.com. IN A
;; ANSWER SECTION:
www.twitter.com. 47 IN CNAME
twitter.com.
twitter.com. 1247 IN A 104.244.42.129
twitter.com. 1247 IN A 104.244.42.1
twitter.com. 196 IN A 104.244.42.65
twitter.com. 859 IN A 104.244.42.193
;; Query time: 288 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Fri Apr 7 16:55:02 2017
;; MSG SIZE rcvd: 111
看解析的结果, 不像是被劫持啊