@
zro root@Server:~# dig
www.pcpop.com @
119.29.29.29
; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>>
www.pcpop.com @
119.29.29.29
;; global options: +cmd
;; connection timed out; no servers could be reached
root@Server:~# dig
www.baidu.com @
119.29.29.29
; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>>
www.baidu.com @
119.29.29.29
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4512
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;
www.baidu.com. IN A
;; ANSWER SECTION:
www.baidu.com. 476 IN CNAME
www.a.shifen.com.
www.a.shifen.com. 9 IN A 115.239.211.112
www.a.shifen.com. 9 IN A 115.239.210.27
;; Query time: 25 msec
;; SERVER: 119.29.29.29#53(119.29.29.29)
;; WHEN: Sun Oct 25 01:35:25 CST 2015
;; MSG SIZE rcvd: 90
root@Server:~# dig
www.zol.com.cn @
119.29.29.29
; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>>
www.zol.com.cn @
119.29.29.29
;; global options: +cmd
;; connection timed out; no servers could be reached
root@Server:~# dig
www.163.com @
119.29.29.29
; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>>
www.163.com @
119.29.29.29
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60595
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;
www.163.com. IN A
;; ANSWER SECTION:
www.163.com. 386 IN CNAME
www.163.com.lxdns.com.
www.163.com.lxdns.com. 386 IN CNAME
163.xdwscache.ourglb0.com.
163.xdwscache.ourglb0.com. 27 IN A 218.6.111.176
163.xdwscache.ourglb0.com. 27 IN A 220.162.97.209
163.xdwscache.ourglb0.com. 27 IN A 220.162.97.136
;; Query time: 45 msec
;; SERVER: 119.29.29.29#53(119.29.29.29)
;; WHEN: Sun Oct 25 01:36:02 CST 2015
;; MSG SIZE rcvd: 145
root@Server:~# dig
www.v2ex.com @
119.29.29.29
; <<>> DiG 9.9.5-3ubuntu0.4-Ubuntu <<>>
www.v2ex.com @
119.29.29.29
;; global options: +cmd
;; connection timed out; no servers could be reached
什么情况?