google dns 不能解析 www.caijing.com.cn

[liuyug]

以前一直以为 google dns 8.8.8.8 8.8.4.4 是稳定的万能的，但今天发现一个问题，他不能解析 www.caijing.com.cn，不知道为什么？

添加 opendns 的服务器后，恢复正常。

[taohunter]

在本机dns server设定为google dns的状态下运行一下traceroute，卡在哪里一看便知。。。

[liuyug]

traceroute ??

不能解析 www.caijing.com.cn，能解析 ubuntu.org.cn ...

[poloshiao]

1. dig www.caijing.com.cn

; <<>> DiG 9.9.5-3-Ubuntu <<>> www.caijing.com.cn
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28477
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;www.caijing.com.cn. IN A

;; ANSWER SECTION:
www.caijing.com.cn. 540 IN CNAME www.f5.caijing.com.cn.
www.f5.caijing.com.cn. 5 IN A 219.232.238.200

;; Query time: 33 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Tue Jun 03 12:17:47 CST 2014
;; MSG SIZE rcvd: 84

2. ping -c 3 www.caijing.com.cn
PING www.f5.caijing.com.cn (219.232.238.200) 56(84) bytes of data.
64 bytes from 219.232.238.200: icmp_seq=1 ttl=46 time=73.0 ms
64 bytes from 219.232.238.200: icmp_seq=2 ttl=46 time=167 ms
64 bytes from 219.232.238.200: icmp_seq=3 ttl=46 time=173 ms

--- http://www.f5.caijing.com.cn ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 6983ms
rtt min/avg/max/mdev = 73.009/138.263/173.964/46.210 ms

[liuyug]

注意，机器在国外。国内是好的

google dns

代码： 全选

$ dig www.caijing.com.cn

; <<>> DiG 9.8.6-P2 <<>> www.caijing.com.cn
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 25770
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.caijing.com.cn.		IN	A

;; Query time: 2122 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Jun 05 03:25:27 Local time zone must be set--see zic manual page 2014
;; MSG SIZE  rcvd: 36

opendns

代码： 全选

$ dig www.caijing.com.cn

; <<>> DiG 9.8.6-P2 <<>> www.caijing.com.cn
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24334
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.caijing.com.cn.		IN	A

;; ANSWER SECTION:
www.caijing.com.cn.	1632	IN	CNAME	www.f5.caijing.com.cn.
www.f5.caijing.com.cn.	14	IN	A	219.232.238.200

;; Query time: 1 msec
;; SERVER: 208.67.222.222#53(208.67.222.222)
;; WHEN: Thu Jun 05 03:25:43 Local time zone must be set--see zic manual page 2014
;; MSG SIZE  rcvd: 73

代码： 全选

ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_req=1 ttl=49 time=11.2 ms
64 bytes from 8.8.8.8: icmp_req=2 ttl=49 time=11.2 ms
^C
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1001ms
rtt min/avg/max/mdev = 11.284/11.290/11.297/0.106 ms

代码： 全选

dig ubuntu.org.cn

; <<>> DiG 9.8.6-P2 <<>> ubuntu.org.cn
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39594
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;ubuntu.org.cn.			IN	A

;; ANSWER SECTION:
ubuntu.org.cn.		9	IN	A	192.157.249.221
ubuntu.org.cn.		9	IN	A	198.71.84.64
ubuntu.org.cn.		9	IN	A	198.71.86.201
ubuntu.org.cn.		9	IN	A	192.157.242.155

;; Query time: 503 msec
;; SERVER: 8.8.4.4#53(8.8.4.4)
;; WHEN: Thu Jun 05 03:34:20 Local time zone must be set--see zic manual page 2014
;; MSG SIZE  rcvd: 95