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查51.com域名信息
[root@SeeLinux ~]# whois 51.com
[Querying whois.internic.net]
[Redirected to whois.paycenter.com.cn]
[Querying whois.paycenter.com.cn]
[whois.paycenter.com.cn]
…
Domain Name:51.com
Registrant:
shengdong network technology development(shanghai) co.,ltd
shanghai
210070
上海
Administrative Contact:
pangshengdong
pangshengdong
shanghai
shanghai shanghai 210070
China
tel: 86 021 58815151
fax: 86 021 58815151
www_86_net@hotmail.com
Technical Contact:
pangshengdong
pangshengdong
shanghai
shanghai shanghai 210070
China
tel: 86 021 58815151
fax: 86 021 58815151
www_86_net@hotmail.com
Billing Contact:
pangshengdong
pangshengdong
shanghai
shanghai shanghai 210070
China
tel: 86 021 58815151
fax: 86 021 58815151
www_86_net@hotmail.com
Registration Date: 1998-07-10
Update Date: 2005-08-09
Expiration Date: 2012-07-09
Primary DNS: ns1.whocool.com 61.129.254.180
Secondary DNS: NS2.WHOCOOL.COM 211.157.108.111
所属域名注册商:http://www.paycenter.com.cn/
一、 首先分析www.51.com域名
电信网络
[root@SeeLinux ~]# dig www.51.com
; <<>> DiG 9.2.4 <<>> www.51.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 55403
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2
;; QUESTION SECTION:
;www.51.com. IN A
;; ANSWER SECTION:
www.51.com. 19750 IN A 60.190.31.51
;; AUTHORITY SECTION:
51.com. 19750 IN NS ns1.51.com.
51.com. 19750 IN NS ns2.51.com.
;; ADDITIONAL SECTION:
ns1.51.com. 19750 IN A 61.129.254.180
ns2.51.com. 19750 IN A 211.157.108.111
;; Query time: 3 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Wed Aug 2 14:28:41 2006
;; MSG SIZE rcvd: 112
1、从以上信息看出目前www.51.com指向一个IP地址:60.190.31.51,服务器位于浙江省宁波市电信机房
2、DNS服务器:
ns1.51.com. 19750 IN A 61.129.254.180 上海市 电信
ns2.51.com. 19750 IN A 211.157.108.111 北京市 中华通信
从之前的DNS来看:
Primary DNS: ns1.whocool.com 61.129.254.180
Secondary DNS: NS2.WHOCOOL.COM 211.157.108.111
可以从此判断此域名的域名记录是可能由另一家公司的DNS服务器代管。
电信网络 nslookup查询
主DNS:202.96.128.86
通过202.96.128.86作如下查询
[root@SeeLinux ~]# nslookup
> server 202.96.128.86
Default server: 202.96.128.86
Address: 202.96.128.86#53
> www.51.com
Server: 202.96.128.86
Address: 202.96.128.86#53
Non-authoritative answer:
Name: www.51.com
Address: 60.190.31.51
> bbs.51.com
Server: 202.96.128.86
Address: 202.96.128.86#53
Non-authoritative answer:
bbs.51.com canonical name = bbspool.51.com.
Name: bbspool.51.com
Address: 60.190.31.90
Name: bbspool.51.com
Address: 60.190.28.123
Name: bbspool.51.com
Address: 60.190.28.126
Name: bbspool.51.com
Address: 60.190.31.52
> abc.51.com
Server: 202.96.128.86
Address: 202.96.128.86#53
Non-authoritative answer:
Name: abc.51.com
Address: 60.190.31.51
>
网通网络 nslookup查询
主DNS:202.106.0.20
辅DNS:202.106.196.115
通过主DNS: 202.106.0.20作如下查询
[root@SeeLinux ~]# nslookup
> server 202.106.0.20
Default server: 202.106.0.20
Address: 202.106.0.20#53
> www.51.com
Server: 202.106.0.20
Address: 202.106.0.20#53
Non-authoritative answer:
Name: www.51.com
Address: 221.12.41.197
> bbs.51.com
Server: 202.106.0.20
Address: 202.106.0.20#53
Non-authoritative answer:
Name: bbs.51.com
Address: 221.12.41.198
> abc.51.com
Server: 202.106.0.20
Address: 202.106.0.20#53
Non-authoritative answer:
Name: abc.51.com
Address: 60.190.31.51
> sdfsdf.51.com 泛域名检查
Server: 202.106.0.20
Address: 202.106.0.20#53
Non-authoritative answer:
Name: sdfsdf.51.com
Address: 60.190.31.51
> *.51.com 泛域名检查
Server: 202.106.0.20
Address: 202.106.0.20#53
Non-authoritative answer:
Name: *.51.com
Address: 60.190.31.51
二、 分析bbs.51.com域名
电信
;; ANSWER SECTION:
bbs.51.com. 11978 IN CNAME bbspool.51.com.
bbspool.51.com. 11978 IN A 60.190.31.90
bbspool.51.com. 11978 IN A 60.190.28.123
bbspool.51.com. 11978 IN A 60.190.28.126
bbspool.51.com. 11978 IN A 60.190.31.52
电信网络把bbs.51.com指向四个IP
网通bbs.51.com域名只对应一个IP:221.12.41.198
三、 分析abc.51.com
abc.51.com电信、网通同时指向同一个IP:60.190.31.51 |
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