今天遇到了一个很奇怪的DNS问题同一个域名竟然返回不同的IP(这个域名只对应一个IP),具体的描述如下:

A电脑:

IP:192.168.0.12

子网掩码:255.255.255.0

网关:192.168.0.1

DNS:192.168.1.2

B电脑:

IP:192.168.0.105

子网掩码:255.255.255.0

网关:192.168.0.1

DNS:192.168.1.2

C电脑:

IP:192.168.1.22

子网掩码:255.255.255.0

网关:192.168.1.1

DNS:192.168.1.2

DNS服务器:

IP:192.168.1.2

子网掩码:255.255.255.0

网关:192.168.1.1

DNS:192.168.1.2

 

状况:这几台电脑都可以上网,公司的网站域名为 www.iyouhe.com IP为:202.88.5.45,公司内部一个WEBSever的域名为www.iyouhe.com  IP为:192.168.1.200,测试结果如下:

A:ping www.iyouhe.com  返回IP为:192.168.1.200

B:ping www.iyouhe.com  返回IP为:202.88.5.45

C:ping www.iyouhe.com  返回IP为:202.88.5.45

DNS服务器:ping www.iyouhe.com  返回IP为:202.88.5.45

 

感觉很是奇怪,其他的机器没有问题,为什A电脑有问题?后来有测试了另一台0网段的机器,也是这样返回内部的WEBSERVER的IP,感觉像是DNS的解析出了问题,,上网找了一些文章也没有找到问题所在,无意中看到一个修改HOSTS文件的内容,,突发奇想.

赶紧查看A电脑的hosts文件,目录位置:c:windows/system32/drivers/etc/hosts

如下:

# copyright (c) 1993-1999 microsoft corp.
#
# this is a sample hosts file used by microsoft tcp/ip for windows.
#
# this file contains the mappings of ip addresses to host names. each
# entry should be kept on an individual line. the ip address should
# be placed in the first column followed by the corresponding host name.
# the ip address and the host name should be separated by at least one
# space.
#
# additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# for example:
#
#      102.54.94.97     rhino.acme.com          # source server
#       38.25.63.10     x.acme.com              # x client host

127.0.0.1       localhost
原来如此,添加一段上去

202.88.5.45 www.iyouhe.com

重新测试OK!

所以在内网设置DNS的时候一定要注意哦,相同的域名和不同的IP之间可能出问题了,呵呵!