能上QQ，不能浏览网页，玩网游
请检查DNS是否有问题，能否正常解析。
如：
Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.
C:\WINDOWS>cd\
C:\>nslookup
*** Can't find server name for address 218.30.19.40: Non-existent domain
*** Can't find server name for address 61.134.1.4: Non-existent domain
*** Default servers are not available
Default Server: UnKnown
Address: 218.30.19.40
> www.google.cn
Server: UnKnown
Address: 218.30.19.40
Non-authoritative answer:
Name: www.google.cn.stuff.norvel.com.cn
Address: 115.28.13.102
> exit
C:\>
