昨天，Google发布了Google DNS服务，提供主副DNS服务器地址：
8.8.8.8
8.8.4.4
非常吉利的数字！
http://googleblog.blogspot.com/2009/12/introducing-google-public-dns.html
为什么你需要Google的DNS呢？国内的DNS提供商（譬如中国电信）可能会篡改某些DNS（譬如，对于本来不存在的域名，自动跳转到114的广告页面上），从而存在安全隐患。
Google的DNS承诺：
1. 更快速的域名定位查找服务
2. 提供更好的安全性
3. 绝无重定向
Google DNS页面：
http://code.google.com/speed/public-dns/
配置DNS页面：
http://code.google.com/speed/public-dns/docs/using.html
DNS settings are specified in the?TCP/IP Properties window for the selected network connection.
Example: Changing DNS server settings on Microsoft Windows Vista
- Go the Control Panel.
- Click Network and Internet, then Network and Sharing Center, then Manage network connections.
- Select the connection for which you want to configure Google Public DNS. For example:
- To change the settings for an Ethernet connection, right-click Local Area Connection, and click Properties.
- To change the settings for a wireless connection, right-click Wireless Network Connection, and click Properties.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
- Select the Networking tab. Under This connection uses the following items, click Internet Protocol Version 4 (TCP/IPv4), and then click Properties.
- Click Advanced and select the DNS tab. If there are any DNS server IP addresses listed there, write them down for future reference, and remove them from this window.
- Click OK.
- Select Use the following DNS server addresses. If there are any IP addresses listed in the Preferred DNS server or Alternate DNS server, write them down for future reference.
- Replace those addresses with the IP addresses of the Google DNS servers:?8.8.8.8 and 8.8.4.4.
- Restart the connection you selected in step 3.
- Test that your setup is working correctly; see Testing your new settings below.
- Repeat the procedure for additional network connections you want to change.
