过网站根目录创建web.config文件添加301重定向代码即可实现了。下面是免费空间小编给大家整理的具体代码如下web.config：
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="Canonical Host Name" stopProcessing="true">
<match url="(.*)" />
<conditions>
<add input="{HTTP_HOST}" pattern="^56dr\.com$" />
</conditions>
<action type="Redirect" url="http://www.56dr.com/{R:1}" redirectType="Permanent" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>
