如要将10isp.com重定向到www.10isp.com，则配置web.config如下：

<?xml version="1.0" encoding="UTF-8"?>

<configuration>

<system.webServer>

<rewrite>

<rules>

<rule name="www" stopProcessing="true">

<match url=".*" />

<conditions>

<add input="{HTTP_HOST}" pattern="^10isp\.com$" />

</conditions>

<action type="Redirect" url="http://www.10isp.com/{R:0}" redirectType="Permanent" />

</rule>

</rules>

</rewrite>

</system.webServer>

</configuration>