1、首先進(jìn)入你的網(wǎng)站主頁，找到【錯誤頁】（注意是IIS下的錯誤頁不是.NET錯誤頁），雙擊【錯誤頁】

2、這樣就進(jìn)入了錯誤頁面，點(diǎn)擊【編輯】或者雙擊狀態(tài)代碼行，打開“編輯自定義錯誤頁面”

3、填寫狀態(tài)碼，響應(yīng)操作處選擇第二項(xiàng)【在此網(wǎng)站上執(zhí)行】，輸入U(xiǎn)RL

4、查看錯誤頁面相對根目錄的位置，按照示例填寫就可以的。然后依次設(shè)置其它頁面

5、當(dāng)然還可以通過修改配置文件（web.config）來設(shè)置自定義頁面，它和上面的配置是對應(yīng)的。

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <httpErrors errorMode="Custom">
            <remove statusCode="502" subStatusCode="-1" />
            <remove statusCode="501" subStatusCode="-1" />
            <remove statusCode="500" subStatusCode="-1" />
            <remove statusCode="412" subStatusCode="-1" />
            <remove statusCode="406" subStatusCode="-1" />
            <remove statusCode="405" subStatusCode="-1" />
            <remove statusCode="403" subStatusCode="-1" />
            <remove statusCode="401" subStatusCode="-1" />
            <remove statusCode="404" subStatusCode="-1" />
            <error statusCode="401" prefixLanguageFilePath="" path="/ErrorPages/401.html" responseMode="ExecuteURL" />
            <error statusCode="404" prefixLanguageFilePath="" path="/ErrorPages/404.html" responseMode="ExecuteURL" />
            <error statusCode="403" prefixLanguageFilePath="" path="/ErrorPages/403.html" responseMode="ExecuteURL" />
            <error statusCode="405" prefixLanguageFilePath="" path="/ErrorPages/405.html" responseMode="ExecuteURL" />
            <error statusCode="406" prefixLanguageFilePath="" path="/ErrorPages/406.html" responseMode="ExecuteURL" />
            <error statusCode="412" prefixLanguageFilePath="" path="/ErrorPages/412.html" responseMode="ExecuteURL" />
            <error statusCode="500" prefixLanguageFilePath="" path="/ErrorPages/500.html" responseMode="ExecuteURL" />
            <error statusCode="501" prefixLanguageFilePath="" path="/ErrorPages/501.html" responseMode="ExecuteURL" />
            <error statusCode="502" prefixLanguageFilePath="" path="/ErrorPages/502.html" responseMode="ExecuteURL" />
            <error statusCode="503" prefixLanguageFilePath="" path="/ErrorPages/503.html" responseMode="ExecuteURL" />
        </httpErrors>
    </system.webServer>
</configuration>

<error  statusCode="404"  prefixLanguageFilePath=""  path="/ErrorPages/404.html" responseMode="ExecuteURL" />

有兩個重要的點(diǎn)：狀態(tài)碼（statusCode）和路徑（path），填寫的時(shí)候要細(xì)心。