使用 X-Frame-Options 有三个可选的值：

​​DENY​​​：浏览器拒绝当前页面加载任何Frame页面
​​​SAMEORIGIN​​​：frame页面的地址只能为同源域名下的页面
​​​ALLOW-FROM​​：origin为允许frame加载的页面地址

<?xml version="1.0" encoding="UTF-8"?>
<configuration>
    <system.webServer>
        <httpProtocol>
            <customHeaders>
                <add name="X-Frame-Options" value="ALLOW-FROM" />
            </customHeaders>
        </httpProtocol>
    </system.webServer>
</configuration>

<?xml version="1.0" encoding="UTF-8"?><configuration><system.webServer><httpProtocol><customHeaders><add name="X-Frame-Options" value="DENY"</customHeaders></httpProtocol></system.webServer></configuration>