IIS URL 重写：根站点仍需要身份验证

问：

在 IIS 10 上，我在 https://sub.example.com 有一个网站，该网站的根目录上运行一个 .NET 应用，需要身份验证。

我想 https://sub.example.com/MyDir 重写 http://internalserver/MyDir。但是在IIS重写方面没有成功。

我安装了 ARR 和 Rewrite 模块 - 我已经重新安装了重写模块。

以下是 sub.example.com 网站上的重写规则：

内部服务器不需要对“MyDir”进行任何身份验证，但问题是根站点仍在强制进行身份验证。 如何防止根站点要求身份验证？

我试图遵循这篇文章，但没有成功：允许对 web.config 中的单个文件夹进行匿名身份验证？

编辑：匿名身份验证已打开，以下是 web.config 中与授权相关的部分

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <px.core>
    <formsAuth loginUrl="Frames/Login.aspx" timeout="120" />
    <multiAuth>
      <locations>
        <clear />
      </locations>
    </multiAuth>
  </px.core>
  
  <location inheritInChildApplications="false">
    <system.web>
      <authentication mode="None" />
      <authorization>
        <!--<allow roles="Administrator"/>-->
        <deny users="?" />
      </authorization>
    </system.web>
  </location>

  <location path="Images">
    <system.web>
      <authorization>
        <deny users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="App_Themes/GetCSS.aspx">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="App_Themes/Default">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="App_Themes/Default/Images">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="Api">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="odata">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="odatav4">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="Soap">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="Export">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="Files">
    <system.web>
      <authorization>
        <allow users="?" />
      </authorization>
    </system.web>
  </location>
  <location path="Frames/Outlook">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Frames/PasswordRemind.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Frames/LoginRemind.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Frames/Error.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Frames/Maintenance.aspx">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Frames/PaymentConnector.html">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="calendarSync.ics">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="Handlers">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="favicon.ico">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="EULA">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="robots.txt">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
  <location path="CurrentWorkOrder">
    <system.web>
      <authorization>
        <allow users="*" />
      </authorization>
    </system.web>
  </location>
</configuration>