Issue with the <authorization> node in the Web.config file

Whenever I include <authorization>, the page is displayed without the CSS. Does anyone have any thoughts on why this might be happening?

Below is my web.config:

<?xml version="1.0"?>
<configuration>
  <connectionStrings>
    <add name="UomDBConnectionString1"
         connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|\UomDB.mdf;Integrated Security=True;User Instance=True"
         providerName="System.Data.SqlClient" />
  </connectionStrings>
  <system.web>
    <compilation debug="true" targetFramework="4.0">
      <assemblies>
        <add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" />
        <add assembly="System.Web.Extensions.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
        <add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
      </assemblies>
    </compilation>
    <authentication mode="Forms">
      <forms loginUrl="Login.aspx" timeout="2880" />
    </authentication>
    <authorization>
      <deny users="?"/>
    </authorization>
  </system.web>
</configuration>

If I remove it, the page appears with the CSS.

asp.net.netcssweb-configauthorization

Answer №1

It's possible that your css and images folders are located in a restricted area...

In order to resolve this, you will need to grant access to these files by modifying the forms authentication code in your web.config file.

Here is an example of how you can do this:

 <location path="default.aspx">
    <system.web>
      <authorization>
        <allow users="?"/>
      </authorization>
    </system.web>
  </location>

  <location path="Home">
    <system.web>
      <authorization>
        <allow users="?"/>
      </authorization>
    </system.web>
  </location>

  <location path="Styles">
    <system.web>
      <authorization>
        <allow users="?"/>
      </authorization>
    </system.web>
  </location>

  <location path="Scripts">
    <system.web>
      <authorization>
         <allow users="?"/>
      </authorization>
    </system.web>
  </location>

  <location path="images">
    <system.web>
       <authorization>
          <allow users="?"/>
       </authorization>
    </system.web>
  </location>

Source: forum post

Answer №2

Your CSS files are currently protected by authorization settings. If you want to allow unauthenticated users to access your .css files (or any other file/directory), you can modify your web.config file by adding a new location element.

<configuration>
    <location path="App_Themes/Default/YourFile.css">
        <system.web>
            <authorization>
                <allow users="*"/>
            </authorization>
        </system.web>
    </location>
</configuration>

Answer №3

It is important to verify that your CSS is not located in a separate secure directory.

Answer №4

These symptoms were plaguing me, but after some investigation I found that the root cause was setting a single mimetype:

<system.webServer>
   <staticContent>
      <mimeMap fileExtension=".pdf" mimeType="application/pdf" />
...
</staticContent>

It appeared that due to how my machine was configured, specifying this mimetype was preventing the rendering of any image or CSS files.

I suspect there is a default configuration in place that gets overridden when explicitly specifying a mimetype. Removing that specification resolved the issue for me.

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