<configuration>
  <system.web>
    <authentication mode="Passport">
      <passport redirectUrl="loginpage.aspx" />
    </authentication>
    <authorization>
      <allow users="*" />
   <authorization>
  </system.web>
 <location path="protectedcontent.aspx">
  <system.web>
    <authorization>
     <deny users="?" />
    </authorization>
  </system.web>
 </location>
 </configuration>