How set anonymous authentication in web.config

Dear Expert,

I hv a simple web site published on IIS, but I do not hv access IIS to modify the authentication mode. what I think that I can modify the web.config file to allow anonymous access.

Here is my code:

<configuration>   <connectionStrings>     <add name="" connectionString="Data Source=;User ID=;Password=;persist security info=False;initial catalog=;" providerName="System.Data.SqlClient" />   </connectionStrings>

    <system.web>     <compilation debug="true" targetFramework="4.0" />

    <authentication mode="Windows">       <forms loginUrl="~/Account/Login.aspx" timeout="2880" />     </authentication>

    <membership>       <providers>         <clear />         <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionStringName="ApplicationServices" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="false" requiresUniqueEmail="false" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" applicationName="/" />       </providers>     </membership>

    <profile>       <providers>         <clear />         <add name="AspNetSqlProfileProvider" type="System.Web.Profile.SqlProfileProvider" connectionStringName="ApplicationServices" applicationName="/" />       </providers>     </profile>

    <roleManager enabled="false">       <providers>         <clear />         <add name="AspNetSqlRoleProvider" type="System.Web.Security.SqlRoleProvider" connectionStringName="ApplicationServices" applicationName="/" />         <add name="AspNetWindowsTokenRoleProvider" type="System.Web.Security.WindowsTokenRoleProvider" applicationName="/" />       </providers>     </roleManager>

  </system.web>

  <system.webServer>      <modules runAllManagedModulesForAllRequests="true" />   </system.webServer> </configuration