AuthWebConfig.xml

<configuration>
    ...
    <system.identityModel>
        <identityConfiguration>
            <claimsAuthenticationManager type="CustomAuth.CustomAuthenticationManager, CustomAuth" />
        </identityConfiguration>
    </system.identityModel>
    ...
    <system.webServer>
        <modules>
            <add name="ClaimsTransformationHttpModule" type="Jbssa.Core.Mvc.Auth.ClaimsTransformationHttpModule" />
            <add name="SessionAuthenticationModule" type="System.IdentityModel.Services.SessionAuthenticationModule, System.IdentityModel.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" />
        </modules>
    </system.webServer>
    ...
</configuration>