Allow both authenicated users AND anonymous access for intranet setup

Hi,

I have a intranet setup using coldfusion, I use windows authentication to log people in using CFLDAP, application.cfm checks for the logged in session variable, if its blank it triggers cfldap to log the user in. So as it stand users need to be logged in to access any page of the intranet.

My intranet works by including pages passed in the url to the index page ie index.cfm?page=welcome.

Is there anyway I could modify this to give access to anonymous users?

Thanks in advance