...
There are two security options available to use via Tridion without any required set-up in the Profile System: CAS and Generic.
Using CAS, the Yale University login system, access can be limited to all NetID's or only certain NetID's, or any combination of those parameters.
Alternatively, you can use the Genericsecurity option. This allows you to create a custom username and password that users will need to enter the secured portion of your site.
You can create just one custom username and password or multiple possible entries that will grant access, whatever best suits your needs.
...