WebPage security via Windows Authentication

Howdy all,

Does anyone know of a way to secure a page via Windows Authentication? I've seen scripts that block out certain IP addresses, and others that prompt the user for a login, but I'm working on an intranet page and for ease of use to my end user, I didn't want them to have to login when they access my page. Basically, I want to restrict my page to a select group of users without them having to login every time they access it (which they will be doing frequently throughout the day).

Would I have to 'table-ize' my group in a SQL table and run some sort of script that references this table onOpen?

Any feedback is greatly appreciated.
Cheers.