[Zope] IP restriction

Hello. I'm new in this list, and I hope we can help us. My first question is: I want that only a group of IP's can acces to a directory and his subdirectories. Do you now how can I do this restriction? I dont`t want that the user login zope, I only want to see his IP and permit or not permit pass it to the directory. Thanks. Rubén ) ( ) ( )