HOW TO ATTACH A USER TO A SPECIFIC MAC ADDRESS

Hello, How do I define a user in users file so that the user can only be accepted from a given mac address ? In the following exemple , what must I replace <.....> with in the check items ? : user1 User-Password == passwd <.....> Thanks in advance. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com