Hi, My client has a requirement where he would like to ensure that a user authorized to squid should be able to access the internet from only one I.P Address. Her requirement is that even if one of her users shares her password with the second user, the second should not be able to login except from the first user's machine, not even on the second user's machine or any other machine in the network for that matter. The client has around 1000 users in her organization who frequently share their user names and password with other users. Any pointers/urls in this direction would be most welcome. If this question has been answered previously in this mailing list, a pointer in that direction would suffice. Thanks in advance. Regards, -- Vivek Varghese Cherian Senior Systems Administrator Website : http://vivekvc.freeshell.org Blog: http://vivekvc.wordpress.com Linkedin: http://www.linkedin.com/in/vivekvc IRC: Vivek and ViveKVC on both Freenode and OFTC GPG Key fingerprint: 0F53 447E A8D1 C4F7 C14E F117 A040 E935 7DFA D159