Hi, I have a ISA Server as StandAlone Server on net 126.1.X.X, I created the local users on ISA Server and created a Protocol Rules to permit this users to access the Internet, I wanna that always the users open the Internet Explorer the ISA Server open the Window asking for user, password and domain for authentication, but this just work for computers on net 126.1.X.X, I have some user on net 192.168.11.X and I installed the firewall client in those users, created routes into the Windows 2000 of ISA Server for net 192.168.11.X, but when those users open the Internet Explorer, the firewall client remains connected to ISA Server but the browser show the following error message : 403 forbidden - The ISA Server denies the specified Uniform Resource Library (URL) (12202) What can I do ? I created a Client Address Set for net 192.168.11.X and changed the protocol rule to permit access for this Client Address Set, but when users from net 192.168.11.X open the browser, they access Internet without the browser ask for authentication, and won't this way, someone can help me ? Thanks, Alex