Hi friends, I have aproblem ( Bug??? ) with ISA Server. I have configured it cache mode and have selected the "Ask unauthenticated usersfor identification" option in the outgoing web request tab. With this configuration, when a client tries to access to a site that is not permited by a site and content rule or by a protocol rule, it is prompted to identificate and the window shows a line with "Firewall: 10.1.1.1" ( I don't know why because I haven't the firewall service installed). What I need is that if a user tries to get a site that is not allowed it will receive an error web page indicating that this site or protocolo is not allowed. If I uncheck the "Ask unauthenticated usersfor identification" option it works properly and returns the error page. Do you know how can I configure ISA to do this?? Is it possible?? Thanks in advance and best regards, Julio.