I have an ISA Server 2000 fully updated with Windows Server 2003 and Antivirus fully updated, but some of the PCs in the internal network became infected with Bobax.C and generate a lot of traffic on ports 5000,135,445 which causing the ISA Server to block access to the Internet. The Server by itself can navigate but any user in the internal net can not. I tried blocking traffic from this ports using a port access rule denying traffic with these ports as destination, but still get wacked by the virus traffic. With only one PC with the virus active, the server won't let anyone to navigate. I wonder if this is normal behaviour of the ISA Server or I missing something. Any help would be greatly appreciated. Regards, Alfredo Medina Universidad Francisco Marroquin Guatemala