1. A method for configuring a firewall for use in a computer system that comprises at least one first device disposed inside the firewall and at least one second device disposed outside the firewall, the method comprising an act of: (A) establishing at least one rule for the firewall that determines at least one filtering function that the firewall performs on communications between the at least one first device and the at least one second device, wherein the at least one rule employs at least one filtering parameter that is based on at least one connection security level established for a connection between the at least one first device and the at least one second device.