Patent ID: 7260839
Filing Date: 2007-08-21
Classification: H04L

Abstract:
1. A security wall system for a network device connected to a network comprising: a firewall system for protecting a security of an information processing device from the network; a viruswall system for performing a virus check on data from the network; a network system; a multi-OS controller for controlling the firewall system, the viruswall system and the network system so that they can be executed on independent operating systems; and a shared memory managed by the multi-OS controller and shared by the operating systems, wherein the firewall system, the viruswall system and the network system communicate network data to each other through the shared memory, and wherein when the firewall system detects a port scan from the network, the multi-OS controller lowers an execution priority level of the firewall system to the lowest level, starts another firewall system and generates another network path.