Unauthorized Communication Program Regulation System and Associated Program

An unauthorized communication program regulation system in a client-server system which has a centralized control server for controlling client computers in a local area network, wherein said centralized control server is provided with distribution means for distributing file patterns for identifying various kinds of unauthorized communication programs to each client computer under server control through the local area network,

• said client computer is provided with a filtering module for performing monitoring and regulation processing on communications originating from said computer, and
• said filtering module is provided with a database for storing said file patterns acquired from said centralized control server, communication detection means for monitoring communication events originating from a communication module started by said client computer and detecting the occurrence of a communication start request to other computers, inspection means for comparing the file pattern of the communication module of a request source of said communication start request to the file patterns within said database and inspecting whether or not said communication module is an unauthorized communication program, and communication regulation means for regulating the communication of said communication module before the execution of said communication start request when said inspection means has judged it to be an unauthorized communication program.