ADDRESS SECURITY CONTROL SYSTEM

PROBLEM TO BE SOLVED: To obtain an equipment preventing the unnecessary consumption of throughput by providing an address table, a detection means, a comparing means, a filtering means and a control means. SOLUTION: The port corresponding table 900 registers an address assigned to a communication terminal or a network by each port of a communication equipment. The detection means 100 detects a communication address from a data frame received by each port. The comparing means 200 compares the address detected by the detection means 100 and the address registered in the table 900. When the two addresses compared by the comparing means 200 coincide with each other than, the equipment transmits received data frame to a port connected with a communication destination address. On the other hand, the means 200 starts a part address filtering means 300 when the two addresses do not coincide with each other.