| 摘要 |
PURPOSE: A network security system through a VPN(Virtual Private Network) and a method therefor are provided to perform network security between PCs by transmitting data encoded and decoded by an IP(Internet Protocol) security protocol, through the VPN, in a network communication through an SPU(Security Processing Unit) and an Ethernet. CONSTITUTION: An Ethernet(12) connects to a line interface unit(11), and transmits and receives data with a plurality of packets. An SPU function unit(13) authenticates and confirms a user through a VPN, for transmitting and receiving the data of the Ethernet(12). If an external user who is not authenticated accesses, the SPU function unit(13) controls the access by an encryption algorithm. A memory unit(14) compares and packet information of the data transmitted through the Ethernet(12) with stored packet information. A CPU(15) analyzes packet information of the data transmitted and received according to the authentication control through the SPU function unit(13), and transmits analyzed packet information to the memory unit(14). A console unit(16) decides policy information of the data analyzed through the memory unit(14) and the CPU(13).
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