| 摘要 |
PURPOSE: A device for sharing a single IP(Internet Protocol) address without an NAT(Network Address Translation) in an IAG(Internet Access Gateway) for a local network and a device therefor are provided to assign the same public IPs to many PCs to access the Internet, and to cut off a broadcast packet received from the local network in an Internet AP(Access Point), thereby preventing IP conflict. CONSTITUTION: A local network AP(280) connected to a local network inputs or outputs a packet. An Internet AP(260) connected to the Internet inputs or outputs a packet. A PT(Port Translation) table(290) stores nodes having single IP addresses, public port numbers corresponding to each node, local port numbers corresponding to each node, and MAC addresses corresponding to each node. An address translation process(270) changes the public port numbers in predetermined assignment method by designating the local port numbers and the MAC addresses included in an IP packet as identifiers, when the IP packet is received from the local network, records the changed numbers in the PT table(290), and searches a public port number when the IP packet is received, then searches a local port number corresponding to the public port number.
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