ACCESS CONTROL DEVICE, AND ACCESS CONTROL METHOD

摘要

An access control unit and an access control method are provided for controlling an access to a secure host efficiently by reducing the consumption of resources such as a memory. In this access control device, an access control unit (302) performs an access control in accordance with whether the target IP address and the sender IP address of a packet are the IP address of a secure terminal or host or the IP address of a general terminal or host, while referring to a host list stored in a host information storage unit (304). The host information storage unit (304) stores the domain name and the IP address of a general host in an external network (200), as the host list. A host list updating unit (305) inquires the host list of the host information storage unit (304) whether the unregistered host is the secure host or the general host, and updates the host list in accordance with the result of the inquiry.