| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To appropriately assign an address to each user and to achieve the appropriate management of the address. <P>SOLUTION: In a network address management system having a router 20 connected between a DHCP client 30 and a DHCP server 10, when the number of entries in a user address management table 25 exceeds the number of distribution IP addresses for each sub I/F, a registered old distribution IP address is deleted, an IP address in a response message is newly registered, access to a backbone network using the deleted IP address is refused even at an IP transmission source address filter section 23, and illegal access is prevented. <P>COPYRIGHT: (C)2004,JPO</p> |
