| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a firewall system and a firewall control method capable of properly executing packet filtering and unauthorized access detection, in a state with the communication by a mobile network being operated. <P>SOLUTION: A home agent 404A acquires an IP address, a port number, and a media type, obtained by call control of a call control relay server 403A and informs a firewall 700 about them. A packet-filtering apparatus 400 of the firewall 700 carries out packet filtering so as to pass an IP packet specified by a set of the IP address and the port number. Further, an unauthorized access monitor 701 extracts, corresponding media type information under predetermined legitimate access discrimination conditions by each media type, monitors the packets on the basis of the legitimate access discriminating conditions, and detects the packets deviated from the legitimate access as unauthorized accesses. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
