| 摘要 |
<p>PROBLEM TO BE SOLVED: To support efficient implement of a system compliant to the PCI DSS.SOLUTION: A DB server 74 transmits a packet which designates an address of the DB server 74 as a transmission source address and an address of a device in an external network as a destination address, in the case that communication with the device in the external network is needed. A user A-FW 32 receives the packet transmitted from the DB server 74, and transfers the packet to a relay server 64 in the case that the designated transmission source address is an address of an inner segment 70. The relay server 64 changes the transmission source address of the packet transferred from the firewall to the address of the relay server, and transmits the packet. The user A-FW 32 receives the packet transmitted from the relay server 64, and permits to transfer the received packet to the external network in the case that the designated transmission source address is an address of a DMZ 60 and the packet satisfies a predetermined criterion.</p> |
