PROBLEM TO BE SOLVED: To provide a shared security platform capable of enhancing the security against a password hacker attack and reducing a security management operating cost.;SOLUTION: Upon the receipt of a packet from remote connection terminals 50, 51, an SSL-VPN gateway apparatus 3 identifies an enterprise from data of the packet, allows a concerned enterprise Web server to output a password entry menu to the remote connection terminals 50, 51, transfers passwords from the remote connection terminals 50, 51 to an authentication system 4, and obtains an authentication propriety response from the system 4. When the authentication propriety response indicates authentication OK, the SSL-VPN gateway apparatus 3 transfers the packet to a pre-specified address, executes communication, and executes interruption of the session when the number of consecutive times of authentication NG exceeds a preset threshold value. An illegitimate intrusion prevention system 2 watches port scanning.;COPYRIGHT: (C)2006,JPO&NCIPI
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