| 摘要 |
PROBLEM TO BE SOLVED: To provide a network communication system 20 to safely communicate data through paths 38, 34 which are not safe among agents 22, 82 and consoles 24, 72. SOLUTION: The agent 82 exists in a safe network segment 76 and the console 72 exists in a network segment 74 at another place in a LAN 70. The agent 22 can exist in a safe LAN 28 and the console 24 can exist in a LAN 34. The system is accompanied by the path 38 as a wide area network such as the Internet 26. The data can be communicated by various methods to use an electronic mail, tunneling protocols such as FTP, HTTP or VPN or proprietary protocols. As a practice, there is also a case that an allocated port is statically or dynamically used, or there is also a case that the network communication system 20 finds an open port by a program.
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