| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a virtual network environment where a user can utilize communication applications without recognizing a relay path in a network communication system where a client and a server make communications under an environment in which firewalls are interposed. SOLUTION: A communication relay program that relays communications between a communication client program on a client and a communication server program of a server is started on relay servers 304, 305 and 306 such as firewalls, a path information table to control data relay paths is provided to the client and the relay servers 304, 305 and 306, and the communication client program on the client executes processing of selecting any of communication available relay servers 304, 305 and 306 from the client on the basis of the data relay control table and executes processing of connection to the relay program of the relay server decided by the processing above and requesting the relay server to relay communications with the communication server program on the sever.</p> |
