| 摘要 |
A proxy server is communicably connected to another server. An association storage unit stores proxy information and server information. A determination unit determines, when an access request transmitted by the client is received, whether or not the server specified by the access request is actually accessible. A first access request transfer unit, when the server specified by the access request is determined to be actually inaccessible, searches the association storage unit using the server information identifying the server specified by the access request and transfers the access request to the proxy server identified by the proxy information associated with the server information. A second access request transfer unit, when the server specified by the access request is determined to be actually accessible, transfers the access request to the server specified by the access request.
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