Kabushiki Kaisha Toshiba

Shin-ichi Kanno

Masamichi Tateoka

Takashi Suzuoka

Nobuyuki Sawashima

Tetsuya Yamane

A server computer protection apparatus for protecting a server computer by allowing only proper access from one or more client computers to reach the server computer. An access request receiving unit receives, in place of the server computer, access requests sent from the client computers. Each received access request is checked by an access request checking unit to determine whether the received access request is proper or not. An access request transfer unit transfers to the server computer only the access request that is determined as proper, while preventing other access requests that are determined as improper from transferring to the server computer.

Server computer protection apparatus, method, program product, and server computer apparatus

A server computer protection apparatus protects a server computer against DoS attacks, but allows access to the server. The server computer protection apparatus comprises a unit configured to calculate the load state of the server computer on the basis of the number of data requests made upon the server computer, and the number of data responses of the server responsive to the data requests, and for changing the rate of data requests to be transferred to the server, in accordance with the load state.

Systems and methods for protecting a server computer

A retrieval system for performing database retrieval in response to a retrieval request includes a database preparing means for collecting corresponding data to prepare a database under at least a condition that an update frequency range of data serving as a target for index table generation is uniquely assigned to the database, and an update frequency of data falls within the assigned update frequency range, or a mean update frequency of a data group to which the data belongs falls within the assigned update frequency range.

Growing community of inventors

Kawasaki, Japan

Shin-ichi Kanno