Fujitsu Corporation

Tomoyuki Sone

Kazumine Matoba

Kei Hamada

Yasunori Terasaki

Daichi Tanaka

Chiaki Endo

Toshiyuki Okamura

Upon receipt of a packet addressed to a virtual IP address assigned to each first device from a second device outside a base network, a processor identifies a base relay apparatus that accommodates the first device, to which the virtual IP address is assigned, on the basis of the virtual address and a protocol type of the received packet, and also identifies a reception port number of the identified base relay apparatus, which corresponds to a combination of the virtual IP address and the protocol type of the received packet, from among reception port numbers each assigned to a combination of the first device accommodated to identify a transfer destination, and a protocol type. Then, the processor relays the received packet to the identified reception port number of the identified base relay apparatus.

Relay apparatus, relay system, and relay method

The network separation device, comprising: a processor configured to perform as a selector, a first relay device and a second relay device; the selector that selects a packet relayed between networks; the first relay device that includes first routing information and outputs to the selector a first packet; the second relay device that includes second routing information and outputs to the selector a second packet, wherein: the selector holds a relay rule of an application layer, selects a first relay packet, and outputs the first relay packet to the second relay device; the second relay device relays the first relay packet to an apparatus registered in the second routing information; the selector selects a second relay packet and outputs the second relay packet to the first relay device; and the first relay device relays the second relay packet to an apparatus registered in the first routing information.

Network separation method and network separation device

A relay apparatus includes a reception processor configured to receive data corresponding to any one of plural types of communication protocols from a first network, analyze the structure of the received data, and convert information commonly included in the data of the communication protocol into common data of a predetermined format, a transmission processor configured to transmit data corresponding to any one of the plural types of communication protocols to a second network, and a relay controller configured to control the communication protocol and destination of the received data to be transmitted from the transmission processor to the second network, based on the common data and a relay rule which is defined for the common data.

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Yokohama, Japan

Tomoyuki Sone