Abstract: Provided is an epoxy resin which can improve the durability when used with a rubber material, and a method of producing an epoxy resin. In the present disclosure, a diene-based polymer is grafted onto a main chain of an epoxy resin.

Abstract: 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.

Abstract: A communication device includes a receiver, a data processing unit, a routing table, and a transmitter. The receiver receives a certain packet from one of a plurality of networks. The data processing unit processes the certain packet and identifies a use application that is an application used for processing another packet transmitted and received in a network that is a relay destination of data obtained by use of the certain packet. The routing table associates, for each of the plurality of networks, a transfer route that is used in the network with identification information on an application that processes the another packet transmitted and received in the network. The transmitter generates a transmitting packet including the data and transmits the transmitting packet using a transfer route that is associated, in the routing table, with the identification information that identifies the use application.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A management terminal belonging to a first network periodically receives a registration request of information of a communication terminal belonging to a second network from a gateway device belonging to the second network. A control device belonging to the first network receives a communication request that a communication path be secured between the management terminal and the communication terminal from the management terminal. The control device includes the communication request in a latest response to a registration request received from the gateway device periodically and transmits the communication request to the gateway device. The gateway device permits an access to the communication terminal from the management terminal via a tunnel formed in response to the communication request.

Abstract: 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.