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Server device and communication system

A communication system and server technology, applied in the field of data sharing, can solve problems such as the reduction of security intensity, and achieve the effect of maintaining security and high security

Inactive Publication Date: 2007-09-26
MURATA MASCH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to enable external connection to the server, it is necessary to leave a predetermined port in the firewall, so there is a problem that the security strength is lowered.

Method used

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  • Server device and communication system
  • Server device and communication system
  • Server device and communication system

Examples

Experimental program
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Embodiment Construction

[0040] Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic diagram of a communication system according to this embodiment. This communication system includes a data management device 1 installed in a LAN (Local Area Network), a gateway file server 3 and a client device 4 installed in a WAN (Wide Area Network). As shown in the figure, a plurality of LANs are connected to the WAN, and a data management device 1 is arranged in each LAN. Of course, a plurality of data management devices 1 may be connected to one LAN.

[0041] The LAN is a private network, and a firewall 2 is set between the LAN and the WAN. Therefore, access to computers in the LAN is restricted from the WAN side. The client device 4 is a terminal used by a user. The user performs data update processing on the data management device 1 by referring to the data stored in the data management device 1 using the client device 4 . The client de...

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PUM

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Abstract

A data management device is provided in a Local Area Network inside a firewall, and a server is provided in a Wide Area Network outside the firewall. When the data management device carries out a TCP connection request to the server and a TCP connection is established, the data management device transmits index information to the server. The established TCP connection is held. The client device acquires the index information from the server, and carries out a file access request to the server according to the index information. The server uses the held TCP connection to acquire a file from the data management device, and transmits the file to the client device.

Description

technical field [0001] The present invention relates to a data sharing technique using a network. Background technique [0002] There are various communication systems that utilize servers connected to a network. For example, a client device and a data server are connected via a network, and the client device accesses data stored in the data server to perform various applications. [0003] Among them, in the case of a system in which a client device and a data server exist on the same network, the need to protect data is not so high. For example, in a system in which personal computers used by employees of each company are connected to a data server installed in an office LAN, there is generally no problem for the data server to receive connection requests from the personal computers. [0004] And if the server is connected to a public network such as the Internet, the situation is different. The server is placed in a private network such as a general LAN, and a firewall ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/54H04L29/06H04L12/66
CPCH04L63/0281H04L63/029H04L67/06
Inventor 谷本好史
Owner MURATA MASCH LTD