VPN Technology In Network Research And Application

Based on the system investigation and study , this topic aimed at the issue that traditional Internet service couldn't satisfy users' demand. (Traditional Internet only provides simple service such as browsing, email and, without service guarantee and jurisdiction and safety mechanism. Another problem is that contact surface is complex and not easy to grasp), This thesis proposed the design goal, principle and settlement of VPN technology network. The solution has realized the virtual special-purpose net's function with the public special-purpose net.Liaoyang police station's existing comprehensive service data networking system is quite complex, The connection between the bureau and the sub-bureau, the traffic police crew, the fire crew, the local police station, the city team and the countryside team are through the dialing way. Influenced by net speed limit, the internal file processing speed is specially slow, and the work service also comes under the influence. Meanwhile the internal data couldn't be shared. Moreover, it has little security, and the network security cannot be effectively guaranteed. If the user needs some new services, he will need to fill in many documentary evidences and wait for a quite period of time for enjoying the new service. What's more important, the terminal device of the beginnings and ends is expensive, and it also needs the a certain specialized technical personnel, which will increased the cost undoubtedly. And its existing comprehensive service data couldn't immediately connect with any net unit in the world as the Internet do.In order to solve the above problem, the Liaoyang Telecommunication NetworkCompany computer application development center and Liaoning Information Vocational Technology Institute Huawei laboratory proposed the development research work tentative plan which based on the existing equipment and technical force. The plan is to build a VPN network with the optical fiber straight connecting way, and to connect the sub-bureau and the city bureau original north electricity Passport 6,480 routers by the 10/100M (traffic police crew, fire crew, the Liaoyang county, and Lighthouse county have already completed respective WAN and local area network. Police station uses the DDN special line to connect with fire crew, and broad electricity optical cable with traffic police crew). Considering the current VPN way, I think the MPLS VPN is the most suitable technology to the public security service realization and the secure isolation, and divides it to be an independent VPN, realizing the secure isolation functions between public security network and other user networks.This thesis has narrated the thought and the realization process of using the VPN technology to realize public security private network in detail, attaching the system analysis situs chart, and with the suitable hardware equipment. The technology has realized the security, effectiveness and reliability in the use of public security private network.