Design And Implementation Of Windows CLAT Access System

Since the depletion of IPv4 address,it is a very difficult thing to assign addresses to end users for many networks.So IPv6 begins to be deployed and applied.Compared to IPv4 protocol,the IPv6 protocol has a more prominent advantage in the configuration and mobility management.At the same time,the IPv6 protocol has many new features in the security and IP packet forwarding efficiency.Due to the difference between the IPv4 protocol and IPv6 protocol,they are not compatible.Although they all belong to the network layer protocol.Network equipment and devices are required to be upgraded to support the IPv6 protocol.In the present network environment,the number of IPv4 network equipment is huge.Cost of upgrading or replacing the equipments will be very large,the operation cycle will be exceedingly long.So in the next period of time,they will be coexistence for a long time.IPv4 will be the dominant one at the beginning of the time,the pure IPv6 network will be transited in the future,in this process,connectivity between IPv4 and IPv6 and the conversion of the IPv6 network and IPv4 network is becoming the main technical problems.According to the the transition problem of IPv4 and IPv6 protocol,depended on the mode of operation,which is divided into the following three categories:dual-stack type,translation type and tunnel type.In order to realize the transition of IPv4 protocol and IPv6 protocol,in this paper,a transition solution based on dual translation method is adopted in this paper.The solution is used to combine the stateless translation in the client side with the stateful translation in the core side.It have features like simple and extensible.Besides that,the customer side translation techniques of CLAT system has been widely used in linux.It has been deployed and promoted in some manufacturers of devices.Windows platform has not supported the CLAT technology system yet.The main work is divided into the following sections:(1)Deep learning network-driven programming framework for Windows platform,design and implement the CLAT client's virtual network card driver module.(2)Implement user login authentication function,complete and improve the 464XLAT existing technology,increase the security of the system.(3)Complete the system design,configure the system's test environment and complete the module test and system test.The design of the CLAT system has been achieved on the Windows platform,while the development of the CLAT access system,improved the security of the 464XLAT program.It has practical value for the transation from IPv4 to IPv6.