Design And Implementation Of IPv4/IPv6 Translation Gateway

With the rapid development of Internet, many problems brought by IPv4 have been coming froth: the address resource is using up, current IP protocol is unsuitable to new network application and security is unable to ensure. The appearance of IPv6 brings a nice outlook for Internet. It's necessity for IPv6 to replace IPv4. During the transition from IPv4 to IPv6, there're many transition techniques, including NAT-PT.In this thesis, a translation gateway is introduced, both the design and implementation. First, the thesis begins with the characteristic of IPv6 and the compare between IPv4 and IPv6. At the same time, some other related protocols are introduced. Secondly, some translation techniques from IPv4 to IPv6 are discussed, which are used at present. In this part, their characteristics are analysed in detail, especially NAT-PT technique, which is used in this system.Next, in the introduction of overall design and module design, the design principle and the choice among the design schemes are discussed, and also the course of setting up system environment is described. Besides these, some related techniques used during the development are introduced. Following, according to the partition of the modules, the working relationship between each module is introduced. In addition some details are described, such as functions, realizing methods and flow, etc.In the end of this thesis, the environment in which the translation gateway runs is introduced. The analytic result with the test datum is given in the end. The datum is recorded when the gateway is working.