The Research And Design Of Network Secure Access Flat Based On Diameter Protocol

AAA protocols were initially deployed to provide dial-up PPP and terminal server access. With the growth of the Internet and the introduction of new access technologies, including wireless, DSL, Mobile IP and Ethernet, routers and network access servers (NAS) have increased in complexity and density, putting new demands on AAA proto- cols. RADIUS protocols are not competent for demands on current AAA services of networks based on IP, especially in NGN era in the future.Taking into account the development of Internet, the next generation AAA techno- logy is needed to solve many existing problems in AAA services. Diameter protocol has been appointed AAA protocol standard by IETF.In this dissertation, the primary work includes:Firstly, the analysis of difference between the Diameter protocol and Radius protocol is done. The Diameter protocol not only keeps compatibility with Radius protocol, but also overcomes many shortcomings of Radius protocol.Secondly, the thorough research and analysis of Diameter protocols itself is done. The foundation and its application are analyzed.Thirdly, expatiate on the security part of the Diameter protocol, include the IPSec protocol, TLS protocol and the CMS protocol.Finally, design a model of the Diameter application on the Network Access and several parts of it, such as the management platform, the Diameter server and so on.