IPv4/IPv6Access Gateway Design And Implementation Of Authentication And Control Module

With the development of Internet technology and the increasing demand for network users, broadband and IP network has become the development trend. Access Gateway is a network management and operation of broadband backbone edge equipment. The thesis is concerned with IPv4/IPv6Access Gateway Design and Implementation, aimed to provide functional and flexible management for enterprise-class features.Author completed the following tasks:(1) overall gateway system solution is designed. Through in-depth analysis of gateway technology, Linux is choosed as the development environment, and Netfilter framework and RADIUS (Remote Authentication Dial In User Service) protocol technology is used. The designed system consists of11modules.(2) web authentication module and network control module are designed and implemented. Extend RADIUS protocol, design local database and achieve RADIUS authentication client program by using open source freeradius software; Use CGI to achieve network online and offline program; After developing the stateful inspection engine program, provide authentication mode automatically switches; In order to achieve bandwidth sharing function, design and implement user space and kernel space "ipmany" module; Use iptables tool for both ipv4and ipv6to achieve network access control; Design and implement the real-time online user detection procedures.(3) Case is deployed and verified. Specific application is tested to verify the overall system function.Cases have proved that the system in terms of stability, scalability, construction costs has great advantages, with a larger market value.