The Research And Development Of AAA Management Based On IPSec In VPN

Now the technology of VPN is applied on the Internet and Electronic Business widely. The Protocol of IPSec becomes be the easiest extended and integrated project because of its strong function. Compared to the VPN's technology, the development of VPN's management products is too slow to satisfy the extension of application. By deeply study and analysis of VPN and IPSec, the thesis introduces the technologies of VPN, such as kinds of VPN, encryption, tunneling and so on. It also introduces the constitution, work modes and application of IPSec. It recommends the conception AAA, every parts' function and several often used AAA protocol. The thesis uses the thinking of scattered management and strategic configuration of tunnel connection, then presents an AAA management system architecture based on IPSec's VPN. It designs a set of communication protocol.. Every type packages is demonstrated in detail in the aspect of format, function, transmission and meaning of every field. Based on the specialty of IPSec, it defines user data base and chiefly variables' structure used by the system. It explains the important technologies used in the system. It uses several methods to improve system security, such as MD5 algorithm, 3DES algorithm and OTP system. To optimize the capability of server, the system uses hash table, multi-thread and shared memory to improve server's running speed . At the end of the thesis, it uses an example to illustrate how to install and configure VPN system and its management system.