Design And Implement Of The SSL VPN

With the fast development of information technology and network technology, enterprises continue to strengthen information exchange between Partnerships and government agencies. Remote access security is becoming one of the most important issues for enterprises and government agencies. The VPN technology is to become the first safe choice in the global e-commerce and Internet data transmission by taking advantages of its features.Based on the study of the VPN technology and the analysis of current popular SSL VPN technology, this dissertation designs and implements the SSL VPN solution.This dissertation introduces the common VPN access technology and analyzes its structure and system key technology at first. Then the dissertation presents a flexible SSL VPN solution based on the SSL tunnel, and then explained in detail the background of the development of the system. Then the dissertation accounts for the design and realization of the SSL VPN and explanation of some key technologies. The system provides Internet access for LAN users without changing the network applications; and it is not only focuses on the improvement and expansion of the network function, but also provides better services. Through the design of multi-tier architecture, separate data-processing module, the using of more tunnels buffer technology,the system has improved the efficiency of the transmission , and it achieve the desired performance objectives.As the system designer, the author is responsible for the system architecture design and the realization of SSL VPN. Finally, a comprehensive summary of the advantages and drawbacks of the system and development of recommendations to improve the system are given.