The Research And Design Of 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.In this paper, we have deeply and systematically studied the concept, the Primary Principle, the working mode and the key technologies, and we have designed the SSL VPN and developed the key module of it. The main work of this paper is as follows:1. Compared SSL VPN and IPsec VPN, which supports to point out the limitations of the traditional SSL VPN in application and to put forward corresponding solution. And mainly studied the key technologies of SSL VPN.2. Analyzed the SSL Protocol and improved it, which added the SSL Control Protocol so that formed the secure and effective highly security tunnel Protocol and made up the main flaws to support the VPN.3. On the basis of the designing of the SSL VPN system, combining the SSL Control protocol, proposed the implementation of the role access control, designed an SSL VPN server. And designed the SSL Control Protocol, and studied the key questions considered to implement the SSL VPN server.4. Explored the SSL VPN client implemental technologies, and designed and implemented an SSL VPN client using Java Applet, which supports B/S applications and C/S applications.In summary, this paper has done the thorough research in the SSL VPN key technologies and the system structure, which built the foundation of the development and the practical application of SSL VPN.