Research Of SSL VPN System And It's Application On Campus Network

Virtual Private Network (VPN) is a technology of building private network through open Internet. The word"Private"means it has no corresponding physical network but shares circuits with other traffic. The word"Private"means the data traffic is secret. And it is only the given receiver who can receive the data.VPN based on Secure Socket Layer (SSL) protocol is researched in this paper. SSL VPN is a new technology in VPN research field. And it's application and exploitation will be developed well in the future. VPN theory is introduced as a base in this paper. The structure of SSL protocol and the function principle of SSL VPN system are dissertated. The method that SSL VPN solve secure problem such as authentication, key-exchange, cryptography and data digest is researched as emphases in this paper. Practical arithmetic that will be applied to building campus VPN later is analyzed here.Campus network is an important base of researching network technology. Based on the analysis of the actual network structure of campus network, the campus VPN system is designed and built. This system adopted SSL VPN technology, which solved two problems in our campus network. First, there are more than one campus areas in a University. But the resource is often centralized in the main campus area network. Building campus area Intranet VPN using SSL VPN technology is the cheapest way, which make intramural resource share come true. Second, teachers often work out of campus, which need access intramural data of campus network. Building long-distance access VPN is the simplest way to solve this problem. Testing of the campus VPN system verifies the availability of the plan to some extent. It is proved that VPN can break the regional limit of the campus network and give better administration means of the campus network.