Study Of Virtual Tunnel Technology Based On SSL VPN

Along with the constant development of intra-company network, the scope is of company network is expanding from local networks to cross-district or cross-city net works or even cross country networks. How to utilize current Internet to construct a secured intra-company network will become a hot spot of research.Virtual Private Network (VPN) provides a blue print for the secured data transmission of company networks in Internet. Intra-company network powered by VPN technology will avoid the construction of company-special network by special leased line, which will then reduce the cost. Company-special network can support long-distance access and will direct the further development of company networks because of its strong expansibility, conveniency of management, and achieved full-control.As mobile office became more popular, How to make Remote Access becoming simpler and more secure using VPN will become a hot spot of research.SSL VPN is the easiest and most secured technology for the long-distance access to sensitive company data. Comparing with complex IPSec VPN, SSL realizes the long-distance data connection through a simple and easy way and can be utilized on any browser with SSL protocol installed. While to achieve this through traditional IPSec VPN, certain client software must be installed.SSL virtual channel is a kind of technology which by using user-transparent SSL VPN client constructs a virtual network through connecting distant client and intra-network. On this virtual channel, trusted users can log on the entire inner network and any application based on IP is supported which then overcomes the shortcoming that SSL VPN supports applications exclusively based on web.This paper adopts Network Driver Interface Specification (NDIS) Intermedia Driver technology to exploit client. That NDIS mesosphere driving technology acts under protocol layer, above physical network card driving layer, has nothing to do with protocol and entirely intercepts and captures network envelops are the reasons why SSL VPN has more powerful function of supporting non-web applications.Virtual channel technology based on SSL is the future developing line for SSL VPN, a...