Research And Implementation Of IPSec VPN In IPv6

Network security is always one of the most important problems in the research of network.At the beginning of this dissertation, we discussed the state of security on Internet, analyzed the factors caused frangibility of Internet and familiar vulnerabilities, and put forward some means to secure Internet, thereby imported Virtual Private Network (VPN) technology. After the briefly present the origin and features of Internet Protocol Version 6 (IPv6),the paper detailedly introduced the conception, characters,security technologies of VPN, and main tunnel protocols used to implement and deploy VPNs. After analyzing and comparing these technologies of realizing VPNs, we choosed IPSec. Then, the paper analyzed in the IPSec structure, function, work mode, and its components such as Authentication Header (AH), Encapsulating Security Payload (ESP), Internet Key Exchange (IKE), encryption and authentication algorithms, Security Association, Security Policy, and how they cooperate with each other in order to secure IP packages.Considering the better network performance of IPv6 enabled IPSec than IPv4 and the contradictions between traditional VPN and NAT in IPv4 network, so the paper educed the research on IPv6 VPN is more significant. At present, most studies on IPv6 enabled IPSec VPN rested on theory, less about realization. This paper just about put the main research work on the realization. After comparing three implementation modes of IPSec in IPv6, the paper choosed the mode of integrating OS source codes with IPSec. The main work and research productions of this dissertation are:1. Presented some key tunneling technologies what realized VPNs, and choosed IPSec to implement VPNs. Lucubrated on IPSec's framework, function, work mode, and components such as AH...