Based On IPSec VPN Employment Network Security Plan

Virtual Private Network (VPN) becomes the new tendency of the network development because it Synthesized the virtue of traditional data network and the sharing public data network. The VPN technology based on IPSec protocol is a kind of perfect network security technology .We design a suit of solutions in this paper , and analyze the network security communication question of Labor and Employment.In this disquisition ,we design a VPN system through Internet , any one in our network can communicate safely and rapidly .We use tunnel technology in to achieve our objective .There are three key questions in the implementation process: AH provides protection for IP header ,but NAT revise the source address field when actualizing the network address translation ,so it causes IPSec's certification useless ;when ESP encrypt data-bags ,TCP will also be encrypted, so it induces NAT's certification useless ;In view of the question ,we design a kind of effective solution ;we make use of IP_IN_IP tunnel protocol ,and upbuild a IP_IN_IP tunnel among gateway ,then data can be commuted between Geteways.Then we analysis the hidden trouble of the network and constructed a safe network platform .this design use a atandpoint which integrate Initiative security defensive system and passive security defense system .It has formed a dynamic and comprehensive network security solution.