With the enterprise business developing and internationalizing,the branches distributes all over the worlds,and staffs need to access the enterprise Intranet at anytime and anywhere.It' s a basic and important issue for enterprise to construct secure and low-cost enterprise network.The paper introduces the concept and key technologies of VPN,and puts emphasis on basic framework of software VPN & scheme of enterprise network security based on various VPN technologies.It has been proved in practice that information transmission can be conducted securely by the software VPN server solution,which has certain reference value for the enterprise to build VPN network.%随着企业本身发展壮大与跨国化,企业分支机构遍布世界,员工需要随时随地联入企业网,企业与各战略伙伴需要随时通信.如何构建既安全又廉价的企业网络是当前企业信息化实施的重要基础问题.本文介绍VPN的概念和关键技术,并着重给出商用软件VPN服务器的系统需求和网络架构实现方案.经过工程实践验证,可以安全地进行信息传输,对企业构建VPN网络有一定的参考价值.
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