毕业设计（论文）诚信声明书本人郑重声明：在毕业设计（论文）工作中严格遵守学校有关规定，恪守学术规范；我所提交的毕业设计（论文）是本人在指导教师的指导下独立研究、撰写的成果，设计（论文）中所引用他人的文字、研究成果，均已在设计（论文）中加以说明；在本人的毕业设计（论文）中未剽窃、抄袭他人的学术观点、思想和成果，未篡改实验数据。本设计（论文）和资料若有不实之处，本人愿承担一切相关责任。学生签名：年月日I摘要本文首先介绍了VPN的定义和研究意义，接着介绍了实现VPN的关键技术（包括隧道技术,加解密认证技术，密钥管理技术，访问控制技术）以及实现VPN的主要安全协议，PPTP/L2TP协议、IPSec协议，为VPN组网提供了理论指导。最后通过构建中小企业的虚拟专用网，全面介绍了在Windowsserver2003ISA2004环境下站点到站点和站点到客户端的VPN的配置，为企业的VPN构建提供参考和借鉴。关键词：隧道，L2TP，PPTP，IPSecIIAbstractThispaperfirstintroducesthedefinitionofVPNanditsstudyimplications.AndthenintroducesthekeytechnologiesforimplementingaVPNwhichincludestheTunneltechnologyanditsmainsecureprotocols,PPTP/L2TPprotocol,IPSECprotocol,SOCKSv5protocol,AllthesetechnologiesprovidethetheoreticalbasesforbuildingaVPNnetwork.Finally,byconstructinganenterprisevirtualprivatenetwork,IintroducedtheconfigurationofsitetositeandsitetoclientVPNundertheWindowsserver2003ISA2004environment,itprovidesthereferentialguidelinetotheVPNconstructioninenterprises.Keywords:Tunnel,L2TP,PPTP,IPSecIII目录1绪论......................................................................................................................................11.1VPN的定义.....................................................................................................................11.2VPN的工作原理.............................................................................................................11.3VPN的研究背景和意义.................................................................................................22VPN的应用领域和设计目标.............................................................................................42.1VPN的主要应用领域.....................................................................................................42.2VPN的设计目标.............................................................................................................53实现VPN的关键技术和主要协议....................................................................................73.1实现VPN的关键技术....................................................................................................73.2VPN的主要安全协议.....................................................................................................93.2.1PPTP/L2TP..............................................................................................................93.2.2IPSec协议.............................................................................................................104实例分析............................................................................................................................124.1需求分析........................................................................................................................124.2方案达到的目的............................................................................................................134.3VPN组建方案网络拓扑图................................................................................
