Linux系统下VPN的研究与部署实现
本文首先介绍了一些VPN网关的背景知识，然后分别介绍了VPN网关的具体实现步骤以及实现的效果。实验环境选择了具有开放源代码的Linux系统作为VPN网关的实现平台即操作系统,利用Linux系统自身对于IP包的处理过程来进行VPN处理。数据传输协议使用了pptp，可以直接使用window带的client直接拨号，不需要额外安装。随后，在搭建的实验环境下进行了多项测试实验，通过实验，进一步了解VPN的过程，并找出其中的问题。最后，对工作进行总结并提出下一步工作的方向。10490
关键词： 虚拟专用网；VPN网关；pptp；iptables
Linux Systems Research And Deployment Of VPN Implementation
Abstract: The connectivity and openness provided by the Internet make the exchange of information and sharing become reality, which brought tremendous benefits for the society; meanwhile, it provides an opportunity for Internet hackers and computer crimes. The protection of network and information security has become a core issue of growing concern. Therefore, as a network security appliance, VPN gateways are widely used. More and more VPN gateways are deployed in the network; What’s more, the demands of a fast and easy to use VPN are increasing by people.
This paper describes some background knowledge of the VPN gateway, and then introduced the VPN gateway and the realization of the concrete steps to achieve the effect. I chose to have the open-source Linux system as a VPN gateway implementation platform referring to operating system, using the Linux system itself for IP packet processing for VPN processing. I used pptp as a transmission protocol, and you can directly use the client window with direct dialing, no additional installation. Subsequently, in the built environment for a number of experimental test experiments, we learn more about the VPN process and find out the problems. Finally, we conclude the work for future work directions.
Keywords: VPN; VPN gateway; pptp；iptables
目录
摘要 i
Abstract i
目录 iii
1 绪论 1
1.1 VPN 概述 2
1.1.1 VPN 的优缺点 3
1.2 VPN的实际应用意义 4
1.2.1 VPN的定义： 4
1.2.2 vpn是现在大部分企业为确保自身网络资源安全传输选择的方式，它的具体优势表现在以下几个方面 ： 5
1.2.3 网路安全的意义实例： 5
1.2.4 实际有效的应用 6
2 VPN的应用与实现 7
2.1 VPN的应用领域和设计目标 7
2.1.1 VPN的主要应用领域 7
2.1.2 VPN的设计目标 9
2.2 实现VPN的关键技术和主要协议 10
2.2.1 实现VPN的关键技术 10
2.2.2 VPN的主要安全协议 11
3 Linux下VPN的实现 13
3.1 平台选择以及工具使用 13