中小型企业Intranet及VPN技术研究

中小型企业Intranet及VPN技术研究
 
摘  要：IP网络安全1直是1个倍受关注的领域，如果缺乏1定的安全保障，无论是公共网络还是企业的专用网络都难以抵挡黑客攻击和非法入侵。对于某个特定的企业内部网络Intranet来说，网络的攻击既可能来自网络内部，也可能来自外部的Internet或Extranet，其结果都可能导致企业内部网络毫无安全性可言。随着IP安全标准的问世和无所不在的IP网，VPN现在已经成为大多数企业可行的备选方案。虚拟专用网（VPN）被定义为通过1个公用网络（通常是因特网）建立1个临时的、安全的连接，是1条穿过混乱的公用网络的安全、稳定的通道。IPSec（Internet 协议安全）很好的解决了网络的安全问题，它是1个标准网络安全协议，为IP网络通信提供透明的安全服务，保护TCP/IP通信免遭窃听和篡改，可以有效的抵御网络上的攻击，同时保持易用性。

本设计主要研究中小型企业Intranet及VPN技术的应用。首先对中小型企业做安全分析，概述了中小型企业网络安全现状和前景，然后对VPN的背景，工作原理，分类，关键协议，安全机制和隧道协议等做具体的研究，最后构建1个具体的IPsec VPN网络，画出网络拓扑图并做出具体的配置。

关键字：Intranet；安全；IPSec；VPN
 
Building Intranet for Middle-Small Company and Research for VPN Technology

Abstrzct: IP network security has been a grossly areas of concern, if a certain lack of security, whether public or enterprise networks dedicated networks are vulnerable to Hackers attacks and the illegal invasion. For a particular enterprise internal network creation, network attacks are likely to come from the internal network may come from the Internet or external controllers. The results may lead to the security of the enterprises internal network is to speak of. By password access control to ensure data security in the network transmission process. And IPSec (Internet security agreement) is a solution to these problems. VPN is defined as the public net cespecially the internet by setting up a temporary and secure connect, and also a safe drannel goes through the disorder public network. IPSec (Internet security agreement) is a good solution to the network security issues.IPsec has provided one kind standard，Vigorous and healthy as well as containing widespread mechanism, available it is I P and the upper formation agreement (for example UDP and TCP) provides the safe guarantee. It has defined the algorithm which a set tacitly approves, forces to implement, guarantees the different implementation plan to be possible to be common mutually.

    The design main building intranet for middle-small company and research for VPN technology. First of all ,I make a safety analysis for middle-small company and outlines the middle-small network security status and prospects, and then the background of VPN, principles, classification, the key agreements, security mechanisms and agreements communities do specific research, and finally building a specific IPsec VPN networks, network topography painted and made specific configuration.

Key words: Intranet; Security; IPsec; VPN

注释：不含源代码