IP分组网络安全分析及IPSec技术

由于Internet协议（IP）技术应用灵活，构网相关的软硬件资源丰富，基于IP技术的网络逐步成为各类公众通信网络、专用通信网络的主体。同时IP技术的开放性也使该种网络的安全威胁更严峻。通过分析安全威胁，介绍网络协议安全（IPSec）的安全作用机制，可知IPSec可在多种网络威胁环境下保护数据分组；进而分析IPSec技术在网络安全中的应用，给出IPSec构造安全虚拟网（VPN）的结构。

Analysis on IP Packet Network Security and IPSec Technology

Intemet Protocol （IP） technology is flexible on applications, and resource is abundant no matter on hardware or software, NET based on IP becomes mainstream in the whole bag of netware. Whereas security is bad because IP is open to the others. This paper analyzes the threats and introduces Internet Protocol Security （IPSec） mechanism. IPSec can protect data packet in multiple network threat environments. And then it analyzes the application of IPSec technology in network security and presents the structure of secure virtual private network （VPN） constructed by IPSec.