移动IP技术在VPN中的应用

Application of Mobile IP in VPN

虚拟专用网络VPN(Virtual Private Networks)是实现在公网上安全传输私有网络信息的一种技术。作为VPN的关键技术之一的隧道技术解决了移动节点的移动性问题。在介绍L2TP与IPSec这2种VPN隧道机制的基础上对它们进行了比较,重点介绍了IPSec在安全性方面的优势,然后介绍了VPN移动用户的问题和VPN的2种隧道模型,最后分析了利用移动IP技术解决VPN中的移动用户问题的优点,并与现有方案VPDN(Virtual Private Dial-up Network)作了比较。

VPN is a technology that realizes the security transmission of private information through the public network. As one of key technologies, tunnel technology resolves the mobility problem of mobile nodes. Firstly, L2TP and IPSec have been compared based on these two tunnel principles introduction of VPN. Secondly the advantages of IPSec in security have been introduced. Then, the problems of mobile host and two models of tunnel in VPN have been introduced. Lastly, the advantages of utilizing the mobile IP to resolve the problem of mobile host have been analyzed, and this technology has been compared with VPDN.