IPSec是一系列基于IP网络(包括Intranet、Extranet和Internet),由IETF正式定制的开放性IP安全标准,是虚拟专用网的基础。IPSec可以保证局域网、专用或公用的广域网及Internet上信息传输的安全。为了保证Internet上各分支办公点的安全连接,公司可以借助Internet或公用的广域网搭建安全的虚拟专用网络。这使得公司可以不必耗巨资去建立自己的专用网络,而只需依托Internet即可以获得同样的效果。在计算机上装有IPSec的终端用户可以通过拨入所在地的ISP的方式获得对公司网络的安全访问权,从而保证Internet上远程访问的安全。这一做法降低了流动办公雇员及远距离工作者的长途电话费用。IPSec还可以通过认证 IPSec is a series of open IP security standards based on IP networks (including Intranet, Extranet and Internet), formally customized by the IETF, and is the foundation of the virtual private network. IPSec can guarantee LAN, private or public WAN and Internet information transmission security. In order to ensure the safety of the branch office on the Internet connection, companies can use the Internet or public WAN to build a secure virtual private network. This allows companies to spend their money without having to build their own private network, but only rely on the Internet to get the same effect. End-users with IPSec on their computers can gain secure access to corporate networks by dialing in to their local ISP, ensuring the security of remote access over the Internet. This approach reduces long-distance telephone charges for mobile office workers and long-distance workers. IPSec can also be certified