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介绍虚拟专用网络VPN的基本概念,以及如何安装配置虚拟专用网络VPN。指出用户通过VPN远程访问服务器的客户机和服务器两边都必须连接到Internet,并且服务器的连接是专用网络。
Describes the basic concepts of Virtual Private Network VPN and how to install and configure Virtual Private Network VPN. Point out that users must have Internet access to both the client and server on both sides of the server through VPN remote access and that the server’s connection is private.