如何在CentOS VPS上配置VPN？实用指南

随着互联网的快速发展，VPN（虚拟专用网络）已成为保障网络安全和隐私的重要工具，无论是企业还是个人，使用VPN都可以有效防止数据泄露、提升网络速度，甚至可以访问受限的互联网内容，本文将详细 guide 您如何在CentOS VPS上配置VPN,帮助您轻松实现安全可靠的上网体验。

什么是VPN？

VPN，全称Virtual Private Network，虚拟专用网络，是一种网络技术，允许用户通过加密的隧道连接到远程服务器，从而模拟一个私人的局域网，无论您身处何地，只要连接到VPN服务器,即可访问国内外的互联网服务。

安装VPN软件

要配置VPN，首先需要安装一个可靠的VPN客户端和服务器软件,以下是常用的VPN软件及其安装方法：

OpenVPN

OpenVPN 是一款功能强大的VPN软件，支持多种协议（如IPsec、OpenVPN PPTP、OpenVPN隧道等），兼容性也很好，适用于CentOS VPS。

安装步骤：

1. 打开终端，输入以下命令下载OpenVPN：

   curl -fsSL https://download.opendaylight.org/openvpn/ | sudo -E bash -

2. 安装完成后，运行：

   sudo ./opvundefault

3. 配置完成后，运行：

   sudo ./opvns

   这将创建默认的OpenVPN服务器。

NordVPN

如果您更喜欢图形界面，可以考虑使用NordVPN，不过NordVPN不支持CentOS VPS,因此OpenVPN是更适合的选择。

配置OpenVPN服务器

OpenVPN默认会创建一个名为OpenVPN的服务器,您需要配置它连接到互联网。

配置步骤：

1. 打开终端，输入以下命令创建一个配置文件：

   sudo nano /etc/opvundefault.conf

2. 在编辑器中输入以下内容，保存并退出：

   [global]
   version=2
   protocol=0
   [ervers]
   type=peers
   address=127.0.0.1:3000
   [peers]
   type=pub
   address=127.0.0.1:3001
   [ clients ]
   type=pub
   address=127.0.0.1:3002
   [peers]
   type=sub
   address=127.0.0.1:3003
   [ clients ]
   type=sub
   address=127.0.0.1:3004
   [peers]
   type=sub
   address=127.0.0.1:3005
   [ clients ]
   type=sub
   address=127.0.0.1:3006
   [peers]
   type=sub
   address=127.0.0.1:3007
   [ clients ]
   type=sub
   address=127.0.0.1:3008
   [peers]
   type=sub
   address=127.0.0.1:3009
   [ clients ]
   type=sub
   address=127.0.0.1:3010
   [peers]
   type=sub
   address=127.0.0.1:3011
   [ clients ]
   type=sub
   address=127.0.0.1:3012
   [peers]
   type=sub
   address=127.0.0.1:3013
   [ clients ]
   type=sub
   address=127.0.0.1:3014
   [peers]
   type=sub
   address=127.0.0.1:3015
   [ clients ]
   type=sub
   address=127.0.0.1:3016
   [peers]
   type=sub
   address=127.0.0.1:3017
   [ clients ]
   type=sub
   address=127.0.0.1:3018
   [peers]
   type=sub
   address=127.0.0.1:3019
   [ clients ]
   type=sub
   address=127.0.0.1:3020
   [peers]
   type=sub
   address=127.0.0.1:3021
   [ clients ]
   type=sub
   address=127.0.0.1:3022
   [peers]
   type=sub
   address=127.0.0.1:3023
   [ clients ]
   type=sub
   address=127.0.0.1:3024
   [peers]
   type=sub
   address=127.0.0.1:3025
   [ clients ]
   type=sub
   address=127.0.0.1:3026
   [peers]
   type=sub
   address=127.0.0.1:3027
   [ clients ]
   type=sub
   address=127.0.0.1:3028
   [peers]
   type=sub
   address=127.0.0.1:3029
   [ clients ]
   type=sub
   address=127.0.0.1:3030
   [peers]
   type=sub
   address=127.0.0.1:3031
   [ clients ]
   type=sub
   address=127.0.0.1:3032
   [peers]
   type=sub
   address=127.0.0.1:3033
   [ clients ]
   type=sub
   address=127.0.0.1:3034
   [peers]
   type=sub
   address=127.0.0.1:3035
   [ clients ]
   type=sub
   address=127.0.0.1:3036
   [peers]
   type=sub
   address=127.0.0.1:3037
   [ clients ]
   type=sub
   address=127.0.0.1:3038
   [peers]
   type=sub
   address=127.0.0.1:3039
   [ clients ]
   type=sub
   address=127.0.0.1:3040
   [peers]
   type=sub
   address=127.0.0.1:3041
   [ clients ]
   type=sub
   address=127.0.0.1:3042
   [peers]
   type=sub
   address=127.0.0.1:3043
   [ clients ]
   type=sub
   address=127.0.0.1:3044
   [peers]
   type=sub
   address=127.0.0.1:3045
   [ clients ]
   type=sub
   address=127.0.0.1:3046
   [peers]
   type=sub
   address=127.0.0.1:3047
   [ clients ]
   type=sub
   address=127.0.0.1:3048
   [peers]
   type=sub
   address=127.0.0.1:3049
   [ clients ]
   type=sub
   address=127.0.0.1:3050
   [peers]
   type=sub
   address=127.0.0.1:3051
   [ clients ]
   type=sub
   address=127.0.0.1:3052
   [peers]
   type=sub
   address=127.0.0.1:3053
   [ clients ]
   type=sub
   address=127.0.0.1:3054
   [peers]
   type=sub
   address=127.0.0.1:3055
   [ clients ]
   type=sub
   address=127.0.0.1:3056
   [peers]
   type=sub
   address=127.0.0.1:3057
   [ clients ]
   type=sub
   address=127.0.0.1:3058
   [peers]
   type=sub
   address=127.0.0.1:3059
   [ clients ]
   type=sub
   address=127.0.0.1:3060
   [peers]
   type=sub
   address=127.0.0.1:3061
   [ clients ]
   type=sub
   address=127.0.0.1:3062
   [peers]
   type=sub
   address=127.0.0.1:3063
   [ clients ]
   type=sub
   address=127.0.0.1:3064
   [peers]
   type=sub
   address=127.0.0.1:3065
   [ clients ]
   type=sub
   address=127.0.0.1:3066
   [peers]
   type=sub
   address=127.0.0.1:3067
   [ clients ]
   type=sub
   address=127.0.0.1:3068
   [peers]
   type=sub
   address=127.0.0.1:3069
   [ clients ]
   type=sub
   address=127.0.0.1:3070
   [peers]
   type=sub
   address=127.0.0.1:3071
   [ clients ]
   type=sub
   address=127.0.0.1:3072
   [peers]
   type=sub
   address=127.0.0.1:3073
   [ clients ]
   type=sub
   address=127.0.0.1:3074
   [peers]
   type=sub
   address=127.0.0.1:3075
   [ clients ]
   type=sub
   address=127.0.0.1:3076
   [peers]
   type=sub
   address=127.0.0.1:3077
   [ clients ]
   type=sub
   address=127.0.0.1:3078
   [peers]
   type=sub
   address=127.0.0.1:3079
   [ clients ]
   type=sub
   address=127.0.0.1:3080
   [peers]
   type=sub
   address=127.0.0.1:3081
   [ clients ]
   type=sub
   address=127.0.0.1:3082
   [peers]
   type=sub
   address=127.0.0.1:3083
   [ clients ]
   type=sub
   address=127.0.0.1:3084
   [peers]
   type=sub
   address=127.0.0.1:3085
   [ clients ]
   type=sub
   address=127.0.0.1:3086
   [peers]
   type=sub
   address=127.0.0.1:3087
   [ clients ]
   type=sub
   address=127.0.0.1:3088
   [peers]
   type=sub
   address=127.0.0.1:3089
   [ clients ]
   type=sub
   address=127.0.0.1:3090
   [peers]
   type=sub
   address=127.0.0.1:3091
   [ clients ]
   type=sub
   address=127.0.0.1:3092
   [peers]
   type=sub
   address=127.0.0.1:3093
   [ clients ]
   type=sub
   address=127.0.0.1:3094
   [peers]
   type=sub
   address=127.0.0.1:3095
   [ clients ]
   type=sub
   address=127.0.0.1:3096
   [peers]
   type=sub
   address=127.0.0.1:3097
   [ clients ]
   type=sub
   address=127.0.0.1:3098
   [peers]
   type=sub
   address=127.0.0.1:3099
   [ clients ]
   type=sub
   address=127.0.0.1:3100
   [peers]
   type=sub
   address=127.0.0.1:3101
   [ clients ]
   type=sub
   address=127.0.0.1:3102
   [peers]
   type=sub
   address=127.0.0.1:3103
   [ clients ]
   type=sub
   address=127.0.0.1:3104
   [peers]
   type=sub
   address=127.0.0.1:3105
   [ clients ]
   type=sub
   address=127.0.0.1:3106
   [peers]
   type=sub
   address=127.0.0.1:3107
   [ clients ]
   type=sub
   address=127.0.0.1:3108
   [peers]
   type=sub
   address=127.0.0.1:3109
   [ clients ]
   type=sub
   address=127.0.0.1:3110
   [peers]
   type=sub
   address=127.0.0.1:3111
   [ clients ]
   type=sub
   address=127.0.0.1:3112
   [peers]
   type=sub
   address=127.0.0.1:3113
   [ clients ]
   type=sub
   address=127.0.0.1:3114
   [peers]
   type=sub
   address=127.0.0.1:3115
   [ clients ]
   type=sub
   address=127.0.0.1:3116
   [peers]
   type=sub
   address=127.0.0.1:3117
   [ clients ]
   type=sub
   address=127.0.0.1:3118
   [peers]
   type=sub
   address=127.0.0.1:3119
   [ clients ]
   type=sub
   address=127.0.0.1:3120
   [peers]
   type=sub
   address=127.0.0.1:3121
   [ clients ]
   type=sub
   address=127.0.0.1:3122
   [peers]
   type=sub
   address=127.0.0.1:3123
   [ clients ]
   type=sub
   address=127.0.0.1:3124
   [peers]
   type=sub
   address=127.0.0.1:3125
   [ clients ]
   type=sub
   address=127.0.0.1:3126
   [peers]
   type=sub
   address=127.0.0.1:3127
   [ clients ]
   type=sub
   address=127.0.0.1:3128
   [peers]
   type=sub
   address=127.0.0.1:3129
   [ clients ]
   type=sub
   address=127.0.0.1:3130
   [peers]
   type=sub
   address=127.0.0.1:3131
   [ clients ]
   type=sub
   address=127.0.0.1:3132
   [peers]
   type=sub
   address=127.0.0.1:3133
   [ clients ]
   type=sub
   address=127.0.0.1:3134
   [peers]
   type=sub
   address=127.0.0.1:3135
   [ clients ]
   type=sub
   address=127.0.0.