openvpn

OpenVPN provides multiple authentication methods”
>Authentication methods are used to verify the identities of both parties in a connection, including:

• Pre-shared key
• Third-party certificate
• Username/password combination

A pre-shared key is the simplest option, but it can only be used to create a point-to-point VPN; PKI-based third-party certificates provide the most complete functionality, but require the additional maintenance of a PKI certificate system. After OpenVPN 2.0, a username/password combination authentication method was introduced. It can omit client certificates, but it still requires a server certificate for encryption.

openvpn

Usage video

One-click server setup script

wget https://raw.githubusercontent.com/wggwcn/centos7-shadowsock/master/openvpn.sh && chmod +x openvpn.sh && bash openvpn.sh