Connect an OpenVPN server using IOS/Android/Linux/Windows client.

When you have your open VPN configuration file. "youname.ovpn" All you have to do is configure this file in your local device using any VPN client tool.

VPN Client tools.

1. For MacBook (You can download tunnel blink and configure) from below link.

https://tunnelblick.net/

      2. For Android (Download Open VPN client from Play store)

https://play.google.com/store/apps/details?id=net.openvpn.openvpn&hl=en

      3. For IOS (Download Open VPN client from App store)

https://apps.apple.com/us/app/openvpn-connect/id590379981

When you have your VPN certificate file, all you have to do is configure the certificate. just add the certificate in the client tool and try to connect VPN.

Tunnel Blick screenshot.

Just drag and drop your certificate file in the configuration section and connect.