The first step on GNU / linux click edit connection
After you click edit connection a popup will appear as shown above and click add
And in this third step you make sure you have chosen the PPTP (Point to point tunneling protocol) VPN protocol
Then in the gateway column, type the server ip address that has been given, along with the username and password and click the advanced button.
And in the next step you make sure to just check the list according to the picture above and klik ok button.
In accordance with the image above, click VPN Connection and click usevpn (the VPN name that you added earlier).
Congratulations on successfully using one of the best VPN protocols that is very easy to use.