OpenVPN ubuntu
From BTGuard Wiki
8. Enter the following information:
Gateway: vpn.btguard.com
Optional: To manually select your server location, please use ca.vpn.btguard.com for Canada or eu.vpn.btguard.com for Europe or sg.vpn.btguard.com for Singapore.
Username:
Password: Enter your password.
9. Click on the icon next to CA Certificate and locate the file btguard.ca.crt downloaded previously.
10. Click on the Advanced... button.