OpenVPN ubuntu
From BTGuard Wiki
5. Download the BTGuard CA certificate btguard.ca.crt
6. Click on the Network icon in the top right corner and go to VPN Connections > Configure VPN....
9. 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.
Both username and password are case sensitive. Make sure not to add/forget Capital Letters.
10. Click on the icon next to CA Certificate and locate the file btguard.ca.crt downloaded previously.
11. Click on the Advanced... button.