To connect to the UNH-IOL openvpn server, you must download the vpn file attached to your booking email. You will also need to have an openvpn client installed on your machine (most Linux distributions ship with this by default).
For the most consistent results we highly recommend using a dedicated network manager. In Ubuntu this can be found in Settings > Network and from there add a new vpn using import from file. Upload the .ovpn attached in your booking email and then enter the username and password and click add. After this is done you will need to use follow the directions provided in your booking email to change your password.