You can use OpenVPN in iOS.
Please search openvpn from AppStore and install ”OpenVPN Connect”.
Please tap one of next links.
Please tap Open in ”OpenVPN”.
Please tap +.
Input Username and Password, turn on switches.
Refer to the log-in information on Cup.com setting log-in.
Please tap OK.
Finished setting and connecting.
If you can not connect , try another setting file.