As PPTP is easy to set and its connection speed is comparatively fast, PPTP is a recommendable way of VPN connection. However, it cannot be connected at some spots of Wi-Fi. In such case, try to use L2PT/IPSec. Here is explanation of the way to make VPN connection of PPTP by windows8.1.
Click “Control Panel” → ”Network and Internet“
Click “Set up a new connection or network”
Select “Connect to a workplace” and click “Next”.
Select “No, create a new connection” and click “Next”.
Click “Use my Internet connection (VPN)”.
“Input of log-in information of VPN server”
Refer to the log-in information set by CUP.COM.
Input ③VPN server IP address in “Internet address”.
Input a name whatever you like in “Destination name”. (Example: “CUP.COM VPN”)
Click “Create” button.
”Connection to VPN server”
The VPN server made in the network charm is shown.
Click the VPN server shown.
Input your ①user name.
Input your ②password.
Click “OK” button.
In case the charm is hidden, click the bellow on desktop of your PC. Then, the charm is shown.
It turns to be sign of connecting.
It takes a little time in the first connection.
The connection is completed.