On this instruction, we use Windows 7 screens. Windows XP and Windows 8 are similar, however there are a little number of changes.
1. Initial configurations (only once at the first time)
Right-click the network icon on the bottom-right side of Windows screen, and click "Open Network and Sharing Center" .
Click "Set up a new connection or network" on the "Network Sharing Center" .
Select "Connect to a workplace" .
Select "Use my Internet connection (VPN)" .
After you paste the "Internet address" , check "Don't connect now; just set up so I can connect later" checkbox on the bottom of the screen surely.
If the username and password prompting screen appears, input "vpn" (3-letters) on both username and password field. You should check "Remember this password" .
When "The connection is ready to use" message appears, click the "Close" button. Do not click the "Connect now" button.
Go to "Network and Sharing Center" and click "Change adapter settings" .
The currently defined VPN connection settings are listed. Right click the icon you created in the previous step, and click "Properties" .
On the Properties screen, switch to the "Security" tab. (In Windows XP, switch to the "Network" tab.) Choose "Layer 2 Tunneling Protocol with IPsec (L2TP/IPSec)" on the "Type of VPN" drop-down list.
Next, click the "Advanced settings" button. (In Windows XP, click the "IPsec Settings" on the "Security" tab.)
The following screen will appear. Click "Use preshared key for authentication" and input "vpn" (3-letters) on the "Key" field.
After the above configuration finished, click the "OK" button twice to close the property screen of the VPN connection setting.
2. Connect to the VPN Server
Double-click the created VPN connection setting, the below screen will appear.
"User name" and "Password" fields should be filled automatically if you enable password-saving options in previous steps. If not, input "vpn" on both "User name" and "Password" fields.
Click the "Connect" button to start the VPN connecting attempts.
While the VPN is trying to be established, the following screen displays statuses. If an error occurs, confirm your settings make sure that the type of VPN is "L2TP/IPsec" , and the pre-shared key is correctly specified.
If the VPN connection is successfully established, a VPN connection icon will be listed on the screen which appears when you click the network icon on the bottom-right of Windows screen. The status of the VPN connection icon should be "Connected" .
By the way, you can initiate the VPN connection by simply clicking this VPN icon from now on.
3. Enjoy Internet via VPN relaying
While VPN is established, all communications towards the Internet will be relayed via the VPN Server. You can verify that by using "tracert 8.8.8.8" command on the Windows Command Prompt.
Enjoy YouTube, Facebook or Twitter while your VPN connection is established.
Facebook, Twitter and Gmail uses HTTPS (SSL) encrypted communication protocols. Regardless of VPN or non-VPN, no one can tap these encrypted communications.