1 :
First, click on "dash home" and then search for and run the terminal. (For shortcut key, press CTRL+ALT+T)
2 :
Run the command:
$sudo apt-get install openswan xl2tpd
3 :
Select "No" if the program requires to install the certificate.
4 :
Then add the L2TP/IPSec application repository.
Run: $sudo apt-add-repository ppa:werner-jaeger/ppa-werner-vpn
5 :
Next, update the repositories and install the l2tp-ipsec-vpn application:
$sudo apt-get update
$sudo apt-get install l2tp-ipsec-vpn
6 :
Choose yes if the confirmation prompt.
7 :
Click on "Dash home", run the "L2TP Ipsec VPN Applet".
This will create an icon on your top panel with two computers. Click on that icon and choose "Edit Connections...". Provide your Ubuntu user password and click "OK".
8 : The "VPN Connections" window will appear.
Click the "Add..." button.
Enter the desired "Connection name" (like FrootVPN) and click "OK".
9 : The connection is now created. Select it and click "Edit...".
Select the "IPsec" tab.
At the "Remote Server" enter us-la.frootvpn.com
and for the "pre-shared key for authentication" is frootvpnsecret
10 :
Now choose the "PPP" tab.
Select "Allow these protocols", see the image below for the configuration
Enter "User name" and "Password". The username and password was sent to you in your VPN service activation email. Click the "disable IPSEC Encryption" box.
Click IP settings button.
11 :
Make sure that the box unchecked
12 :
Click on connection icon in the top corner to manage your connection -connect and disconnect.
13 :
Wait for the confirmation if the connection is success.