OpenVPN is a Virtual Private Networking (VPN) solution provided in the Ubuntu Repositories.

Installation

$ sudo apt-get install openvpn network-manager-openvpn

you slao can install

$ sudo apt-get install network-manager-pptp  (for Microsoft VPN)

$ sudo apt-get install network-manager-vpnc  (for Cisco VPN)

Add a VPN Connection

Click network icon from system tray, go [VPN Connetions] –> [Configure VPN...] –> [VPN], the [Add] button is enabled, you can create a connection there by select the connection type.