How to configure VPN connection?

Ubuntu
  1. Make sure you have network-manager-pptp and pptp-linux installed.
  2. Click the Network Connection icon, and click the Configure VPN... menu.
  3. Click the VPN tab, and click the Add button.
  4. Select Point-to-Point Tunneling Protocol (PPTP), and click the Create... button.
  5. In the Connection name box, type the connection name.
  6. In the Gateway box, type the host name or IP address of the proxy.
  7. In the User name box, type the user name to connect to the proxy.
  8. Click the Advanced... button.
  9. Under the Authentication, click the Use Point-to-Point encryption (MPPE) check box.
  10. Click OK button to close the Advanced... window.
  11. Click Apply button to save the settings.
How to configure VPN connection?