title: How to check VPN Connectivity in iPhone
body: <p>I am new to this development.
  I searched a lot over Internet but cant find any proper solution for it.
  I want to check VPN connectivity available in my iPhone application as I am fetching data from client machine which is connected through VPN.
  I did check if Internet connection is available but unable to check if VPN is connected or not.
  Please suggest me on this.</p>