title: How to prevent automated request to the server?
body: <p>How to prevent automated request? This is not a duplicate question. The existing answers are not compromised. </p>
  
  <p>What if an attacker using a program which make 1 Million requests per minute? Or the program may use various proxy or vpn and can request millions of request to the server. The server will slow down due to the heavy load. How can this be prevented?</p>
  
  <p>Can IP Tables handle millions of request per second?</p>