You can check my previous discussions for this for making a vuntability signature that will block Application level DDOS or Brute force on a login page:
Also I made a post for making custom App id that matches the referer origin HTTP header and in this way the traffic for a website main page that refers to many other pages will be allowed without the need to allow all 30 or even 50 sub-sites seperatly,
Click Accept as Solution to acknowledge that the answer to your question has been provided.
The button appears next to the replies on topics you’ve started. The member who gave the solution and all future visitors to this topic will appreciate it!
These simple actions take just seconds of your time, but go a long way in showing appreciation for community members and the LIVEcommunity as a whole!
The LIVEcommunity thanks you for your participation!