How do I know when something has been blocked as DDoS and under what conditions is it blocked?

The DDoS policy acts in the two situations below:

1. Too many connections/requests in a page
   Resources contribute to the total number of connections/requests. The 503 error page will show up in this case. Connection and request limits can be set in the console DDoS settings (Settings>DDoS).
2. Blocked by internal DDoS policies
   When blocked by internal DDoS policies, specific IPs deemed suspicious or abnormal will be blocked for 5 minutes and when they try to access the web server there will be an error page saying the page cannot be accessed. If you wish to whitelist specific IPs that are blocked in this case, please contact Cloudbric by submitting a ticket here.