How to stop ddosing a file that is no longer on the server?

Question

DDoS Protection

Found a hole in the site. The whole day was addressed to one specific file. I deleted it, and calls still come from different IPs. What can be done to stop this?

Answer 1

If your site crashes from a link to a specific file, then there are two options, either in this file there is a direct access (read / write) to the database, or if the file is simple and the site crashes from the load, then Facebook itself probably ddos ​​you, and even clogs the channel to the server with simple calls;)
The solution to the problem should be adequate, if the file cannot be deleted, and give a 404 error, then you need to cache all the data that is returned.
Read about memcache and redis.