Protection against ddos ​​using standard ISP control panel tools?

Question

DDoS Protection

In the ISP manager panel , in the WWW domains tab (when selecting a domain), there is an option Enable DDoS protection (Enable DDoS protection using nginx mod_limit_req). When DDoS protection is enabled, any IP address will be blocked. The IP address is blocked for 5 minutes on all ports. This option is ddos ​​protection for a specific site (of which there may be many on the server).
When this option is enabled, the parameters that need to be filled in appear:

• Number of requests per second from one IP address
  
• Max splash size
  

Can you please tell me the most optimal values ​​for the number of requests and the size of the burst? The values ​​must be convincing so that it does not accidentally work on visitors, but only if a ddos ​​attack has probably started.
DDoS protection

Answer 1

This is set depending on the site.
Hire an admin, because different pages of the site need different limits. This is not done all under one brush.

Answer 2

Nevertheless, there are minimum values ​​for these settings so as not to slow down search engine robots. If anyone knows, please write. If you do not know, do not write: "ask someone who knows"))) or search the Internet. This topic comes up first in a search, so it's logical for a reasonable answer to be here.