To prevent attacks on customers' websites, we integrated IIS IP Address and Domain Restrictions into the Hosting Control Panel. Thus, each customer can block mass bad requests easily without knowing the specific IP addresses.
Go to Control Panel ---> Websites ---> Manage website ---> IP deny, you will see below options.
It is an option that has been there for years, it can help to block specific IP or IP ranges.
For more detail about this function, Please refer to Here.
Deny IP Address based on the number of concurrent requests:
Denies requests from an IP address when the number of concurrent requests exceeds the specified Maximum number of concurrent requests.
Deny IP based on the number of requests over a period of time:
Denies requests from an IP address when the number of requests exceeds the specified Maximum number of requests for a given Time Period (in milliseconds).