How to block an IP from access my sites?

Hello,

I have this unknown person, who tried to attack my site all the time, but the good thing is, he/she only uses one IP to attack me. He's obviously a competitor.

I notice my site is being attacked once a day, but each day a different single IP address.

Anyway, is there a way to use CWP to block an IP automatically when the request is too much in a second?

How exactly do we block an IP manually if there is no automatic way?

This person is sending request to my site, at the rate of 1000 request per second on my site, which is already busy, causing my site to load slow and sometimes it gets a timeout error.

I can see the thousands of request each second on my cloudflare. Cloudflare offer a feature called "rate limiting" which blocks IP if an IP address request too many at a time, but this cost money.

I am looking for a way to do this using CWP for free.

you can do it in csf check tons of documentation online