Error 1020 or Error 521

hello please hellp
When you click on one of the following links,
it will take you to the cloudflare page . Error 1020

How can I activate this same feature on one of my domains? this my domain

That’s a Firewall Rule to Block based on the matching criteria you set in the rule.

How do I do it What do I do How do I get started and is it needed
Is there config A certain

Here’s the criteria you can use. It also has links to more Firewall Rules documentation.

thank you for reply but please check image

I want to protect my domain
Like these domains

When you click on any of them it will give you an error
Error 1020 or Error 521

I want my domain to be like it , Gives this error
my domain ,

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