404 Errors Looks Suspicious: What To Do..?

When I check my sites 404 errors today, I see some other site redirected to my site…
When I check it on browser it says

Your connection is not private

Attackers might be trying to steal your information
This server could not prove that it is its security certificate
This may be caused by a misconfiguration or an attacker intercepting your connection.
When I Proceed to unsafe link on the browser…

it is redirecting to my site…
What is this exactly… Is it from competitors who are trying to redirect spam sites to my site by seeing the IP address…
What should i do… Do I need to use cloudflare…?

Are you using Apache or NGINX?

Can you enable Authorised Origin Pull via Cloudflare? That will fix.

NGINX server… ip is visible … ! DNS only… not proxied

I have one question… Does they use my IP to redirect spam domains… or it is possible without knowing my site ip also…

Proxying record (hiding IP) doesn’t help in this case.

I think previous instance owner had same IP. They forgot to remove/update that instance IP at their domain. To get new IP, you can clone server.

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