Bad Actors using my IP in their DNS

I can see that some domains are using my IP in their DNS records using nameservers that are maintained by Cloudflare:

My domain has proxy routing behind Cloudflare but im still getting some weird traffic from:

which somehow points directly to my server IP - how to deal with that ? Is there anyone authoritative here ? Only i have an access to the IP in question.

Thank you in advance

Welcome to the Cloudflare Community. :logodrop:

If you do not use Cloudflare, you can easily block inappropriately routed traffic by adding Cloudflare proxy IPs to your host’s firewall.

If your site uses Cloudflare, the process is a little more involved. You would start by firewalling all but Cloudflare proxy IPs and you would then need to add Authenticated Origin Pulls using your own private certificate authority.

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