Greetings, I am sorry to hear that, but unfortunately there were some topics before regarding people having some errors or issues with eZoic and Cloudflare integration.
This seems to me as, may I ask, is your domain currently using Cloudflare?
If yes, unfortunately I haven’t encountered the same issue as they stated.
Regarding DDoS Protection which is blocking the request, I really cannot figure it out what is going on.
Maybe the ads cannot be shown at your Website?
Is their dashboard saying anything else?
Interestingly.
If so, well we can do a re-check to try to troubleshoot if anything from below could be the reason why did you got this issue:
- Have you got an “
I am Under an Attack!” mode enabled for your domain at Cloudflare dashboard? - Have you got some Firewall Rules setup and enabled?
Therefore, regarding eZoic integration through their dashboard (interface), have you re-checked, as far as I remember, they asked you to provide either your’s Cloudflare credentials, or, it could be they have updated something, and they are asking for Cloudflare Global API key?
Furthermore, have you already followed the articles below?:
There are two ways as I remember:
- Going with Cloudflare integration and having Cloudflare nameservers
- Changing domain nameservers to eZoic ones and then using their interface to apply all and any changes regarding the Cloudflare dashboard
Further more, upon successfull integration, just to take a note here as any changes you would want to make for your domain, you would have to do it through their eZoic interface.
Otherwise, if you change something at Cloudflare dashboard, but not through the eZoic interface, it will be reverted back to originals (there were few topics about where people have had changed or added a new or existing DNS record and it was removed somehow without a notice).
Maybe some other helpful topic about eZoic here at Cloudflare Community using 
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