How can I ensure that Cloudflare traffic comes from my cloudflare zone?

Describe the issue you are having:
I configured my http load balancer in one of major clouds while DNS zone is managed by Cloudflare.
How can I be ensured that Cloudflare traffic comes from my proxied DNS, but not another Cloudflare users except using mTLS as it’s quite hard to automate?
Are there some zone specific http headers that could be added to requests? I see that there is CF-Connecting-IP that could be used in conjunction with allowlisted Cloudflare IPs but we cannot put 4k IPs in match rules in http load balancer, unfortunately.
Maybe there are other options that I have to take a look?

This topic was automatically closed 15 days after the last reply. New replies are no longer allowed.