I’ve read other posts about this, but nothing that helps my situation. I have a client’s site that is a revenue-generating site and cannot go down. However, after comparing all of the DNS records in CLoudFlare to the records at the web host and verifying they’re the same, I changed the Name Servers at the Registrar to point to CloudFlare. The site immediately went down and I needed to revert the Name Servers back to their original.
I then decided to take a testing website and create a CloudFlare account and went through the same process and everything went as it should. The test site did not go down. The only difference I can identify between the two sites, is the client site is on a VPN and in CloudFlare I do not see the IP address of the VPN server listed anywhere. Other than this, all other DNS records are a dead match.