I have checked the error logs for your domain on Cloudflare for the last 24 hours, and I can see that 522 errors are occurring, which means we are unable to connect to your origin.
I have run repeated TCP connection tests to the location where we saw the errors.
What is interesting here is that the IPs that fail are consistent each time. For your reference, here are the top IPs of ours that experienced these errors in the last 24H:
172.64.238.145
172.64.238.144
172.68.134.154
172.68.134.155
This is a clear indication that some of the IPs in Cloudflare’s IP ranges are either being rate-limited or blocked by a network device at your hosting provider. Because Cloudflare operates as a reverse proxy, the IP address your server will see is one of a limited number of Cloudflare IPs. In that sense, many actual visitors may all come from the same IP address, which can cause firewalls or security software that is not appropriately allowlisting the Cloudflare IP ranges to block this traffic as it may see it as excessive or malicious. We publish a full list of our IP ranges here so that you can allowlist:
I would make sure that your hosting provider confirms that the Cloudflare IP ranges listed in the URL above are fully allowlisted from any security software, firewall, etc., to ensure there is no rate limiting or blocking of our edge servers.
This should ensure that Cloudflare can consistently make a connection to your origin server to retrieve content and serve it to your visitors.