This seems to be a recent change on Cloudflare's checks as I was able to access pages behind Cloudflare yesterday. It's not an IP block as I tested it from IPv4 and two IPv6 subnets (HE.net tunnel and ISP native.)
Example site affected by this issue: https://dodi-repacks.site/
The lines below are all that showed up in the browser console:
Code: Select all
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://tls-ech-experiment-c.cloudflareresearch.com/.well-known/probe. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).
(unknown)
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://tls-ech-experiment.cloudflareresearch.com/.well-known/probe. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).
(unknown)
Security Error: Content at https://dodi-repacks.site/ may not load data from https://lkvb3h.cloudflarecaptcha.com/.
Security Error: Content at https://dodi-repacks.site/ may not load data from https://gdl3wg.cloudflarecaptcha.com/.