In short, several sites in CF are returning error 522 or 524 but only on one ISP (Altice in Dominican Republic), I have tested sites on 3 different accounts, including the one on the above link, and at least 2 different hosting providers (Inmotion Hosting and Godaddy). If I bypass CF or connect from a different ISP, everything works correctly.
While it looks like an issue with the ISP, I don’t know what to tell them in order to troubleshoot the issue, or if the problem is on CF side.
Hi, I found the issue with my sites, tested with sites on a friends account, all returned the same error on this ISP only, if opened on a different ISP they work correctly. That’s the reason I don’t think it’s related to the hosting company.
I will review the tutorials you linked and see if those tips can help.