Dear sir, [cloonan]!
- (Most common cause) Cloudflare IP addresses are rate limited or blocked in .htaccess, iptables, or firewalls. Confirm your hosting provider whitelists Cloudflare IP addresses
Сhecked, ip is not in the blacklist
- An overloaded or offline origin web server drops incoming requests.
Сhecked, origin web server not overloaded
Сhecked, keepalives not disabled at the origin web server
- The origin IP address in your Cloudflare DNS app does not match the IP address currently provisioned to your origin web server by your hosting provider.
Сhecked, origin IP address in my Cloudflare DNS application matches the IP address currently provided to my source web server by my hosting provider.
- Packets were dropped at your origin web server.
Сhecked, packets are not dropped on the origin web server.
UPD. Still have ERR_CONNECTION_TIMED_OUT in browsers without vpn,
in browsers with vpn my site opens successfully