Cloudflare Error 523: Origin is unreachable.
I am facing this error Error 523: Origin is unreachable. Cloudflare said
If you're the owner of this website:
Check your DNS Settings. A 523 error means that Cloudflare could not >reach your host web server. The most common cause is that your DNS >settings are incorrect. Please contact your hosting provider to >confirm your origin IP and then make sure the correct IP is listed for >your A record in your Cloudflare DNS Settings page.
Error 523 in Cloudflare suggests that Cloudflare isn't able to connect with the website host, or in this case, your Linode. Here are three steps you can take to help resolve this:
Make sure that Cloudflare's IP is pointing to your Linode's IP.
Connect to your Linode and restart your webserver (Apache2, Nginx)
Check for common problems on your Linode
Do you have enough disk space?
Is your key services active and listening?
Are you out of memory?
Is your firewall blocking connections?