How To: Whitelist CloudFlare IPs
When trying to setup Cloudflare DNS for SSL for my DigitalOcean Ubuntu server, I received a “Error 521” and started troubleshooting.
And followed the steps until saving. Since there was no change, when I tested https://MyDomain.com, I didn’t bother saving the iptable entries.
Is there something I’m missing here??
These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.×