Can Cloudflare protect my website from a DDoS attack?
If your website is experiencing a DDoS attack, then Cloudflare could help mitigate it.
The Cloudflare service has an option designed to be used when under a DDoS attack and to enable it, go to your Cloudflare dashboard > Security > Settings and change the value of the Security Level option to I’m Under Attack.
When this option is enabled, every visitor for your website will see a processing page for several seconds. During that time Cloudflare will verify and confirm if the hit is indeed coming from a legitimate visitor and not from a bot.