ServerShield by Cloudflare

This extension protects your websites against online threats (such as hacking, spamming, botnets, DDoS attacks) while making them load lightning fast.

Licensing

The following features are free:

• Secure your websites.
• Speed up your websites.
• Automatically provision a free SSL certificate for every website secured by ServerShield.
• Get server-wide statistics and website status list.
• Enjoy the benefits of automatic static content caching.
• Use the "StopTheHacker" feature, which monitors the reputation of your website by checking it against malware and phishing blacklists on a daily basis.

To enable additional paid features (for example, web application firewall rulesets), purchase Cloudflare ServerShield Plus Advanced.

Read more about ServerShield by Cloudflare.