Cloudflare is a service that acts as a reverse proxy between the website visitor and the server, providing DDoS mitigation as well as DNS and CDN services. It’s common for organizations to serve websites with Nginx, a popular web server, with Cloudflare as a CDN and DNS provider. In this tutorial you will secure website with Nginx and Cloudflare, preventing any malicioud requests from reaching your server. Choose your operating system to get started.