Spectrum for UDP: DDoS protection and firewalling for unreliable protocols

What this post added

This post introduces Spectrum for UDP, extending Cloudflare's DDoS protection and IP firewalling capabilities to UDP-based services. It highlights the challenges of securing UDP applications and introduces a custom 'Simple Proxy Protocol' to enable origins to retrieve client IP information, similar to the Proxy Protocol for TCP. This expands the scope of Spectrum beyond TCP to encompass a wider range of applications, including gaming and custom protocols.