This tweet highlights a common limitation in using rate limiting as a defense mechanism against DDoS attacks. Rate limiting controls traffic based on IP or user requests but can be bypassed by attackers who employ large numbers of IPs, proxies, or botnets. This means that relying solely on rate limiting is insufficient for DDoS protection. The best practice is to implement a combination of defenses including a Web Application Firewall (WAF), Content Delivery Network (CDN), edge filtering, and rate limits. These multiple layers of defense work together to provide a more effective shield against high-volume attacks by filtering and mitigating malicious traffic early and preventing it from reaching the origin server. This approach is essential for robust and resilient web security.