Dive deep into Server-Side Request Forgery (SSRF) protection techniques for Flask applications through hands-on implementations. Learn to prevent internal service access, cloud metadata exposure, network security bypasses, and out-of-band data exfiltration that compromise application security. Explore domain whitelisting strategies with `urlparse`[9], IP range blocking, request timeout configurations, and OWASP-recommended input validation patterns. Develop skills to create resilient web services that properly validate, sanitize, and control external requests while implementing allowlist-based security.