Will the Origin IP Still Be Exposed After Enabling a High-Defense CDN? Five Leak Paths, Hardening Order, and Post-Exposure Response

Even after enabling a high-defense CDN, the origin IP can still leak via historical DNS records, subdomains, email, certificate scans, and application outbound connections. This article provides self-check methods for each leak path, explains the hardening order such as origin whitelisting and default site blocking, and clarifies why you should plug the leaks first and then change the IP when the origin is under direct attack.