NAT-T (NAT Traversal) Explained Simply | Why NAT Breaks IPsec VPNs | CISSP Domain 4

👋 Want to learn with me? Join my community: https://www.skool.com/hemantsajwan Get access to live coaching, study resources, practice questions, and a community of like-minded security professionals. --------------------------------------------------- What exactly is NAT-T, and why do IPsec VPNs sometimes stop working when a firewall performing PAT is placed in the middle? This is one of those CISSP topics that many people memorise but very few truly understand. In this video, I explain: ✔ What NAT Traversal (NAT-T) is ✔ Why ESP traffic causes problems with PAT ✔ Why port numbers are important ✔ Why ESP packets are dropped ✔ How UDP port 4500 solves the problem ✔ The relationship between IPsec, ESP, PAT, and NAT-T ✔ How this topic can appear in the CISSP examination If you're preparing for the CISSP exam, this video will help you understand the underlying concept instead of simply memorising definitions. 📌If you'd like to join my "CISSP Accelerator Program" and want to know more about it, you can book a 1:1 call with me here: https://calendly.com/hemantsajwan This is ideal if you're preparing for CISSP and unsure where to begin or want a structured roadmap instead of trying to figure everything out on your own.