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Oct 23, 2026 · Fundamentals

NAT's Original Sin: Why Your Computer Can't Be a Server

This article explains how NAT, originally a temporary fix for IPv4 address exhaustion, became permanent and broke the internet's original peer-to-peer design, forcing centralization through client-server architecture, complicating direct connections with STUN/TURN/ICE, and hindering IPv6 adoption due to ingrained security mindsets.