Why flat Kubernetes networks fail at scale
Rethinking network security hierarchies for cloud-native platforms Kubernetes networking is powerful. Its flexibility lets teams connect hundreds of microservices across namespaces, clusters, and environments. But as platforms grow, that same flexibility can turn a neat setup into a tangled, fragile system. For many organizations, networking is where friction shows up first. Engineers struggle to debug connectivity issues. Security teams wrestle with enforcing global controls. Platform architects feel the pressure to prove compliance. And most of these headaches come from a common root cause: flat network security models that don’t scale. The limits of flat networking Kubernetes NetworkPolicy gives teams a way to control traffic between workloads. By default, all policies exist at the same level with no built-in manageable priority. “As policies grow, it’s increasingly hard to predict what will happen when you make a change.” That works fine in a small, single-team cluster. But in large, multi-team environments, it quickly becomes risky. In a flat model, security is managed by exception rather than enforcement. Protecting a critical service often means listing every allowed connection and hoping nothing else accidentally overrides it. As policies grow, it’s increasingly hard to predict what will happen when you make a change. Without Continue reading
For over three decades, BGP’s AS_SET path segment has been a legal, if problematic, feature of Internet routing. In May 2025, the IETF formally ended that era. 
