#networkpolicy

Articles tagged with "networkpolicy"

Oct 20, 2026 #k3s #kubernetes #cni #flannel #calico #cilium #networkpolicy #networking

K3s vs Standard Kubernetes: How Different Their CNI Starting Points Really Are

K3s ships with Flannel built in, while standard Kubernetes starts with no CNI selected at all. This comparison, grounded in the official K3s, Kubernetes, Calico, and Cilium docs, explains how that difference affects NetworkPolicy enforcement and network performance.

Sep 24, 2026 #k3s #kubernetes #networkpolicy #servicelb #kube-router #network-security

"K3s Ignores NetworkPolicy" Was a Myth. Traffic Still Leaked Through — the ServiceLB Blind Spot

K3s enforces NetworkPolicy by default via its built-in kube-router controller. Yet traffic via LoadBalancer still leaked through — the cause was ServiceLB's implementation combined with a permanent limitation of the NetworkPolicy API. Here's how to detect and fix it.