Released on July 29, 2025, Cilium 1.18 ships Load Balancing redesign, native overlay encryption, ingress bandwidth control, and sidecar-free mTLS. One year later, this version marks the definitive shift from CNI to complete network platform.

iptables is 25 years old in 2026 and relies on O(n) sequential rule chains that collapse at a few thousand entries. eBPF injects verified, JIT-compiled bytecode directly into the Linux kernel, and Cilium builds on that to route, secure, and observe Kubernetes traffic without kube-proxy.