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Ports and Protocols | Kubernetes

Fleeting

kubernetes

Control plane

Protocol Direction Port Range Purpose Used By
TCP Inbound 6443 Kubernetes API server All
TCP Inbound 2379-2380 etcd server client API kube-apiserver, etcd
TCP Inbound 10250 Kubelet API Self, Control plane
TCP Inbound 10259 kube-scheduler Self
TCP Inbound 10257 kube-controller-manager Self

Although etcd ports are included in control plane section, you can also host your own etcd cluster externally or on custom ports.

Worker node(s)

Protocol Direction Port Range Purpose Used By
TCP Inbound 10250 Kubelet API Self, Control plane
TCP Inbound 30000-32767 NodePort Services† All

https://kubernetes.io/docs/reference/ports-and-protocols/

port 10250 in kubernetes == self

Notes pointant ici