Curated port reference

Port 10257: kube-controller-manager

kube-controller-manager commonly uses port 10257 over TCP. Review its purpose, traffic direction and operational security considerations.

10257TCP

kube-controller-manager

Default secure serving port for the Kubernetes controller manager.

Typical use

Control-plane health, metrics and internal management traffic.

Traffic direction

Cluster internal

Security considerations

Keep limited to the control-plane or approved monitoring paths and do not expose publicly.