- Kubeadm: enable the usage of the secure kube-scheduler and kube-controller-manager ports for health checks. For kube-scheduler was 10251, becomes 10259. For kube-controller-manager was 10252, becomes 10257. ([#85043](https://github.com/kubernetes/kubernetes/pull/85043), [@neolit123](https://github.com/neolit123))

- Added warning for dup ports update/patching in pod's container ports and service ports. ([#113245](https://github.com/kubernetes/kubernetes/pull/113245), [@pacoxu](https://github.com/pacoxu))

- Removed an inaccurate statement about requiring ports when the Pod spec `hostNetwork` field was set. ([#130994](https://github.com/kubernetes/kubernetes/pull/130994), [@BenTheElder](https://github.com/BenTheElder)) [SIG Network and Node]

* Change merge key for VolumeMount to mountPath ([#35071](https://github.com/kubernetes/kubernetes/pull/35071), [@thockin](https://github.com/thockin))
* Turned-off etcd listening on public ports as potentially insecure. Removed ([#35192](https://github.com/kubernetes/kubernetes/pull/35192), [@jszczepkowski](https://github.com/jszczepkowski))
    * experimental support for master replication.

* Update to fluentd-gcp:1.28.3, rebased on ubuntu-slim:0.8 ([#43928](https://github.com/kubernetes/kubernetes/pull/43928), [@ixdy](https://github.com/ixdy))
* Fix polarity of NodePort logic to avoid leaked ports ([#43259](https://github.com/kubernetes/kubernetes/pull/43259), [@thockin](https://github.com/thockin))

*   kubectl `top node` now sorts by name and `top pod` sorts by namespace. Fixed a bug where results were inconsistently sorted. ([#53560](https://github.com/kubernetes/kubernetes/pull/53560),[ @dixudx](https://github.com/dixudx))

* Fix AWS NLB security group updates where valid security group ports were incorrectly removed ([#68422](https://github.com/kubernetes/kubernetes/pull/68422), [@kellycampbell](https://github.com/kellycampbell))
    * when updating a service or when node changes occur.

### Promoted endPort in Network Policy to Stable

Promoted `endPort` in [Network Policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/#targeting-a-range-of-ports) to GA. Network Policy providers that support `endPort` field now can use it to specify a range of ports to apply a Network Policy. Previously, each Network Policy could only target a single port.

- Added namespace autocompletion for `kubectl config set-context` command. ([#124994](https://github.com/kubernetes/kubernetes/pull/124994), [@TessaIO](https://github.com/TessaIO)) [SIG CLI]
- Added ports autocompletion for kubectl port-foward command. ([#124683](https://github.com/kubernetes/kubernetes/pull/124683), [@TessaIO](https://github.com/TessaIO)) [SIG CLI]

- When using `kubectl replace` (or the equivalent API call) on a Service, the caller no longer needs to do a read-modify-write cycle to fetch the allocated values for `.spec.clusterIP` and `.spec.ports[].nodePort`.  Instead the API server will automatically carry these forward from the original object when the new object does not specify them. ([#104673](https://github.com/kubernetes/kubernetes/pull/104673), [@thockin](https://github.com/thockin))...