*   You can once again use 0 values for conntrack min, max, max per core, tcp close wait timeout, and tcp established timeout; this functionality was broken in 1.8. ([#55261](https://github.com/kubernetes/kubernetes/pull/55261),[ @ncdc](https://github.com/ncdc))

#### **CoreDNS**

Node-local DNS cache feature is available in Alpha. This feature deploys a lightweight DNS caching Daemonset that avoids the conntrack and converts queries from UDP to more reliable TCP.
PodReady++ feature now has `kubectl` CLI support.

Progress was made towards finalizing the IPv6 dual stack support KEP and support for topological routing of services.

### SIG Node

- SCTP is now supported as an additional protocol (alpha) alongside TCP and UDP in Pod, Service, Endpoint, and NetworkPolicy.  ([#64973](https://github.com/kubernetes/kubernetes/pull/64973), [@janosi](https://github.com/janosi)) Courtesy of SIG API Machinery, SIG Apps, SIG Architecture, SIG CLI, SIG Cloud Provider, SIG...

## Changelog since v1.24.10

## Changes by Kind

### Feature

- Kubelet TCP and HTTP probes are more effective using networking resources: conntrack entries, sockets, ... 

- Packets considered INVALID by conntrack are now dropped. In particular, this fixes
a problem where spurious retransmits in a long-running TCP connection to a service
IP could result in the connection being closed with the error "Connection reset by
peer" ([#74840](https://github.com/kubernetes/kubernetes/pull/74840), [@anfernee](https://github.com/anfernee))

## Changelog since v1.26.6

## Changes by Kind

### API Change

- GCE does not support LoadBalancer Services with ports with different protocols (TCP and UDP) ([#115966](https://github.com/kubernetes/kubernetes/pull/115966), [@aojea](https://github.com/aojea)) [SIG Apps and Cloud Provider]

### Feature

- Fixed a regression that sometimes prevented `kubectl portforward` to work when TCP and UDP services were configured on the same port ([#94728](https://github.com/kubernetes/kubernetes/pull/94728), [@amorenoz](https://github.com/amorenoz)) [SIG CLI]

## Changelog since v1.25.6

## Changes by Kind

### Feature

- Kubelet TCP and HTTP probes are more effective using networking resources: conntrack entries, sockets, ... 

- GCE Windows clusters have their TCP/IP parameters are set to GCE's recommended values. ([#103057](https://github.com/kubernetes/kubernetes/pull/103057), [@jeremyje](https://github.com/jeremyje)) [SIG Cloud Provider and Windows]

  specified in /etc/resolv.conf.

* An empty `kube-system:kube-dns` ConfigMap will be created for the cluster if one did not already exist.

### kube-proxy
* **- Add tcp/udp userspace proxy support for Windows. ([#41487](https://github.com/kubernetes/kubernetes/pull/41487), [@anhowe](https://github.com/anhowe))**