Next, we terminate the CONNECT.
From the [headers](#headers), we know the target destination.
If the target destination has a waypoint, we enforce that the request is coming from that waypoint. Otherwise, the request is rejected.
If there is no waypoint, ztunnel will enforce RBAC policies against the request.

[unassigned open issue](https://github.com/istio/istio/issues?q=is%3Aissue+is%3Aopen+label%3Aarea%2Fenvironments%2Foperator+no%3Aassignee),
creating a [bug or feature request](../BUGS-AND-FEATURE-REQUESTS.md),
or just coming to the weekly [Environments Working Group](https://github.com/istio/community/blob/master/WORKING-GROUPS.md)
meeting to share your ideas.

  optional k8s.io.apimachinery.pkg.apis.meta.v1.LabelSelector selector = 4;

  // manualSelector controls generation of pod labels and pod selectors.
  // Leave `manualSelector` unset unless you are certain what you are doing.
  // When false or unset, the system pick labels unique to this job
  // and appends those labels to the pod template.  When true,
  // the user is responsible for picking unique labels and specifying

  optional ContainerResourceMetricSource containerResource = 7;

  // external refers to a global metric that is not associated
  // with any Kubernetes object. It allows autoscaling based on information
  // coming from components running outside of cluster
  // (for example length of queue in cloud messaging service, or
  // QPS from loadbalancer running outside of cluster).
  // +optional
  optional ExternalMetricSource external = 5;

  optional ContainerResourceMetricSource containerResource = 7;

  // external refers to a global metric that is not associated
  // with any Kubernetes object. It allows autoscaling based on information
  // coming from components running outside of cluster
  // (for example length of queue in cloud messaging service, or
  // QPS from loadbalancer running outside of cluster).
  // +optional
  optional ExternalMetricSource external = 5;

  // connection to the real kubelet is vulnerable to a man in the middle attack (e.g. an attacker could not intercept
  // the actual log data coming from the real kubelet).
  // +optional
  optional bool insecureSkipTLSVerifyBackend = 9;
}

// PodOS defines the OS parameters of a pod.
message PodOS {

#### Optimizations

A naive implementation would simply regenerate all resources, of all subscribed types, for each client, on any configuration change. However, this scales poorly. As a result, we have many levels of optimizations to avoid doing this work.

  optional ContainerResourceMetricSource containerResource = 7;

  // external refers to a global metric that is not associated
  // with any Kubernetes object. It allows autoscaling based on information
  // coming from components running outside of cluster
  // (for example length of queue in cloud messaging service, or
  // QPS from loadbalancer running outside of cluster).
  // +optional
  optional ExternalMetricSource external = 5;

  optional ContainerResourceMetricSource containerResource = 7;

  // external refers to a global metric that is not associated
  // with any Kubernetes object. It allows autoscaling based on information
  // coming from components running outside of cluster
  // (for example length of queue in cloud messaging service, or
  // QPS from loadbalancer running outside of cluster).
  // +optional
  optional ExternalMetricSource external = 5;