* mangle
-N ISTIO_DIVERT
-N ISTIO_TPROXY
-N ISTIO_INBOUND
-A ISTIO_DIVERT -j MARK --set-mark 1337
-A ISTIO_DIVERT -j ACCEPT
-A ISTIO_TPROXY ! -d 127.0.0.1/32 -p tcp -j TPROXY --tproxy-mark 1337/0xffffffff --on-port 15006
-A PREROUTING -p tcp -j ISTIO_INBOUND
-A ISTIO_INBOUND -p tcp --dport 15020 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15021 -j RETURN
-A ISTIO_INBOUND -p tcp --dport 15090 -j RETURN

func ClustersCommand(ctx cli.Context) *cobra.Command {
	var opts clioptions.ControlPlaneOptions
	cmd := &cobra.Command{
		Use:   "remote-clusters",
		Short: "Lists the remote clusters each istiod instance is connected to.",
		RunE: func(cmd *cobra.Command, args []string) error {
			kubeClient, err := ctx.CLIClientWithRevision(opts.Revision)
			if err != nil {
				return err
			}

Remember from the docs [About HTTPS](https.md){.internal-link target=_blank} that only one process can be listening on one combination of port and IP address in a server?

This is still true.

So, to be able to have **multiple processes** at the same time, there has to be a **single process listening on a port** that then transmits the communication to each worker process in some way.

### Memory per Process

      "password".toCharArray(),
    ),
) : Authenticator() {
  val calls = mutableListOf<String>()

  override fun getPasswordAuthentication(): PasswordAuthentication? {
    calls.add(
      "host=$requestingHost port=$requestingPort site=${requestingSite.hostName} " +
        "url=$requestingURL type=$requestorType prompt=$requestingPrompt " +
        "protocol=$requestingProtocol scheme=$requestingScheme",
    )
    return authentication

    matchLabels:
      app: hello
      tier: backend
      track: stable
  strategy: {}
  template:
    metadata:
      annotations:
        prometheus.io/path: /stats/prometheus
        prometheus.io/port: "15020"
        prometheus.io/scrape: "true"
        sidecar.istio.io/status: '{"initContainers":["istio-init"],"containers":["istio-proxy"],"volumes":null,"imagePullSecrets":null,"revision":"default"}'
      creationTimestamp: null

    matchLabels:
      app: hello
      tier: backend
      track: stable
  strategy: {}
  template:
    metadata:
      annotations:
        prometheus.io/path: /stats/prometheus
        prometheus.io/port: "15020"
        prometheus.io/scrape: "true"
        sidecar.istio.io/status: '{"initContainers":["istio-init"],"containers":["istio-proxy"],"volumes":null,"imagePullSecrets":null,"revision":"default"}'
      creationTimestamp: null

  // this service.
  // +optional
  optional string path = 3;

  // If specified, the port on the service that hosting webhook.
  // Default to 443 for backward compatibility.
  // `port` should be a valid port number (1-65535, inclusive).
  // +optional
  optional int32 port = 4;
}

// ValidatingWebhook describes an admission webhook and the resources and operations it applies to.

    interval: 5s
    timeout: 5s
    retries: 5

# starts 4 docker containers running minio server instances.
# using nginx reverse proxy, load balancing, you can access
# it through port 9000.
services:
  minio1:
    <<: *minio-common
    hostname: minio1
    volumes:
      - data1-1:/data1
      - data1-2:/data2

  minio2:
    <<: *minio-common
    hostname: minio2
    volumes:

#                                                     ------
# Does it send mock mail? (true: no send actually, logging only)
mail.send.mock = false

# SMTP server settings for main: host:port
mail.smtp.server.main.host.and.port = localhost:25

# The prefix of subject to show test environment or not
mail.subject.test.prefix = 

# The common return path of all mail
mail.return.path = root@localhost

  }

  @Test
  fun differentInstancesGetDifferentPorts() {
    val other = MockWebServer()
    assertThat(other.port).isNotEqualTo(server.port)
    other.shutdown()
  }

  @Test
  fun statementStartsAndStops() {
    val called = AtomicBoolean()
    val statement =
      server.apply(
        object : Statement() {
          override fun evaluate() {
            called.set(true)