{
                    "endpoint_config": {
                        "@type": "type.googleapis.com/envoy.config.endpoint.v3.ClusterLoadAssignment",
                        "cluster_name": "PassthroughCluster",
                        "policy": {
                            "overprovisioning_factor": 140
                        }
                    }
                },
                {

	var egressCluster string

	if util.IsAllowAnyOutbound(node) {
		// We need a passthrough filter to fill in the filter stack for orig_dst listener
		egressCluster = util.PassthroughCluster

		// no need to check for nil value as the previous if check has checked
		if node.SidecarScope.OutboundTrafficPolicy.EgressProxy != nil {
			// user has provided an explicit destination for all the unknown traffic.

// This cluster is used to catch all traffic to unknown listener ports
func (cb *ClusterBuilder) buildDefaultPassthroughCluster() *cluster.Cluster {
	cluster := &cluster.Cluster{
		Name:                 util.PassthroughCluster,
		ClusterDiscoveryType: &cluster.Cluster_Type{Type: cluster.Cluster_ORIGINAL_DST},
		ConnectTimeout:       proto.Clone(cb.req.Push.Mesh.ConnectTimeout).(*durationpb.Duration),

	}
	return
}

func buildCatchAllVirtualHost(node *model.Proxy, includeRequestAttemptCount bool) *route.VirtualHost {
	if util.IsAllowAnyOutbound(node) {
		egressCluster := util.PassthroughCluster
		notimeout := durationpb.New(0)

		// no need to check for nil value as the previous if check has checked
		if node.SidecarScope.OutboundTrafficPolicy.EgressProxy != nil {

				meshconfig.MeshConfig_OutboundTrafficPolicy_REGISTRY_ONLY: util.BlackHoleCluster,
				meshconfig.MeshConfig_OutboundTrafficPolicy_ALLOW_ANY:     util.PassthroughCluster,
			}[tp]
			t.Run("with VIP", func(t *testing.T) {
				testCalls := []simulation.Expect{}
				for name, call := range calls {
					e := simulation.Expect{
						Name: name,
						Call: call,

	verifyListenerFilters(t, l.ListenerFilters)
}

func verifyPassThroughTCPFilterChain(t *testing.T, fc *listener.FilterChain) {
	t.Helper()
	f := fc.Filters[0]
	expectedStatPrefix := util.PassthroughCluster
	cfg, _ := conversion.MessageToStruct(f.GetTypedConfig())
	statPrefix := cfg.Fields["stat_prefix"].GetStringValue()
	if statPrefix != expectedStatPrefix {