pm := GatewayPortMap{}
	for r, s := range serversByRouteName {
		portNumber, _, _ := ParseGatewayRDSRouteName(r)
		if _, f := pm[portNumber]; !f {
			pm[portNumber] = sets.New[int]()
		}
		for _, se := range s {
			if se.Port == nil {
				continue
			}
			pm[portNumber].Insert(int(se.Port.Number))
		}
	}
	return pm

				Context: networking.EnvoyFilter_SIDECAR_OUTBOUND,
				ObjectTypes: &networking.EnvoyFilter_EnvoyConfigObjectMatch_Listener{
					Listener: &networking.EnvoyFilter_ListenerMatch{
						PortNumber: 81,
					},
				},
			},
			Patch: &networking.EnvoyFilter_Patch{
				Operation: networking.EnvoyFilter_Patch_REMOVE,
			},
		},
		{
			ApplyTo: networking.EnvoyFilter_LISTENER,

	sidecarScope := proxy.SidecarScope
	for _, ingressListener := range sidecarScope.Sidecar.Ingress {
		// LDS would have setup the inbound clusters
		// as inbound|portNumber|portName|Hostname[or]SidecarScopeID
		listenPort := &model.Port{
			Port:     int(ingressListener.Port.Number),
			Protocol: protocol.Parse(ingressListener.Port.Protocol),
			Name:     ingressListener.Port.Name,
		}

	if needMesh {
		meshResult = convertRules(true)
	}
	if needGw {
		gwResult = convertRules(false)
	}
	return meshResult, gwResult
}

func augmentPortMatch(routes []*istio.HTTPRoute, port k8s.PortNumber) []*istio.HTTPRoute {
	res := make([]*istio.HTTPRoute, 0, len(routes))
	for _, r := range routes {
		r = r.DeepCopy()
		for _, m := range r.Match {
			m.Port = uint32(port)
		}
		if len(r.Match) == 0 {