diff --git a/kubernetes/customresourcedefinitions.gen.yaml b/kubernetes/customresourcedefinitions.gen.yaml
index efbc0941eb..0c46ea1913 100644
--- a/kubernetes/customresourcedefinitions.gen.yaml
+++ b/kubernetes/customresourcedefinitions.gen.yaml
@@ -8670,6 +8670,10 @@ spec:
                           minimum: 0
                           type: integer
                       type: object
+                    serviceProtocol:
+                      description: The protocol to use when proxying traffic to the
+                        service.
+                      type: string
                     tls:
                       description: Set of TLS related options that will enable TLS
                         termination on the sidecar for requests originating from outside
@@ -9212,6 +9216,10 @@ spec:
                           minimum: 0
                           type: integer
                       type: object
+                    serviceProtocol:
+                      description: The protocol to use when proxying traffic to the
+                        service.
+                      type: string
                     tls:
                       description: Set of TLS related options that will enable TLS
                         termination on the sidecar for requests originating from outside
@@ -9754,6 +9762,10 @@ spec:
                           minimum: 0
                           type: integer
                       type: object
+                    serviceProtocol:
+                      description: The protocol to use when proxying traffic to the
+                        service.
+                      type: string
                     tls:
                       description: Set of TLS related options that will enable TLS
                         termination on the sidecar for requests originating from outside
diff --git a/networking/v1alpha3/sidecar.pb.go b/networking/v1alpha3/sidecar.pb.go
index 582a5348c7..d77bc3bdad 100644
--- a/networking/v1alpha3/sidecar.pb.go
+++ b/networking/v1alpha3/sidecar.pb.go
@@ -649,6 +649,10 @@ type IstioIngressListener struct {
 	// sidecar for requests originating from outside the mesh.
 	// Currently supports only SIMPLE and MUTUAL TLS modes.
 	Tls *ServerTLSSettings `protobuf:"bytes,7,opt,name=tls,proto3" json:"tls,omitempty"`
+	// The protocol to use when proxying traffic to the service. This is useful
+	// when the incoming connection's protocol differs from the service, such as
+	// when `tls` is set.
+	ServiceProtocol string `protobuf:"bytes,9,opt,name=service_protocol,json=serviceProtocol,proto3" json:"service_protocol,omitempty"`
 	// Settings controlling the volume of connections Envoy will accept from the network.
 	// This setting overrides the top-level default `inboundConnectionPool` to configure
 	// specific settings for this port. This configuration mirrors the `DestinationRule`'s
@@ -726,6 +730,13 @@ func (x *IstioIngressListener) GetTls() *ServerTLSSettings {
 	return nil
 }
 
+func (x *IstioIngressListener) GetServiceProtocol() string {
+	if x != nil {
+		return x.ServiceProtocol
+	}
+	return ""
+}
+
 func (x *IstioIngressListener) GetConnectionPool() *ConnectionPoolSettings {
 	if x != nil {
 		return x.ConnectionPool
@@ -1104,7 +1115,7 @@ var file_networking_v1alpha3_sidecar_proto_rawDesc = string([]byte{
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@@ -1123,67 +1134,70 @@ var file_networking_v1alpha3_sidecar_proto_rawDesc = string([]byte{
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 })
 
 var (
diff --git a/networking/v1alpha3/sidecar.pb.html b/networking/v1alpha3/sidecar.pb.html
index a4d72f07ba..5565f53a49 100644
--- a/networking/v1alpha3/sidecar.pb.html
+++ b/networking/v1alpha3/sidecar.pb.html
@@ -472,6 +472,17 @@ <h2 id="IstioIngressListener">IstioIngressListener</h2>
 sidecar for requests originating from outside the mesh.
 Currently supports only SIMPLE and MUTUAL TLS modes.</p>
 
+</td>
+</tr>
+<tr id="IstioIngressListener-service_protocol">
+<td><div class="field"><div class="name"><code><a href="#IstioIngressListener-service_protocol">serviceProtocol</a></code></div>
+<div class="type">string</div>
+</div></td>
+<td>
+<p>The protocol to use when proxying traffic to the service. This is useful
+when the incoming connection&rsquo;s protocol differs from the service, such as
+when <code>tls</code> is set.</p>
+
 </td>
 </tr>
 <tr id="IstioIngressListener-connection_pool">
diff --git a/networking/v1alpha3/sidecar.proto b/networking/v1alpha3/sidecar.proto
index b8f5b7b7bb..74affae32b 100644
--- a/networking/v1alpha3/sidecar.proto
+++ b/networking/v1alpha3/sidecar.proto
@@ -466,6 +466,10 @@ message IstioIngressListener {
   // sidecar for requests originating from outside the mesh.
   // Currently supports only SIMPLE and MUTUAL TLS modes.
   ServerTLSSettings tls = 7;
+  // The protocol to use when proxying traffic to the service. This is useful
+  // when the incoming connection's protocol differs from the service, such as
+  // when `tls` is set.
+  string service_protocol = 9;
 
   // Settings controlling the volume of connections Envoy will accept from the network.
   // This setting overrides the top-level default `inboundConnectionPool` to configure