diff --git a/api/v1alpha1/envoygateway_types.go b/api/v1alpha1/envoygateway_types.go
index 080d3020b67..882aff68a00 100644
--- a/api/v1alpha1/envoygateway_types.go
+++ b/api/v1alpha1/envoygateway_types.go
@@ -482,23 +482,23 @@ type XDSTranslatorHooks struct {
 
 // ExtensionService defines the configuration for connecting to a registered extension service.
 type ExtensionService struct {
+	// BackendEndpoint points to where the extension server can be found.
+	BackendEndpoint `json:",inline"`
+
 	// Host define the extension service hostname.
-	// Deprecated: use the backend attribute instead
+	// Deprecated: use the appropriate transport attribute instead (FQDN,IPv4,Unix)
 	//
 	// +optional
 	Host string `json:"host,omitempty"`
 
 	// Port defines the port the extension service is exposed on.
-	// Deprecated: use the backend attribute instead
+	// Deprecated: use the appropriate transport attribute instead (FQDN,IPv4,Unix)
 	//
 	// +optional
 	// +kubebuilder:validation:Minimum=0
 	// +kubebuilder:default=80
 	Port int32 `json:"port,omitempty"`
 
-	// Backend points to where the extension server can be found.
-	Backend BackendEndpoint `json:"backend"`
-
 	// TLS defines TLS configuration for communication between Envoy Gateway and
 	// the extension service.
 	//
diff --git a/api/v1alpha1/validation/envoygateway_validate.go b/api/v1alpha1/validation/envoygateway_validate.go
index 49ca6e35452..d4f27633c6f 100644
--- a/api/v1alpha1/validation/envoygateway_validate.go
+++ b/api/v1alpha1/validation/envoygateway_validate.go
@@ -86,12 +86,12 @@ func ValidateEnvoyGateway(eg *v1alpha1.EnvoyGateway) error {
 		}
 
 		switch {
-		case eg.ExtensionManager.Service.Host == "" && eg.ExtensionManager.Service.Backend.FQDN == nil && eg.ExtensionManager.Service.Backend.Unix == nil && eg.ExtensionManager.Service.Backend.IPv4 == nil:
+		case eg.ExtensionManager.Service.Host == "" && eg.ExtensionManager.Service.FQDN == nil && eg.ExtensionManager.Service.Unix == nil && eg.ExtensionManager.Service.IPv4 == nil:
 			return fmt.Errorf("extension service must contain a configured target")
 
-		case eg.ExtensionManager.Service.Backend.FQDN != nil && (eg.ExtensionManager.Service.Backend.IPv4 != nil || eg.ExtensionManager.Service.Backend.Unix != nil || eg.ExtensionManager.Service.Host != ""),
-			eg.ExtensionManager.Service.Backend.IPv4 != nil && (eg.ExtensionManager.Service.Backend.FQDN != nil || eg.ExtensionManager.Service.Backend.Unix != nil || eg.ExtensionManager.Service.Host != ""),
-			eg.ExtensionManager.Service.Backend.Unix != nil && (eg.ExtensionManager.Service.Backend.IPv4 != nil || eg.ExtensionManager.Service.Backend.FQDN != nil || eg.ExtensionManager.Service.Host != ""):
+		case eg.ExtensionManager.Service.FQDN != nil && (eg.ExtensionManager.Service.IPv4 != nil || eg.ExtensionManager.Service.Unix != nil || eg.ExtensionManager.Service.Host != ""),
+			eg.ExtensionManager.Service.IPv4 != nil && (eg.ExtensionManager.Service.FQDN != nil || eg.ExtensionManager.Service.Unix != nil || eg.ExtensionManager.Service.Host != ""),
+			eg.ExtensionManager.Service.Unix != nil && (eg.ExtensionManager.Service.IPv4 != nil || eg.ExtensionManager.Service.FQDN != nil || eg.ExtensionManager.Service.Host != ""):
 
 			return fmt.Errorf("only one backend target can be configured for the extension manager")
 
diff --git a/api/v1alpha1/validation/envoygateway_validate_test.go b/api/v1alpha1/validation/envoygateway_validate_test.go
index f584630280e..2823e70a47c 100644
--- a/api/v1alpha1/validation/envoygateway_validate_test.go
+++ b/api/v1alpha1/validation/envoygateway_validate_test.go
@@ -584,7 +584,7 @@ func TestValidateEnvoyGateway(t *testing.T) {
 							},
 						},
 						Service: &v1alpha1.ExtensionService{
-							Backend: v1alpha1.BackendEndpoint{
+							BackendEndpoint: v1alpha1.BackendEndpoint{
 								FQDN: &v1alpha1.FQDNEndpoint{
 									Hostname: "foo.example.com",
 									Port:     8080,
@@ -614,7 +614,7 @@ func TestValidateEnvoyGateway(t *testing.T) {
 							},
 						},
 						Service: &v1alpha1.ExtensionService{
-							Backend: v1alpha1.BackendEndpoint{
+							BackendEndpoint: v1alpha1.BackendEndpoint{
 								FQDN: &v1alpha1.FQDNEndpoint{
 									Hostname: "foo.example.com",
 									Port:     8080,
@@ -647,7 +647,7 @@ func TestValidateEnvoyGateway(t *testing.T) {
 						Service: &v1alpha1.ExtensionService{
 							Host: "foo.example.com",
 							Port: 8080,
-							Backend: v1alpha1.BackendEndpoint{
+							BackendEndpoint: v1alpha1.BackendEndpoint{
 								FQDN: &v1alpha1.FQDNEndpoint{
 									Hostname: "foo.example.com",
 									Port:     8080,
diff --git a/api/v1alpha1/zz_generated.deepcopy.go b/api/v1alpha1/zz_generated.deepcopy.go
index ed9ce8f5993..8720b70a549 100644
--- a/api/v1alpha1/zz_generated.deepcopy.go
+++ b/api/v1alpha1/zz_generated.deepcopy.go
@@ -2014,7 +2014,7 @@ func (in *ExtensionManager) DeepCopy() *ExtensionManager {
 // DeepCopyInto is an autogenerated deepcopy function, copying the receiver, writing into out. in must be non-nil.
 func (in *ExtensionService) DeepCopyInto(out *ExtensionService) {
 	*out = *in
-	in.Backend.DeepCopyInto(&out.Backend)
+	in.BackendEndpoint.DeepCopyInto(&out.BackendEndpoint)
 	if in.TLS != nil {
 		in, out := &in.TLS, &out.TLS
 		*out = new(ExtensionTLS)
diff --git a/internal/extension/registry/extension_manager.go b/internal/extension/registry/extension_manager.go
index 7dbec46b476..7ef203e5ab8 100644
--- a/internal/extension/registry/extension_manager.go
+++ b/internal/extension/registry/extension_manager.go
@@ -122,12 +122,12 @@ func (m *Manager) HasExtension(g v1.Group, k v1.Kind) bool {
 func getExtensionServerAddress(service *v1alpha1.ExtensionService) string {
 	var serverAddr string
 	switch {
-	case service.Backend.FQDN != nil:
-		serverAddr = fmt.Sprintf("%s:%d", service.Backend.FQDN.Hostname, service.Backend.FQDN.Port)
-	case service.Backend.IPv4 != nil:
-		serverAddr = fmt.Sprintf("%s:%d", service.Backend.IPv4.Address, service.Backend.IPv4.Port)
-	case service.Backend.Unix != nil:
-		serverAddr = fmt.Sprintf("unix://%s", service.Backend.Unix.Path)
+	case service.FQDN != nil:
+		serverAddr = fmt.Sprintf("%s:%d", service.FQDN.Hostname, service.FQDN.Port)
+	case service.IPv4 != nil:
+		serverAddr = fmt.Sprintf("%s:%d", service.IPv4.Address, service.IPv4.Port)
+	case service.Unix != nil:
+		serverAddr = fmt.Sprintf("unix://%s", service.Unix.Path)
 	case service.Host != "":
 		serverAddr = fmt.Sprintf("%s:%d", service.Host, service.Port)
 	}
diff --git a/internal/extension/registry/extension_manager_test.go b/internal/extension/registry/extension_manager_test.go
index c7c07fc579c..28e7d84ffdd 100644
--- a/internal/extension/registry/extension_manager_test.go
+++ b/internal/extension/registry/extension_manager_test.go
@@ -22,7 +22,7 @@ func TestGetExtensionServerAddress(t *testing.T) {
 		{
 			Name: "has an FQDN",
 			Service: &v1alpha1.ExtensionService{
-				Backend: v1alpha1.BackendEndpoint{
+				BackendEndpoint: v1alpha1.BackendEndpoint{
 					FQDN: &v1alpha1.FQDNEndpoint{
 						Hostname: "extserver.svc.cluster.local",
 						Port:     5050,
@@ -34,7 +34,7 @@ func TestGetExtensionServerAddress(t *testing.T) {
 		{
 			Name: "has an IPv4",
 			Service: &v1alpha1.ExtensionService{
-				Backend: v1alpha1.BackendEndpoint{
+				BackendEndpoint: v1alpha1.BackendEndpoint{
 					IPv4: &v1alpha1.IPv4Endpoint{
 						Address: "10.10.10.10",
 						Port:    5050,
@@ -46,7 +46,7 @@ func TestGetExtensionServerAddress(t *testing.T) {
 		{
 			Name: "has a Unix path",
 			Service: &v1alpha1.ExtensionService{
-				Backend: v1alpha1.BackendEndpoint{
+				BackendEndpoint: v1alpha1.BackendEndpoint{
 					Unix: &v1alpha1.UnixSocket{
 						Path: "/some/path",
 					},
diff --git a/site/content/en/latest/api/extension_types.md b/site/content/en/latest/api/extension_types.md
index f3808749a3e..0ba1f5677c6 100644
--- a/site/content/en/latest/api/extension_types.md
+++ b/site/content/en/latest/api/extension_types.md
@@ -1515,9 +1515,11 @@ _Appears in:_
 
 | Field | Type | Required | Description |
 | ---   | ---  | ---      | ---         |
-| `host` | _string_ |  false  | Host define the extension service hostname.<br />Deprecated: use the backend attribute instead |
-| `port` | _integer_ |  false  | Port defines the port the extension service is exposed on.<br />Deprecated: use the backend attribute instead |
-| `backend` | _[BackendEndpoint](#backendendpoint)_ |  true  | Backend points to where the extension server can be found. |
+| `fqdn` | _[FQDNEndpoint](#fqdnendpoint)_ |  false  | FQDN defines a FQDN endpoint |
+| `ipv4` | _[IPv4Endpoint](#ipv4endpoint)_ |  false  | IPv4 defines an IPv4 endpoint |
+| `unix` | _[UnixSocket](#unixsocket)_ |  false  | Unix defines the unix domain socket endpoint |
+| `host` | _string_ |  false  | Host define the extension service hostname.<br />Deprecated: use the appropriate transport attribute instead (FQDN,IPv4,Unix) |
+| `port` | _integer_ |  false  | Port defines the port the extension service is exposed on.<br />Deprecated: use the appropriate transport attribute instead (FQDN,IPv4,Unix) |
 | `tls` | _[ExtensionTLS](#extensiontls)_ |  false  | TLS defines TLS configuration for communication between Envoy Gateway and<br />the extension service. |
 
 
@@ -1544,6 +1546,7 @@ https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/core/v3/address.proto#
 
 _Appears in:_
 - [BackendEndpoint](#backendendpoint)
+- [ExtensionService](#extensionservice)
 
 | Field | Type | Required | Description |
 | ---   | ---  | ---      | ---         |
@@ -1927,6 +1930,7 @@ https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/core/v3/address.proto#
 
 _Appears in:_
 - [BackendEndpoint](#backendendpoint)
+- [ExtensionService](#extensionservice)
 
 | Field | Type | Required | Description |
 | ---   | ---  | ---      | ---         |
@@ -3522,6 +3526,7 @@ https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/core/v3/address.proto#
 
 _Appears in:_
 - [BackendEndpoint](#backendendpoint)
+- [ExtensionService](#extensionservice)
 
 | Field | Type | Required | Description |
 | ---   | ---  | ---      | ---         |