diff --git a/neutron/extensions/security_groups_default_rules.py b/neutron/extensions/security_groups_default_rules.py
new file mode 100644
index 00000000000..be72c3ffd98
--- /dev/null
+++ b/neutron/extensions/security_groups_default_rules.py
@@ -0,0 +1,135 @@
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from neutron_lib.api import converters
+from neutron_lib.api import extensions as api_extensions
+from neutron_lib.plugins import directory
+
+from neutron.api import extensions
+from neutron.api.v2 import base
+from neutron.extensions import securitygroup
+
+# TODO(slaweq): rehome API definition to neutron-lib together with
+# securitygroup API definition
+
+ALIAS = 'security-groups-default-rules'
+IS_SHIM_EXTENSION = False
+IS_STANDARD_ATTR_EXTENSION = False
+NAME = 'Default rules for security groups'
+DESCRIPTION = (
+    'Configure set of security group rules used as default rules '
+    'for every new security group')
+UPDATED_TIMESTAMP = '2022-12-19T10:00:00-00:00'
+
+RESOURCE_NAME = 'default_security_group_rule'
+COLLECTION_NAME = 'default_security_group_rules'
+
+RESOURCE_ATTRIBUTE_MAP = {
+    COLLECTION_NAME: {
+        'id': {
+            'allow_post': False, 'allow_put': False,
+            'validate': {'type:uuid': None},
+            'is_visible': True,
+            'is_filter': True,
+            'is_sort_key': True,
+            'primary_key': True},
+        'remote_group_id': {
+            'allow_post': True, 'allow_put': False,
+            'default': None, 'is_visible': True,
+            'is_sort_key': True, 'is_filter': True},
+        'direction': {
+            'allow_post': True, 'allow_put': False,
+            'is_visible': True, 'is_filter': True,
+            'is_sort_key': True,
+            'validate': {'type:values': ['ingress', 'egress']}},
+        'protocol': {
+            'allow_post': True, 'allow_put': False,
+            'is_visible': True, 'default': None,
+            'is_sort_key': True, 'is_filter': True,
+            'convert_to': securitygroup.convert_protocol},
+        'port_range_min': {
+            'allow_post': True, 'allow_put': False,
+            'convert_to': securitygroup.convert_validate_port_value,
+            'default': None, 'is_visible': True,
+            'is_sort_key': True, 'is_filter': True},
+        'port_range_max': {
+            'allow_post': True, 'allow_put': False,
+            'convert_to': securitygroup.convert_validate_port_value,
+            'default': None, 'is_visible': True,
+            'is_sort_key': True, 'is_filter': True},
+        'ethertype': {
+            'allow_post': True, 'allow_put': False,
+            'is_visible': True, 'default': 'IPv4',
+            'is_filter': True, 'is_sort_key': True,
+            'convert_to': securitygroup.convert_ethertype_to_case_insensitive,
+            'validate': {
+                'type:values': securitygroup.sg_supported_ethertypes}},
+        'remote_ip_prefix': {
+            'allow_post': True, 'allow_put': False,
+            'default': None, 'is_visible': True,
+            'is_sort_key': True, 'is_filter': True,
+            'convert_to': securitygroup.convert_ip_prefix_to_cidr},
+        'used_in_default_sg': {
+            'allow_post': True, 'allow_put': False,
+            'convert_to': converters.convert_to_boolean,
+            'is_visible': True, 'is_filter': True},
+    }
+}
+
+SUB_RESOURCE_ATTRIBUTE_MAP = None
+
+ACTION_MAP = {
+}
+
+ACTION_STATUS = {
+}
+
+REQUIRED_EXTENSIONS = [
+    'security-group'
+]
+
+OPTIONAL_EXTENSIONS = [
+]
+
+
+class Security_groups_default_rules(api_extensions.ExtensionDescriptor):
+    """Security group default rules template extension."""
+
+    @classmethod
+    def get_name(cls):
+        return NAME
+
+    @classmethod
+    def get_alias(cls):
+        return ALIAS
+
+    @classmethod
+    def get_description(cls):
+        return DESCRIPTION
+
+    @classmethod
+    def get_updated(cls):
+        return UPDATED_TIMESTAMP
+
+    @classmethod
+    def get_resources(cls):
+        """Returns Ext Resources."""
+        plugin = directory.get_plugin()
+        params = RESOURCE_ATTRIBUTE_MAP.get(COLLECTION_NAME)
+        controller = base.create_resource(COLLECTION_NAME,
+                                          RESOURCE_NAME,
+                                          plugin, params)
+
+        ex = extensions.ResourceExtension(COLLECTION_NAME,
+                                          controller)
+
+        return [ex]