diff --git a/apps/assets/api/asset.py b/apps/assets/api/asset.py
index 371ee1fdc..39341328b 100644
--- a/apps/assets/api/asset.py
+++ b/apps/assets/api/asset.py
@@ -36,7 +36,6 @@ class AssetViewSet(OrgBulkModelViewSet):
     serializer_class = serializers.AssetSerializer
     permission_classes = (IsOrgAdminOrAppUser,)
     extra_filter_backends = [AssetByNodeFilterBackend, LabelFilterBackend]
-    custom_filter_fields = ['admin_user_id']
 
     def set_assets_node(self, assets):
         if not isinstance(assets, list):
@@ -53,19 +52,6 @@ class AssetViewSet(OrgBulkModelViewSet):
         assets = serializer.save()
         self.set_assets_node(assets)
 
-    def filter_admin_user_id(self, queryset):
-        admin_user_id = self.request.query_params.get('admin_user_id')
-        if not admin_user_id:
-            return queryset
-        admin_user = get_object_or_404(AdminUser, id=admin_user_id)
-        queryset = queryset.filter(admin_user=admin_user)
-        return queryset
-
-    def filter_queryset(self, queryset):
-        queryset = super().filter_queryset(queryset)
-        queryset = self.filter_admin_user_id(queryset)
-        return queryset
-
 
 class AssetRefreshHardwareApi(generics.RetrieveAPIView):
     """
diff --git a/apps/assets/api/domain.py b/apps/assets/api/domain.py
index c82c75788..03c4c2307 100644
--- a/apps/assets/api/domain.py
+++ b/apps/assets/api/domain.py
@@ -16,23 +16,14 @@ __all__ = ['DomainViewSet', 'GatewayViewSet', "GatewayTestConnectionApi"]
 
 class DomainViewSet(OrgBulkModelViewSet):
     queryset = Domain.objects.all()
-    permission_classes = (IsOrgAdmin,)
+    permission_classes = (IsOrgAdminOrAppUser,)
     serializer_class = serializers.DomainSerializer
 
-    def get_queryset(self):
-        queryset = super().get_queryset().all()
-        return queryset
-
     def get_serializer_class(self):
         if self.request.query_params.get('gateway'):
             return serializers.DomainWithGatewaySerializer
         return super().get_serializer_class()
 
-    def get_permissions(self):
-        if self.request.query_params.get('gateway'):
-            self.permission_classes = (IsOrgAdminOrAppUser,)
-        return super().get_permissions()
-
 
 class GatewayViewSet(OrgBulkModelViewSet):
     filter_fields = ("domain__name", "name", "username", "ip", "domain")
diff --git a/apps/terminal/api/session.py b/apps/terminal/api/session.py
index e7da10125..5303bbdb2 100644
--- a/apps/terminal/api/session.py
+++ b/apps/terminal/api/session.py
@@ -8,7 +8,6 @@ from django.http import HttpResponseNotFound
 from django.conf import settings
 from rest_framework import viewsets
 from rest_framework.response import Response
-from rest_framework.generics import GenericAPIView
 import jms_storage
 
 from common.utils import is_uuid, get_logger
@@ -35,6 +34,7 @@ class SessionViewSet(OrgBulkModelViewSet):
     date_range_filter_fields = [
         ('date_start', ('date_from', 'date_to'))
     ]
+    extra_filter_backends = [DatetimeRangeFilter]
 
     def filter_queryset(self, queryset):
         queryset = super().filter_queryset(queryset)
@@ -43,12 +43,6 @@ class SessionViewSet(OrgBulkModelViewSet):
             queryset = queryset.select_for_update()
         return queryset
 
-    @property
-    def filter_backends(self):
-        backends = list(GenericAPIView.filter_backends)
-        backends.append(DatetimeRangeFilter)
-        return backends
-
     def perform_create(self, serializer):
         if hasattr(self.request.user, 'terminal'):
             serializer.validated_data["terminal"] = self.request.user.terminal