diff --git a/ofono/include/dbus-access.h b/ofono/include/dbus-access.h
index ace340ce..c62ce6de 100644
--- a/ofono/include/dbus-access.h
+++ b/ofono/include/dbus-access.h
@@ -41,6 +41,8 @@ enum ofono_dbus_access_intf {
 	OFONO_DBUS_ACCESS_INTF_RADIOSETTINGS, /* org.ofono.RadioSettings */
 	OFONO_DBUS_ACCESS_INTF_STK,           /* org.ofono.SimToolkit */
 	OFONO_DBUS_ACCESS_INTF_OEMRAW,        /* org.ofono.OemRaw */
+	/* Since 1.29+git3 */
+	OFONO_DBUS_ACCESS_INTF_IMS,           /* org.ofono.IpMultimediaSystem */
 	OFONO_DBUS_ACCESS_INTF_COUNT
 };
 
@@ -132,6 +134,15 @@ enum ofono_dbus_access_oemraw_method {
 	OFONO_DBUS_ACCESS_OEMRAW_METHOD_COUNT
 };
 
+/* OFONO_DBUS_ACCESS_INTF_IMS */
+enum ofono_dbus_access_ims_method {
+	/* Since 1.29+git3 */
+	OFONO_DBUS_ACCESS_IMS_SET_PROPERTY,
+	OFONO_DBUS_ACCESS_IMS_REGISTER,
+	OFONO_DBUS_ACCESS_IMS_UNREGISTER,
+	OFONO_DBUS_ACCESS_IMS_METHOD_COUNT
+};
+
 #define OFONO_DBUS_ACCESS_PRIORITY_LOW     (-100)
 #define OFONO_DBUS_ACCESS_PRIORITY_DEFAULT (0)
 #define OFONO_DBUS_ACCESS_PRIORITY_HIGH    (100)
@@ -159,7 +170,7 @@ const char *ofono_dbus_access_intf_name(enum ofono_dbus_access_intf intf);
 const char *ofono_dbus_access_method_name(enum ofono_dbus_access_intf intf,
 								int method);
 
-/* Since mer/1.24+git2 */
+/* Since 1.24+git2 */
 ofono_bool_t ofono_dbus_access_method_allowed(const char *sender,
 	enum ofono_dbus_access_intf iface, int method, const char *arg);
 
diff --git a/ofono/src/dbus-access.c b/ofono/src/dbus-access.c
index 480dbd20..11769734 100644
--- a/ofono/src/dbus-access.c
+++ b/ofono/src/dbus-access.c
@@ -46,6 +46,8 @@ const char *ofono_dbus_access_intf_name(enum ofono_dbus_access_intf intf)
 		return OFONO_STK_INTERFACE;
 	case OFONO_DBUS_ACCESS_INTF_OEMRAW:
 		return "org.ofono.OemRaw";
+	case OFONO_DBUS_ACCESS_INTF_IMS:
+		return OFONO_IMS_INTERFACE;
 	case OFONO_DBUS_ACCESS_INTF_COUNT:
 		break;
 	}
@@ -188,6 +190,18 @@ const char *ofono_dbus_access_method_name(enum ofono_dbus_access_intf intf,
 			break;
 		}
 		break;
+	case OFONO_DBUS_ACCESS_INTF_IMS:
+		switch ((enum ofono_dbus_access_ims_method)method) {
+		case OFONO_DBUS_ACCESS_IMS_SET_PROPERTY:
+			return "SetProperty";
+		case OFONO_DBUS_ACCESS_IMS_REGISTER:
+			return "Register";
+		case OFONO_DBUS_ACCESS_IMS_UNREGISTER:
+			return "Unregister";
+		case OFONO_DBUS_ACCESS_IMS_METHOD_COUNT:
+			break;
+		}
+		break;
 	case OFONO_DBUS_ACCESS_INTF_COUNT:
 		break;
 	}
diff --git a/ofono/src/ims.c b/ofono/src/ims.c
index 6f79cecc..1c33fa2b 100644
--- a/ofono/src/ims.c
+++ b/ofono/src/ims.c
@@ -51,6 +51,13 @@ struct ofono_ims {
 
 static GSList *g_drivers = NULL;
 
+static inline gboolean ims_dbus_access_allowed(DBusMessage *msg,
+				enum ofono_dbus_access_ims_method method)
+{
+	return ofono_dbus_access_method_allowed(dbus_message_get_sender(msg),
+				OFONO_DBUS_ACCESS_INTF_IMS, method, NULL);
+}
+
 static DBusMessage *ims_get_properties(DBusConnection *conn,
 					DBusMessage *msg, void *data)
 {
@@ -209,6 +216,9 @@ static DBusMessage *ofono_ims_send_register(DBusConnection *conn,
 {
 	struct ofono_ims *ims = data;
 
+	if (!ims_dbus_access_allowed(msg, OFONO_DBUS_ACCESS_IMS_REGISTER))
+		return __ofono_error_access_denied(msg);
+
 	if (ims->pending)
 		return __ofono_error_busy(msg);
 
@@ -227,6 +237,9 @@ static DBusMessage *ofono_ims_unregister(DBusConnection *conn,
 {
 	struct ofono_ims *ims = data;
 
+	if (!ims_dbus_access_allowed(msg, OFONO_DBUS_ACCESS_IMS_UNREGISTER))
+		return __ofono_error_access_denied(msg);
+
 	if (ims->pending)
 		return __ofono_error_busy(msg);
 
diff --git a/ofono/unit/test-dbus-access.c b/ofono/unit/test-dbus-access.c
index 0f044fd1..b214c5f4 100644
--- a/ofono/unit/test-dbus-access.c
+++ b/ofono/unit/test-dbus-access.c
@@ -1,7 +1,7 @@
 /*
  *  oFono - Open Source Telephony
  *
- *  Copyright (C) 2019-2021 Jolla Ltd.
+ *  Copyright (C) 2019-2022 Jolla Ltd.
  *  Copyright (C) 2020 Open Mobile Platform LLC.
  *
  *  This program is free software; you can redistribute it and/or modify
@@ -122,6 +122,9 @@ static const struct test_method_name_data method_name_tests[] = {
 	},{
 		OFONO_DBUS_ACCESS_INTF_OEMRAW,
 		OFONO_DBUS_ACCESS_OEMRAW_METHOD_COUNT
+	},{
+		OFONO_DBUS_ACCESS_INTF_IMS,
+		OFONO_DBUS_ACCESS_IMS_METHOD_COUNT
 	}
 };