diff --git a/recipes-core/init-ifupdown/init-ifupdown/99-ifupdown.conf b/recipes-core/init-ifupdown/init-ifupdown/99-ifupdown.conf
index bb79c384..353dfb26 100644
--- a/recipes-core/init-ifupdown/init-ifupdown/99-ifupdown.conf
+++ b/recipes-core/init-ifupdown/init-ifupdown/99-ifupdown.conf
@@ -1,3 +1,8 @@
+#
+# Copyright (C) 2025 iris-GmbH infrared & intelligent sensors
+#
+# SPDX-License-Identifier: MIT
+#
 # the current /etc/udev/scripts/network.sh requires
 # this to work well for spoof protection detection
 net.ipv4.conf.lo.rp_filter=1
diff --git a/recipes-core/init-ifupdown/init-ifupdown/ethconfig b/recipes-core/init-ifupdown/init-ifupdown/ethconfig
index b96e7320..dcef2388 100644
--- a/recipes-core/init-ifupdown/init-ifupdown/ethconfig
+++ b/recipes-core/init-ifupdown/init-ifupdown/ethconfig
@@ -1,6 +1,9 @@
 #!/bin/bash
 #
 # Copyright (C) 2016-2023 DResearch Fahrzeugelektronik GmbH
+# Copyright (C) 2025 iris-GmbH infrared & intelligent sensors
+#
+# SPDX-License-Identifier: MIT
 #
 
 VERBOSITY=0
diff --git a/recipes-core/init-ifupdown/init-ifupdown/interfaces b/recipes-core/init-ifupdown/init-ifupdown/interfaces
index 54959d11..f057ddc0 100644
--- a/recipes-core/init-ifupdown/init-ifupdown/interfaces
+++ b/recipes-core/init-ifupdown/init-ifupdown/interfaces
@@ -1,3 +1,8 @@
+#
+# Copyright (C) 2025 iris-GmbH infrared & intelligent sensors
+#
+# SPDX-License-Identifier: MIT
+#
 # /etc/network/interfaces -- configuration file for ifup(8), ifdown(8)
 
 # The loopback interface