diff --git a/sbin/ifdown b/sbin/ifdown
index 3a1e73a..c9c0779 100644
--- a/sbin/ifdown
+++ b/sbin/ifdown
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) 2003-2011 by Silvan Calarco <silvan.calarco@mambasoft.it>
+# Copyright (c) 2003-2012 by Silvan Calarco <silvan.calarco@mambasoft.it>
 # Copyright (c) 2003-2009 by Davide Madrisan <davide.madrisan@gmail.com>
 
 . /etc/sysconfig/rc
@@ -9,6 +9,8 @@ DEVICE=${1}
 
 [ "${DEVICE}" ] || exit 1
 
+[ "$NM_CONTROLLED" = "0" ] || exit 0
+
 [ -r $network_devices/ifcfg-${DEVICE} ] &&
    . $network_devices/ifcfg-${DEVICE}
 
diff --git a/sbin/ifup b/sbin/ifup
index dc8d5d4..ecbcad8 100644
--- a/sbin/ifup
+++ b/sbin/ifup
@@ -1,5 +1,5 @@
 #!/bin/bash
-# Copyright (c) 2003-2011 by Silvan Calarco <silvan.calarco@mambasoft.it>
+# Copyright (c) 2003-2012 by Silvan Calarco <silvan.calarco@mambasoft.it>
 # Copyright (c) 2003-2009 by Davide Madrisan <davide.madrisan@gmail.com>
 
 . /etc/sysconfig/rc
@@ -13,6 +13,8 @@ DEVICE=${1}
 [ -r /etc/sysconfig/network ] && . /etc/sysconfig/network
 [ -r $network_devices/ifcfg-${DEVICE} ] && . $network_devices/ifcfg-${DEVICE}
 
+[ "$NM_CONTROLLED" = "no" ] || exit 0
+
 [ "$2" = "--udev" -a "$ONBOOT" != "yes" -a "$ONBOOT" != "1" -a "$ONBOOT" != "true" ] \
    && exit 0