--- Customization.pm.orig	2017-07-27 20:21:04.259828942 +0200
+++ Customization.pm.new	2017-07-27 20:21:35.559476473 +0200
@@ -756,17 +756,17 @@
    if (! defined $ifcfgResult) {
       $ifcfgResult = Utils::ExecuteCommand('/sbin/ifconfig -a');
    }
+  
+   my @interfaces = split/\n\n/, $ifcfgResult;
 
-   my $result = undef;
-
-   my $macAddressValid = ($macAddress =~ /^([0-9a-f]{2}:){5}[0-9a-f]{2}$/i);
-
-   if ($macAddressValid &&
-      ($ifcfgResult =~ /^\s*(\w+?)(:\w*)?\s+.*?$macAddress/mi)) {
-      $result = $1;
+   foreach my $interface (@interfaces) {
+      if ($interface =~ /$macAddress/) {
+	      print($interface);
+          if ($interface =~ m/^(\w+)(:|\s)/) {
+              return $1;
+          }
+      }
    }
-
-   return $result;
 }
 
 sub GetInterfaceByMacAddressIPAddrShow