--- modif/dhcpd.conf
+++ distrib/dhcpd.conf
@@ -152,6 +152,9 @@ subnet %%subnet[0] netmask %%subnet[1] {
     max-lease-time     %%lease_max;
  %end if
     range %%range_ip[0] %%range_ip[1];
+ %if %%subnets[%%subnet]['ranges'][%%range_ip]['restriction'] == 'oui'
+    deny unknown-clients;
+ %end if
 %end if
 %end for
 }