diff --git a/gestion/ipt.py b/gestion/ipt.py
index 919fcd55..70ca4d7c 100644
--- a/gestion/ipt.py
+++ b/gestion/ipt.py
@@ -169,7 +169,7 @@ ACCEPT' % (dev, proto, ip, port))
     def blacklist(self, machine):
         ''' Met des règles empêchant toute communication
         vers et à partir de la machine considérée '''
-        ident = int(machine.id())
+        ident = int(machine.rid())
         ip = ""
         for type_m, plages in rid_primaires.iteritems():
             if type_m in ['special']:
@@ -180,9 +180,11 @@ ACCEPT' % (dev, proto, ip, port))
                     mac=machine.mac()
                     break
 
+        self.filter.blacklist_src('-m mac --mac-source %s -j REJECT --reject-with icmp6-port-unreachable' % mac)
         if ip:
-            self.filter.blacklist_src('-m mac --mac-source %s -j REJECT --reject-with icmp6-port-unreachable' % mac)
             self.filter.blacklist_dst('-d %s -j REJECT --reject-with icmp6-adm-prohibited' % ip)
+        else:
+            print "Ipv6 de la machine %s impossible à calculer" % machine.nom()
 
 
     def version(self):
@@ -774,6 +776,7 @@ def blacklist(ipt):
     if ipt.filter.blacklist_dst.items:
         ipt.filter.blacklist_dst.items[:] = []
 
+    print "%s machines blacklistées" % len(blcklst)
     for machine in blcklst:
         ipt.blacklist(machine)