diff --git a/machines/models.py b/machines/models.py
index 7d083e09..a638bb47 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -3,6 +3,7 @@ from django.db.models.signals import post_save, post_delete
 from django.dispatch import receiver
 from django.forms import ValidationError
 from macaddress.fields import MACAddressField
+from netaddr import EUI
 
 from re2o.settings import MAIN_EXTENSION
 
@@ -61,6 +62,9 @@ class Interface(models.Model):
         user = self.machine.user
         return machine.active and user.has_access()
 
+    def clean(self, *args, **kwargs):
+        self.mac_address = str(EUI(self.mac_address)) or None
+
     def __str__(self):
         return self.dns
 
diff --git a/machines/views.py b/machines/views.py
index ddfb4531..d33c30ba 100644
--- a/machines/views.py
+++ b/machines/views.py
@@ -122,7 +122,7 @@ def edit_interface(request, interfaceid):
         messages.error(request, u"Interface inexistante" )
         return redirect("/machines")
     if not request.user.has_perms(('infra',)):
-        if interface.machine.user != request.user:
+        if not request.user.has_perms(('cableur',)) and interface.machine.user != request.user:
             messages.error(request, "Vous ne pouvez pas éditer une machine d'un autre user que vous sans droit")
             return redirect("/users/profil/" + str(request.user.id))
         machine_form = BaseEditMachineForm(request.POST or None, instance=interface.machine)