diff --git a/machines/migrations/0012_auto_20160704_0118.py b/machines/migrations/0012_auto_20160704_0118.py
new file mode 100644
index 00000000..e33b5fe1
--- /dev/null
+++ b/machines/migrations/0012_auto_20160704_0118.py
@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('machines', '0011_auto_20160704_0105'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='interface',
+            name='dns',
+            field=models.CharField(max_length=255, help_text='Obligatoire et unique', unique=True),
+        ),
+    ]
diff --git a/machines/views.py b/machines/views.py
index b89e9e71..50cbe197 100644
--- a/machines/views.py
+++ b/machines/views.py
@@ -8,9 +8,30 @@ from django.template import Context, RequestContext, loader
 from django.contrib import messages
 
 from .models import NewMachineForm, EditMachineForm, EditInterfaceForm, AddInterfaceForm, NewInterfaceForm
-from .models import Machine, Interface
+from .models import Machine, Interface, IpList
 from users.models import User
 
+def unassign_ip(machine):
+    machine.ipv4 = None
+    machine.save()
+
+def unassign_ips(user):
+    machines = Interface.objects.filter(machine=Machine.objects.filter(user=user))
+    for machine in machines:
+        unassign_ip(machine)
+    return
+
+def free_ip():
+    """ Renvoie la liste des ip disponibles """
+    return IpList.objects.filter(interface__isnull=True)
+
+def assign_ipv4(interface):
+    """ Assigne une ip à l'interface """
+    free_ips = free_ip()
+    if free_ips:
+        interface.ipv4 = free_ips[0]
+    return interface
+
 def form(ctx, template, request):
     c = ctx
     c.update(csrf(request))
@@ -30,6 +51,10 @@ def new_machine(request, userid):
         new_machine.save()
         new_interface = interface.save(commit=False)
         new_interface.machine = new_machine
+        if free_ip():
+            new_interface = assign_ipv4(new_interface)
+        else:
+            messages.error(request, u"Il n'y a plus d'ip disponibles")
         new_interface.save()
         messages.success(request, "La machine a été crée")
         return redirect("/users/")
diff --git a/users/models.py b/users/models.py
index 27c7963e..c30e4a68 100644
--- a/users/models.py
+++ b/users/models.py
@@ -110,7 +110,6 @@ class StateForm(ModelForm):
         model = User
         fields = ['state']
 
-
 class SchoolForm(ModelForm):
     class Meta:
         model = School
diff --git a/users/views.py b/users/views.py
index 813f1fdc..1d51006a 100644
--- a/users/views.py
+++ b/users/views.py
@@ -15,9 +15,15 @@ from machines.models import Machine, Interface
 from users.forms  import PassForm
 from search.models import SearchForm
 from cotisations.views import is_adherent, end_adhesion
+from machines.views import unassign_ips
 
 from re2o.login import makeSecret, hashNT
 
+def archive(user):
+    """ Archive un utilisateur """
+    unassign_ips(user)
+    return
+
 def end_ban(user):
     """ Renvoie la date de fin de ban d'un user, False sinon """
     date_max = Ban.objects.all().filter(user=user).aggregate(Max('date_end'))['date_end__max']
@@ -72,12 +78,15 @@ def state(request, userid):
     except User.DoesNotExist:
         messages.error(request, u"Utilisateur inexistant" )
         return redirect("/users/")
-    user = StateForm(request.POST or None, instance=user)
-    if user.is_valid():
-        user.save()
+    state = StateForm(request.POST or None, instance=user)
+    if state.is_valid():
+        if state.has_changed():
+            if state.cleaned_data['state'] == User.STATE_ARCHIVED:
+                archive(user)
+        state.save()
         messages.success(request, "Etat changé avec succès")
         return redirect("/users/")
-    return form({'userform': user}, 'users/user.html', request)
+    return form({'userform': state}, 'users/user.html', request)
 
 def password(request, userid):
     try: