diff --git a/machines/admin.py b/machines/admin.py
index 8c0ef947..147fca0f 100644
--- a/machines/admin.py
+++ b/machines/admin.py
@@ -54,7 +54,7 @@ class DomainAdmin(VersionAdmin):
     list_display = ('interface_parent', 'name', 'extension', 'cname')
 
 class ServiceAdmin(VersionAdmin):
-    list_display = ('service_type', 'time_regen')
+    list_display = ('service_type', 'min_time_regen', 'regular_time_regen')
 
 admin.site.register(Machine, MachineAdmin)
 admin.site.register(MachineType, MachineTypeAdmin)
diff --git a/machines/migrations/0047_auto_20170809_0606.py b/machines/migrations/0047_auto_20170809_0606.py
new file mode 100644
index 00000000..65cd3d1f
--- /dev/null
+++ b/machines/migrations/0047_auto_20170809_0606.py
@@ -0,0 +1,30 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.7 on 2017-08-09 04:06
+from __future__ import unicode_literals
+
+import datetime
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('machines', '0046_auto_20170808_1423'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='service',
+            name='time_regen',
+        ),
+        migrations.AddField(
+            model_name='service',
+            name='min_time_regen',
+            field=models.DurationField(default=datetime.timedelta(0, 60), help_text='Temps minimal avant nouvelle génération du service'),
+        ),
+        migrations.AddField(
+            model_name='service',
+            name='regular_time_regen',
+            field=models.DurationField(default=datetime.timedelta(0, 3600), help_text='Temps maximal avant nouvelle génération du service'),
+        ),
+    ]
diff --git a/machines/models.py b/machines/models.py
index 69b6f825..bc89e3c6 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -275,7 +275,8 @@ class IpList(models.Model):
 class Service(models.Model):
     """ Definition d'un service (dhcp, dns, etc)"""
     service_type = models.CharField(max_length=255, blank=True, unique=True)
-    time_regen = models.DurationField(default=timedelta(minutes=1))
+    min_time_regen = models.DurationField(default=timedelta(minutes=1), help_text="Temps minimal avant nouvelle génération du service")
+    regular_time_regen = models.DurationField(default=timedelta(hours=1), help_text="Temps maximal avant nouvelle génération du service") 
     servers = models.ManyToManyField('Interface', through='Service_link')
 
     def ask_regen(self):
@@ -320,7 +321,7 @@ class Service_link(models.Model):
 
     def need_regen(self):
         """ Décide si le temps minimal écoulé est suffisant pour provoquer une régénération de service"""
-        if self.asked_regen and (self.last_regen + self.service.time_regen) < timezone.now():
+        if (self.asked_regen and (self.last_regen + self.service.min_time_regen) < timezone.now()) or (self.last_regen + self.service.regular_time_regen) < timezone.now():
             return True
         else:
             return False
diff --git a/machines/templates/machines/aff_service.html b/machines/templates/machines/aff_service.html
index f7f2b3f8..47bfee25 100644
--- a/machines/templates/machines/aff_service.html
+++ b/machines/templates/machines/aff_service.html
@@ -26,7 +26,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
         <thead>
             <tr>
                 <th>Nom du service</th>
-                <th>Temps minimum de régénération</th>
+                <th>Temps minimum avant nouvelle régénération</th>
+                <th>Temps avant nouvelle génération obligatoire (max)</th>
                 <th>Serveurs inclus</th>
 		<th></th>
                 <th></th>
@@ -35,7 +36,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
         {% for service in service_list %}
         <tr>
             <td>{{ service.service_type }}</td>
-            <td>{{ service.time_regen }}</td>
+            <td>{{ service.min_time_regen }}</td>
+            <td>{{ service.regular_time_regen }}</td>
 	    <td>{% for serv in service.servers.all %}{{ serv }}, {% endfor %}</td>
             <td class="text-right">
             {% if is_infra %}
diff --git a/machines/views.py b/machines/views.py
index f3a77d9e..a6c63d4e 100644
--- a/machines/views.py
+++ b/machines/views.py
@@ -816,9 +816,9 @@ def service_servers(request):
 @login_required
 @permission_required('serveur')
 def regen_achieved(request):
-    obj = Service_link.objects.filter(service__in=Service.objects.filter(service_type=request.POST['service']), server__in=Interface.objects.filter(domain=Domain.objects.filter(name=request.POST['server'])))
+    obj = Service_link.objects.filter(service__in=Service.objects.filter(service_type=request.POST['service']), server__in=Interface.objects.filter(domain__in=Domain.objects.filter(name=request.POST['server'])))
     if obj:
-        obj[0].done_regen()
+        obj.first().done_regen()
     return HttpReponse("Ok")
 
 @csrf_exempt