diff --git a/api/serializers.py b/api/serializers.py
index d4e50702..a4fa57bc 100644
--- a/api/serializers.py
+++ b/api/serializers.py
@@ -829,6 +829,25 @@ class DNSZonesSerializer(serializers.ModelSerializer):
                   'aaaa_records', 'cname_records', 'sshfp_records')
 
 
+class DNSReverseZonesSerializer(serializers.ModelSerializer):
+    """Serialize the data about DNS Zones.
+    """
+    soa = SOARecordSerializer(source='extension.soa')
+    extension = serializers.CharField(source='extension.name', read_only=True)
+    cidrs = serializers.ListField(child=serializers.CharField(), source='ip_set_cidrs_as_str', read_only=True)
+    ns_records = NSRecordSerializer(many=True, source='extension.ns_set')
+    mx_records = MXRecordSerializer(many=True, source='extension.mx_set')
+    txt_records = TXTRecordSerializer(many=True, source='extension.txt_set')
+    ptr_records = ARecordSerializer(many=True, source='get_associated_ptr_records')
+    ptr_v6_records = AAAARecordSerializer(many=True, source='get_associated_ptr_v6_records')
+
+
+    class Meta:
+        model = machines.IpType
+        fields = ('type', 'extension', 'soa', 'ns_records', 'mx_records',
+                  'txt_records', 'ptr_records', 'ptr_v6_records', 'cidrs',
+                  'prefix_v6')
+
 # MAILING
 
 
diff --git a/api/urls.py b/api/urls.py
index 15a19d59..3bcaee0e 100644
--- a/api/urls.py
+++ b/api/urls.py
@@ -105,6 +105,7 @@ router.register_view(r'localemail/users', views.LocalEmailUsersView),
 router.register_view(r'firewall/subnet-ports', views.SubnetPortsOpenView),
 # DNS
 router.register_view(r'dns/zones', views.DNSZonesView),
+router.register_view(r'dns/reverse-zones', views.DNSReverseZonesView),
 # MAILING
 router.register_view(r'mailing/standard', views.StandardMailingView),
 router.register_view(r'mailing/club', views.ClubMailingView),
diff --git a/api/views.py b/api/views.py
index f84903e6..f284abbe 100644
--- a/api/views.py
+++ b/api/views.py
@@ -561,6 +561,15 @@ class DNSZonesView(generics.ListAPIView):
                 .all())
     serializer_class = serializers.DNSZonesSerializer
 
+class DNSReverseZonesView(generics.ListAPIView):
+    """Exposes the detailed information about each extension (hostnames, 
+    IPs, DNS records, etc.) in order to build the DNS zone files.
+    """
+    queryset = (machines.IpType.objects.all())
+    serializer_class = serializers.DNSReverseZonesSerializer
+
+
+
 
 # MAILING
 
diff --git a/machines/forms.py b/machines/forms.py
index ecffcc71..49150349 100644
--- a/machines/forms.py
+++ b/machines/forms.py
@@ -218,7 +218,9 @@ class IpTypeForm(FormRevMixin, ModelForm):
     class Meta:
         model = IpType
         fields = ['type', 'extension', 'need_infra', 'domaine_ip_start',
-                  'domaine_ip_stop', 'prefix_v6', 'vlan', 'ouverture_ports']
+                  'domaine_ip_stop', 'dnssec_reverse_v4', 'prefix_v6',
+                  'prefix_v6_length','dnssec_reverse_v6', 'vlan',
+                  'ouverture_ports']
 
     def __init__(self, *args, **kwargs):
         prefix = kwargs.pop('prefix', self.Meta.model.__name__)
@@ -230,7 +232,8 @@ class EditIpTypeForm(IpTypeForm):
     """Edition d'un iptype. Pas d'edition du rangev4 possible, car il faudrait
     synchroniser les objets iplist"""
     class Meta(IpTypeForm.Meta):
-        fields = ['extension', 'type', 'need_infra', 'prefix_v6', 'vlan',
+        fields = ['extension', 'type', 'need_infra', 'prefix_v6', 'prefix_v6_length',
+                  'vlan', 'dnssec_reverse_v4', 'dnssec_reverse_v6',
                   'ouverture_ports']
 
 
diff --git a/machines/migrations/0087_dnssec.py b/machines/migrations/0087_dnssec.py
new file mode 100644
index 00000000..cc2a25ec
--- /dev/null
+++ b/machines/migrations/0087_dnssec.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.7 on 2018-06-25 15:06
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('machines', '0086_role'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='iptype',
+            name='dnssec_reverse_v4',
+            field=models.BooleanField(default=False, help_text='Activer DNSSEC sur le reverse DNS IPv4'),
+        ),
+        migrations.AddField(
+            model_name='iptype',
+            name='dnssec_reverse_v6',
+            field=models.BooleanField(default=False, help_text='Activer DNSSEC sur le reverse DNS IPv6'),
+        ),
+    ]
diff --git a/machines/migrations/0088_iptype_prefix_v6_length.py b/machines/migrations/0088_iptype_prefix_v6_length.py
new file mode 100644
index 00000000..e061167c
--- /dev/null
+++ b/machines/migrations/0088_iptype_prefix_v6_length.py
@@ -0,0 +1,21 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.7 on 2018-07-16 18:46
+from __future__ import unicode_literals
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('machines', '0087_dnssec'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='iptype',
+            name='prefix_v6_length',
+            field=models.IntegerField(default=64, validators=[django.core.validators.MaxValueValidator(128), django.core.validators.MinValueValidator(0)]),
+        ),
+    ]
diff --git a/machines/models.py b/machines/models.py
index e981bf10..2f5a6a62 100644
--- a/machines/models.py
+++ b/machines/models.py
@@ -41,8 +41,8 @@ from django.dispatch import receiver
 from django.forms import ValidationError
 from django.utils.functional import cached_property
 from django.utils import timezone
-from django.core.validators import MaxValueValidator
 from django.utils.translation import ugettext_lazy as _l
+from django.core.validators import MaxValueValidator, MinValueValidator
 
 from macaddress.fields import MACAddressField
 
@@ -256,11 +256,26 @@ class IpType(RevMixin, AclMixin, models.Model):
     need_infra = models.BooleanField(default=False)
     domaine_ip_start = models.GenericIPAddressField(protocol='IPv4')
     domaine_ip_stop = models.GenericIPAddressField(protocol='IPv4')
+    dnssec_reverse_v4 = models.BooleanField(
+            default=False, 
+            help_text="Activer DNSSEC sur le reverse DNS IPv4",
+    )
     prefix_v6 = models.GenericIPAddressField(
         protocol='IPv6',
         null=True,
         blank=True
     )
+    prefix_v6_length = models.IntegerField(
+        default=64,
+        validators=[
+            MaxValueValidator(128),
+            MinValueValidator(0)
+        ]
+        )
+    dnssec_reverse_v6 = models.BooleanField(
+            default=False,
+            help_text="Activer DNSSEC sur le reverse DNS IPv6",
+    )
     vlan = models.ForeignKey(
         'Vlan',
         on_delete=models.PROTECT,
@@ -294,6 +309,33 @@ class IpType(RevMixin, AclMixin, models.Model):
         """ Renvoie une liste des ip en string"""
         return [str(x) for x in self.ip_set]
 
+    @cached_property
+    def ip_set_full_info(self):
+        """Iter sur les range cidr, et renvoie network, broacast , etc"""
+        return [
+            {
+                'network': str(ip_set.network),
+                'netmask': str(ip_set.netmask),
+                'netmask_cidr': str(ip_set.prefixlen),
+                'broadcast': str(ip_set.broadcast),
+                'vlan': str(self.vlan),
+                'vlan_id': self.vlan.vlan_id
+            } for ip_set in self.ip_set.iter_cidrs()
+        ]
+
+    @cached_property
+    def ip6_set_full_info(self):
+        if self.prefix_v6:
+            return {
+                'network' : str(self.prefix_v6),
+                'netmask' : 'ffff:ffff:ffff:ffff::',
+                'netmask_cidr' : str(self.prefix_v6_length),
+                'vlan': str(self.vlan),
+                'vlan_id': self.vlan.vlan_id
+            }
+        else:
+            return None
+
     def ip_objects(self):
         """ Renvoie tous les objets ipv4 relié à ce type"""
         return IpList.objects.filter(ip_type=self)
@@ -345,6 +387,17 @@ class IpType(RevMixin, AclMixin, models.Model):
             ):
                 ipv6.check_and_replace_prefix(prefix=self.prefix_v6)
 
+    def get_associated_ptr_records(self):
+        from re2o.utils import all_active_assigned_interfaces
+        return (all_active_assigned_interfaces()
+                .filter(type__ip_type=self)
+                .filter(ipv4__isnull=False))
+
+    def get_associated_ptr_v6_records(self):
+        from re2o.utils import all_active_interfaces
+        return (all_active_interfaces(full=True)
+                .filter(type__ip_type=self))
+
     def clean(self):
         """ Nettoyage. Vérifie :
         - Que ip_stop est après ip_start
diff --git a/machines/templates/machines/aff_iptype.html b/machines/templates/machines/aff_iptype.html
index fa2a2767..7d4de6c5 100644
--- a/machines/templates/machines/aff_iptype.html
+++ b/machines/templates/machines/aff_iptype.html
@@ -34,11 +34,11 @@ with this program; if not, write to the Free Software Foundation, Inc.,
                 <th>Extension</th>
                 <th>Nécessite l'autorisation infra</th>
                 <th>Plage ipv4</th>
-                <th>Préfixe v6</th>
+		<th>Préfixe v6</th>
+		<th>DNSSEC reverse v4/v6</th>
                 <th>Sur vlan</th>
                 <th>Ouverture ports par défault</th>
                 <th></th>
-                <th></th>
             </tr>
         </thead>
         {% for type in iptype_list %}
@@ -46,8 +46,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
             <td>{{ type.type }}</td>
             <td>{{ type.extension }}</td>
             <td>{{ type.need_infra|tick }}</td>
-            <td>{{ type.domaine_ip_start }}-{{ type.domaine_ip_stop }}</td>
-            <td>{{ type.prefix_v6 }}</td>
+	    <td>{{ type.domaine_ip_start }}-{{ type.domaine_ip_stop }}</td>
+            <td>{{ type.prefix_v6 }}/{{ type.prefix_v6_length }}</td>
+	    <td>{{ type.dnssec_reverse_v4|tick }}/{{ type.dnssec_reverse_v6|tick }}</td>
             <td>{{ type.vlan }}</td>
             <td>{{ type.ouverture_ports }}</td>
             <td class="text-right">
diff --git a/machines/templates/machines/aff_txt.html b/machines/templates/machines/aff_txt.html
index 27d78d11..e961d7a9 100644
--- a/machines/templates/machines/aff_txt.html
+++ b/machines/templates/machines/aff_txt.html
@@ -34,7 +34,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
             <th></th>
         </tr>
     </thead>
-    {% for txt in txt_list %}
+    {% for txt in text_list %}
     <tr>
         <td>{{ txt.zone }}</td>
         <td>{{ txt.dns_entry }}</td>