diff --git a/Base/needed.xml b/Base/needed.xml
index 8ef55f2..aea4043 100644
--- a/Base/needed.xml
+++ b/Base/needed.xml
@@ -17,10 +17,16 @@
 	<ConfigFile name="/etc/crans/secrets/secrets.py"/>
       </Group>
     </Group>
+
+    <Package name="resolvconf"/>
   </Group>
 
   <Group name="fstab.local">
     <!-- Autogénération du fstab -->
     <ConfigFile name="/etc/fstab"/>
   </Group>
+
+  <Group name="interfaces.local">
+    <ConfigFile name="/etc/network/interfaces"/>
+  </Group>
 </Base>
diff --git a/Metadata/groups.xml b/Metadata/groups.xml
index 6e28fdc..180e61c 100644
--- a/Metadata/groups.xml
+++ b/Metadata/groups.xml
@@ -428,4 +428,7 @@
   <Group name="fstab.local"
 	 comment="indique l'exsitence de /etc/fstab.local"/>
 
+  <Group name="interfaces.local"
+	 comment="indique l'exsitence de /etc/network/interfaces.local"/>
+
 </Groups>
diff --git a/Probes/interfaces.local b/Probes/interfaces.local
new file mode 100755
index 0000000..1690802
--- /dev/null
+++ b/Probes/interfaces.local
@@ -0,0 +1,10 @@
+#!/bin/bash
+
+if [ ! -f /etc/network/interfaces.local ]; then
+   echo "none"
+   exit 0
+fi
+
+echo "group:interfaces.local"
+
+exec cat /etc/network/interfaces.local
diff --git a/Python/etc/network/interfaces b/Python/etc/network/interfaces
new file mode 100644
index 0000000..2eb4630
--- /dev/null
+++ b/Python/etc/network/interfaces
@@ -0,0 +1,42 @@
+# -*- coding: utf-8; mode: python -*-
+
+include("ip")
+
+header("""
+Les modifications locales sont à mettre dans le fichier /etc/network/interfaces.local
+
+Voir http://wiki.crans.org/CransTechnique/Bcfg2/... pour plus d'explications.
+""")
+
+def dev(interface, mode, additionnals=[]):
+    """Génération de la conf d'une interface:
+
+    - mode est soit pub soit adm
+    - additionnals contient des lignes à mettre en plus à la définition"""
+
+    if mode == "pub":
+        print """auto %(interface)s
+iface %(interface)s inet static
+    address %(ip)s
+    network 138.231.136.0
+    netmask 255.255.248.0
+    broadcast 138.231.143.255
+    gateway 138.231.136.4
+    dns-nameservers 138.231.136.10 138.231.136.3
+    dns-search crans.org""" % { 'interface': interface, 'ip': pubip() }
+    else:
+        print """auto %(interface)s
+iface %(interface)s inet static
+    address %(ip)s
+    network 10.231.136.0
+    netmask 255.255.255.0
+    broadcast 10.231.136.255
+    mtu 1496
+    dns-nameservers 10.231.136.10
+    dns-search adm.crans.org""" % { 'interface': interface, 'ip': admip() }
+
+    for line in additionnals:
+        print "   ", line
+    print
+
+exec metadata.probes["interfaces.local"]