diff --git a/ethernet_restreint/config_interface.sh b/ethernet_restreint/config_interface.sh
new file mode 100755
index 0000000..0bf5133
--- /dev/null
+++ b/ethernet_restreint/config_interface.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+
+add_bridge() {
+    echo "add bridge interface ${bridge}"
+    ip link add ${bridge} type bridge
+
+    # authorise qemu to use as interface ${bridge} as bridge
+    if cat /etc/qemu/bridge.conf | grep -q "${bridge}"
+    then
+        echo "bridge already authorised by qemu"
+    else
+        echo "allow ${bridge}" | tee -a /etc/qemu/bridge.conf
+        echo "entry added to /etc/qemu/bridge.conf"
+    fi
+
+    echo "activate bridge ${bridge}"
+    ip link set dev ${bridge} up
+}
+
+
+ip link add br0 type bridge
+ip link set dev tap0 master br0
+ip address delete 10.0.2.100/24 dev tap0
+ip address add 10.0.2.100/24 dev br0
+ip link set dev br0 up
+ip route add default via 10.0.2.0 dev br0
+
+bridge="br1"
+add_bridge
+
+bridge="br2"
+add_bridge
+
diff --git a/ethernet_restreint/enter_ethernet_restreint.sh b/ethernet_restreint/enter_ethernet_restreint.sh
new file mode 100755
index 0000000..e84c446
--- /dev/null
+++ b/ethernet_restreint/enter_ethernet_restreint.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+#
+
+#echo $$ > /tmp/pid
+#unshare --user --map-root-user --net --mount
+#slirp4netns
+
+rootlesskit --net=slirp4netns --copy-up=/etc bash
diff --git a/vm-start.sh b/vm-start.sh
index 88fa138..6219da9 100755
--- a/vm-start.sh
+++ b/vm-start.sh
@@ -50,7 +50,8 @@ then
 fi
 
 OPTION="-display gtk \
-    -usbdevice tablet"
+    -usbdevice tablet \
+    -daemonize"
 
         # other options choices
         #