diff --git a/sisr1/tp01-nat-dhcp/cartes_reseau/interfaces b/sisr1/tp01-nat-dhcp/cartes_reseau/interfaces
new file mode 100644
index 0000000..4d69872
--- /dev/null
+++ b/sisr1/tp01-nat-dhcp/cartes_reseau/interfaces
@@ -0,0 +1,24 @@
+# This file describes the network interfaces available on your system
+# and how to activate them. For more information, see interfaces(5).
+
+source /etc/network/interfaces.d/*
+
+# The loopback network interface
+auto lo
+iface lo inet loopback
+
+# The primary network interface
+allow-hotplug enp0s3
+iface enp0s3 inet dhcp
+
+#assignation static IP adresse 
+#auto enp0s3
+#iface enp0s3 inet static 
+        #address 192.168.0.27/24
+         #gateway 192.168.0.1
+          
+#the secondary network interfaces 
+auto enp0s8
+iface enp0s8 inet static 
+	address 192.168.2.1/24
+	gateway 192.168.2.1