diff --git a/sisr1/tp03-reseaux-prive/srv-admin/interfaces b/sisr1/tp03-reseaux-prive/srv-admin/interfaces
new file mode 100644
index 0000000..abed78e
--- /dev/null
+++ b/sisr1/tp03-reseaux-prive/srv-admin/interfaces
@@ -0,0 +1,20 @@
+# 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
+# This is an autoconfigured IPv6 interface
+auto enp0s3
+iface enp0s3 inet static
+		address 192.168.0.140/24
+		gateway 192.168.0.1
+
+auto enp0s8
+iface enp0s8 inet dhcp
+#		address 172.16.0.254/24
+
diff --git a/sisr1/tp03-reseaux-prive/srv-admin/nat/README.md b/sisr1/tp03-reseaux-prive/srv-admin/nat/README.md
new file mode 100644
index 0000000..2a6a4da
--- /dev/null
+++ b/sisr1/tp03-reseaux-prive/srv-admin/nat/README.md
@@ -0,0 +1,6 @@
+  * **nat.sh** : script activant la NAT dynamique sans filtrage
+    * A placer à /root/nat.sh
+    * Rendre exécutable : <code>chmod +x /root/nat.sh</code>
+  * **nat.service** : service lançant le script au démarrage
+    * A placer à /etc/systemd/system/nat.service
+    * Activer le service : <code>systemctl enable nat.service</code>
\ No newline at end of file
diff --git a/sisr1/tp03-reseaux-prive/srv-admin/nat/nat.service b/sisr1/tp03-reseaux-prive/srv-admin/nat/nat.service
new file mode 100644
index 0000000..8c18dcd
--- /dev/null
+++ b/sisr1/tp03-reseaux-prive/srv-admin/nat/nat.service
@@ -0,0 +1,13 @@
+[Unit]
+ 
+Description=execute /root/nat.sh
+ 
+After=default.target
+ 
+[Service]
+ 
+ExecStart=bash /root/nat.sh
+ 
+[Install]
+ 
+WantedBy=default.target
\ No newline at end of file
diff --git a/sisr1/tp03-reseaux-prive/srv-admin/nat/nat.sh b/sisr1/tp03-reseaux-prive/srv-admin/nat/nat.sh
new file mode 100644
index 0000000..04b2a95
--- /dev/null
+++ b/sisr1/tp03-reseaux-prive/srv-admin/nat/nat.sh
@@ -0,0 +1,6 @@
+#!/bin/bash
+echo "1" > /proc/sys/net/ipv4/ip_forward
+nft add table basic_nat_table
+nft add chain basic_nat_table prerouting {type nat hook prerouting priority 0 \; }
+nft add chain basic_nat_table postrouting {type nat hook postrouting priority 0 \; }
+nft add rule basic_nat_table postrouting masquerade
\ No newline at end of file