diff --git a/data/grid5000/sites/louvain/servers/nat.json b/data/grid5000/sites/louvain/servers/nat.json
new file mode 100644
index 0000000000000000000000000000000000000000..f27431030ac8ea0859012a03409518910ecae406
--- /dev/null
+++ b/data/grid5000/sites/louvain/servers/nat.json
@@ -0,0 +1,13 @@
+{
+  "alias": [
+    "access"
+  ],
+  "kind": "virtual",
+  "network_adapters": {
+    "default": {
+      "ip": "172.16.223.200"
+    }
+  },
+  "type": "server",
+  "uid": "nat"
+}
\ No newline at end of file
diff --git a/input/grid5000/sites/louvain/servers/virtual.yaml b/input/grid5000/sites/louvain/servers/virtual.yaml
index 81117f99fe26e629233f14c0efa4a4dc614bfcc4..96f52a9b8e45a18e4e7924085f6b7db2755129a0 100644
--- a/input/grid5000/sites/louvain/servers/virtual.yaml
+++ b/input/grid5000/sites/louvain/servers/virtual.yaml
@@ -139,3 +139,10 @@ kavlan-agent:
   network_adapters:
     default:
       ip: 172.16.223.125
+
+nat:
+  kind: virtual
+  alias: [access]
+  network_adapters:
+    default:
+      ip: 172.16.223.200