diff --git a/clusters/preventive-measure.json b/clusters/preventive-measure.json
index f8fb4d9..a004cf2 100644
--- a/clusters/preventive-measure.json
+++ b/clusters/preventive-measure.json
@@ -297,7 +297,20 @@
       },
       "uuid": "3e7a7fb5-8db2-4033-8f4f-d76721819765",
       "value": "ACL"
+    },
+    {
+      "description": "Limit access to a service by network/packet filtering the access to",
+      "meta": {
+        "complexity": "Low",
+        "effectiveness": "Medium",
+        "impact": "Low",
+        "refs": [
+          "https://en.wikipedia.org/wiki/Firewall_(computing)"
+        ]
+      },
+      "uuid": "19c98fa6-45f7-47cc-830d-2d4f39301b06",
+      "value": "Packet filtering"
     }
   ],
-  "version": 3
+  "version": 4
 }