diff --git a/ipv4natandcgnat.dot b/ipv4natandcgnat.dot
new file mode 100644
index 0000000..4aa0a54
--- /dev/null
+++ b/ipv4natandcgnat.dot
@@ -0,0 +1,16 @@
+digraph G {
+    node [ shape=box ]
+    rankdir=LR;
+
+    client1 [ label="IPv4 client 1\nPrivate IP" ];
+    client2 [ label="IPv4 client 2\nPrivate IP" ];
+
+    nat_gw  [ label="NAT gateway\nPublic IP"  ];
+    cgnat1  [ label="CGNAT gateway\nPrivate IP"  ];
+    cgnat2  [ label="CGNAT gateway\nPublic IP"  ];
+    target  [ label="The Internet\nPublic IP" ];
+
+
+    client1->nat_gw->target;
+    client2->cgnat1->cgnat2->target;
+}