Index: /trunk/src/VBox/Main/src-client/ConsoleImpl2.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/ConsoleImpl2.cpp	(revision 49587)
+++ /trunk/src/VBox/Main/src-client/ConsoleImpl2.cpp	(revision 49588)
@@ -5072,5 +5072,9 @@
                     }
 
-                    if (!networkName.isEmpty())
+                    /*
+                     * NAT networks start their DHCP server theirself, see NATNetwork::Start()
+                     */
+                    if (   !networkName.isEmpty()
+                        && eAttachmentType != NetworkAttachmentType_NATNetwork)
                     {
                         /*