Index: /trunk/src/VBox/Devices/Network/slirp/libalias/alias_dns.c
===================================================================
--- /trunk/src/VBox/Devices/Network/slirp/libalias/alias_dns.c	(revision 39775)
+++ /trunk/src/VBox/Devices/Network/slirp/libalias/alias_dns.c	(revision 39776)
@@ -421,4 +421,7 @@
                 }
                 LIST_INSERT_HEAD(&pData->DNSMapHead, pDnsMapping, MapList);
+                LogRel(("NAT: user-defined mapping %s: %RTnaipv4 is registered\n",
+                        pDnsMapping->pszCName ? pDnsMapping->pszCName : pDnsMapping->pszPattern,
+                        pDnsMapping->u32IpAddress));
             }
         }
Index: /trunk/src/VBox/Devices/Network/slirp/slirp.c
===================================================================
--- /trunk/src/VBox/Devices/Network/slirp/slirp.c	(revision 39775)
+++ /trunk/src/VBox/Devices/Network/slirp/slirp.c	(revision 39776)
@@ -2191,4 +2191,7 @@
         }
         LIST_INSERT_HEAD(&pData->DNSMapHead, pDnsMapping, MapList);
+        LogRel(("NAT: user-defined mapping %s: %RTnaipv4 is registered\n",
+                pDnsMapping->pszCName ? pDnsMapping->pszCName : pDnsMapping->pszPattern,
+                pDnsMapping->u32IpAddress));
     }
     LogFlowFuncLeave();