diff --git a/gns3server/handlers/jsonrpc_websocket.py b/gns3server/handlers/jsonrpc_websocket.py
index acc56893..32f8c9da 100644
--- a/gns3server/handlers/jsonrpc_websocket.py
+++ b/gns3server/handlers/jsonrpc_websocket.py
@@ -140,6 +140,11 @@ class JSONRPCWebSocket(tornado.websocket.WebSocketHandler):
                 # This is a notification, silently ignore this error...
                 return
 
+        if method.startswith("builtin"):
+            log.info("calling built-in method {}".format(method))
+            self.destinations[method]()
+            return
+
         module = self.destinations[method]
         # ZMQ requests are encoded in JSON
         # format is a JSON array: [session ID, JSON-RPC request]
diff --git a/gns3server/modules/base.py b/gns3server/modules/base.py
index 7cece337..70c45cd9 100644
--- a/gns3server/modules/base.py
+++ b/gns3server/modules/base.py
@@ -113,6 +113,8 @@ class IModule(multiprocessing.Process):
         signals = [signal.SIGTERM, signal.SIGINT]
         if not sys.platform.startswith("win"):
             signals.extend([signal.SIGHUP, signal.SIGQUIT])
+        else:
+            signals.extend([signal.SIGBREAK])
         for sig in signals:
             signal.signal(sig, signal_handler)
 
diff --git a/gns3server/modules/dynamips/__init__.py b/gns3server/modules/dynamips/__init__.py
index 9dd43667..dc8bdc6c 100644
--- a/gns3server/modules/dynamips/__init__.py
+++ b/gns3server/modules/dynamips/__init__.py
@@ -127,6 +127,8 @@ class Dynamips(IModule):
         Properly stops the module.
         """
 
+        #if not sys.platform.startswith("win32"):
+        #    self._callback.stop()
         if self._hypervisor_manager:
             self._hypervisor_manager.stop_all_hypervisors()
         IModule.stop(self)  # this will stop the I/O loop
diff --git a/gns3server/modules/iou/__init__.py b/gns3server/modules/iou/__init__.py
index 9ab032a1..49f62864 100644
--- a/gns3server/modules/iou/__init__.py
+++ b/gns3server/modules/iou/__init__.py
@@ -95,6 +95,7 @@ class IOU(IModule):
         Properly stops the module.
         """
 
+        #self._iou_callback.stop()
         # delete all IOU instances
         for iou_id in self._iou_instances:
             iou_instance = self._iou_instances[iou_id]
diff --git a/gns3server/server.py b/gns3server/server.py
index 990fe380..f7255dc3 100644
--- a/gns3server/server.py
+++ b/gns3server/server.py
@@ -107,6 +107,9 @@ class Server(object):
         #     instance.start()  # starts the new process
         #=======================================================================
 
+        # special built-in destination to stop the server
+        JSONRPCWebSocket.register_destination("builtin.stop", self._cleanup)
+
         for module in MODULES:
             instance = module(module.__name__.lower(),
                               "127.0.0.1",  # ZeroMQ server address
@@ -151,6 +154,8 @@ class Server(object):
         signals = [signal.SIGTERM, signal.SIGINT]
         if not sys.platform.startswith("win"):
             signals.extend([signal.SIGHUP, signal.SIGQUIT])
+        else:
+            signals.extend([signal.SIGBREAK])
         for sig in signals:
             signal.signal(sig, signal_handler)