diff --git a/gns3server/modules/dynamips/__init__.py b/gns3server/modules/dynamips/__init__.py
index d26619a1..afd33ff3 100644
--- a/gns3server/modules/dynamips/__init__.py
+++ b/gns3server/modules/dynamips/__init__.py
@@ -137,7 +137,7 @@ class Dynamips(IModule):
         self._projects_dir = kwargs["projects_dir"]
         self._tempdir = kwargs["temp_dir"]
         self._working_dir = self._projects_dir
-        self._host = kwargs["host"]
+        self._host = dynamips_config.get("host", kwargs["host"])
 
         if not sys.platform.startswith("win32"):
             #FIXME: pickle issues Windows
diff --git a/gns3server/modules/iou/__init__.py b/gns3server/modules/iou/__init__.py
index a3f0c47d..f72cf5e9 100644
--- a/gns3server/modules/iou/__init__.py
+++ b/gns3server/modules/iou/__init__.py
@@ -87,11 +87,11 @@ class IOU(IModule):
         IModule.__init__(self, name, *args, **kwargs)
         self._iou_instances = {}
         self._console_start_port_range = iou_config.get("console_start_port_range", 4001)
-        self._console_end_port_range = iou_config.get("console_end_port_range", 4512)
+        self._console_end_port_range = iou_config.get("console_end_port_range", 4500)
         self._allocated_udp_ports = []
         self._udp_start_port_range = iou_config.get("udp_start_port_range", 30001)
-        self._udp_end_port_range = iou_config.get("udp_end_port_range", 40001)
-        self._host = kwargs["host"]
+        self._udp_end_port_range = iou_config.get("udp_end_port_range", 35000)
+        self._host = iou_config.get("host", kwargs["host"])
         self._projects_dir = kwargs["projects_dir"]
         self._tempdir = kwargs["temp_dir"]
         self._working_dir = self._projects_dir
diff --git a/gns3server/modules/virtualbox/__init__.py b/gns3server/modules/virtualbox/__init__.py
index 0ff1bb28..999fdaed 100644
--- a/gns3server/modules/virtualbox/__init__.py
+++ b/gns3server/modules/virtualbox/__init__.py
@@ -93,7 +93,7 @@ class VirtualBox(IModule):
         self._allocated_udp_ports = []
         self._udp_start_port_range = vbox_config.get("udp_start_port_range", 35001)
         self._udp_end_port_range = vbox_config.get("udp_end_port_range", 35500)
-        self._host = kwargs["host"]
+        self._host = vbox_config.get("host", kwargs["host"])
         self._projects_dir = kwargs["projects_dir"]
         self._tempdir = kwargs["temp_dir"]
         self._working_dir = self._projects_dir
diff --git a/gns3server/modules/vpcs/__init__.py b/gns3server/modules/vpcs/__init__.py
index 61de9308..0420175f 100644
--- a/gns3server/modules/vpcs/__init__.py
+++ b/gns3server/modules/vpcs/__init__.py
@@ -81,12 +81,12 @@ class VPCS(IModule):
         # a new process start when calling IModule
         IModule.__init__(self, name, *args, **kwargs)
         self._vpcs_instances = {}
-        self._console_start_port_range = vpcs_config.get("console_start_port_range", 4512)
+        self._console_start_port_range = vpcs_config.get("console_start_port_range", 4501)
         self._console_end_port_range = vpcs_config.get("console_end_port_range", 5000)
         self._allocated_udp_ports = []
-        self._udp_start_port_range = vpcs_config.get("udp_start_port_range", 40001)
-        self._udp_end_port_range = vpcs_config.get("udp_end_port_range", 40512)
-        self._host = kwargs["host"]
+        self._udp_start_port_range = vpcs_config.get("udp_start_port_range", 20501)
+        self._udp_end_port_range = vpcs_config.get("udp_end_port_range", 21000)
+        self._host = vpcs_config.get("host", kwargs["host"])
         self._projects_dir = kwargs["projects_dir"]
         self._tempdir = kwargs["temp_dir"]
         self._working_dir = self._projects_dir