diff --git a/docs/api/examples/delete_vpcsvpcsidportsportidnio.txt b/docs/api/examples/delete_vpcsvpcsidportsportidnio.txt
new file mode 100644
index 00000000..37bc3fda
--- /dev/null
+++ b/docs/api/examples/delete_vpcsvpcsidportsportidnio.txt
@@ -0,0 +1,15 @@
+curl -i -xDELETE 'http://localhost:8000/vpcs/{vpcs_id}/ports/{port_id}/nio'
+
+DELETE /vpcs/{vpcs_id}/ports/{port_id}/nio HTTP/1.1
+
+
+
+HTTP/1.1 200
+CONNECTION: close
+CONTENT-LENGTH: 2
+CONTENT-TYPE: application/json
+DATE: Thu, 08 Jan 2015 16:09:15 GMT
+SERVER: Python/3.4 aiohttp/0.13.1
+X-ROUTE: /vpcs/{vpcs_id}/ports/{port_id}/nio
+
+{}
diff --git a/docs/api/examples/post_vpcsvpcsidportsportidnio.txt b/docs/api/examples/post_vpcsvpcsidportsportidnio.txt
new file mode 100644
index 00000000..06fbc0fb
--- /dev/null
+++ b/docs/api/examples/post_vpcsvpcsidportsportidnio.txt
@@ -0,0 +1,25 @@
+curl -i -xPOST 'http://localhost:8000/vpcs/{vpcs_id}/ports/{port_id}/nio' -d '{"lport": 4242, "rhost": "127.0.0.1", "rport": 4343, "type": "nio_udp"}'
+
+POST /vpcs/{vpcs_id}/ports/{port_id}/nio HTTP/1.1
+{
+    "lport": 4242,
+    "rhost": "127.0.0.1",
+    "rport": 4343,
+    "type": "nio_udp"
+}
+
+
+HTTP/1.1 200
+CONNECTION: close
+CONTENT-LENGTH: 89
+CONTENT-TYPE: application/json
+DATE: Thu, 08 Jan 2015 16:09:15 GMT
+SERVER: Python/3.4 aiohttp/0.13.1
+X-ROUTE: /vpcs/{vpcs_id}/ports/{port_id}/nio
+
+{
+    "lport": 4242,
+    "rhost": "127.0.0.1",
+    "rport": 4343,
+    "type": "nio_udp"
+}
diff --git a/docs/api/sleep.rst b/docs/api/sleep.rst
deleted file mode 100644
index fbf7845d..00000000
--- a/docs/api/sleep.rst
+++ /dev/null
@@ -1,13 +0,0 @@
-/sleep
-------------------------------
-
-.. contents::
-
-GET /sleep
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-
-Response status codes
-**************************
-- **200**: OK
-
diff --git a/docs/api/stream.rst b/docs/api/stream.rst
deleted file mode 100644
index 00180c62..00000000
--- a/docs/api/stream.rst
+++ /dev/null
@@ -1,13 +0,0 @@
-/stream
-------------------------------
-
-.. contents::
-
-GET /stream
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-
-Response status codes
-**************************
-- **200**: OK
-
diff --git a/docs/conf.py b/docs/conf.py
index 346e586a..73bef3c9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -90,6 +90,7 @@ exclude_patterns = ['_build']
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
 
+
 # A list of ignored prefixes for module index sorting.
 # modindex_common_prefix = []
 
@@ -102,6 +103,10 @@ pygments_style = 'sphinx'
 # The theme to use for HTML and HTML Help pages.  See the documentation for
 # a list of builtin themes.
 html_theme = 'default'
+#html_theme = 'nature'
+
+#If uncommented it's turn off the default read the doc style
+html_style = "/default.css"
 
 # Theme options are theme-specific and customize the look and feel of a theme
 # further.  For a list of options available for each theme, see the
@@ -162,7 +167,7 @@ html_static_path = ['_static']
 # html_split_index = False
 
 # If true, links to the reST sources are added to the pages.
-# html_show_sourcelink = True
+html_show_sourcelink = False
 
 # If true, "Created using Sphinx" is shown in the HTML footer. Default is True.
 # html_show_sphinx = True
diff --git a/gns3server/handlers/vpcs_handler.py b/gns3server/handlers/vpcs_handler.py
index 86d97144..4719f0b0 100644
--- a/gns3server/handlers/vpcs_handler.py
+++ b/gns3server/handlers/vpcs_handler.py
@@ -18,7 +18,7 @@
 from ..web.route import Route
 from ..schemas.vpcs import VPCS_CREATE_SCHEMA
 from ..schemas.vpcs import VPCS_OBJECT_SCHEMA
-from ..schemas.vpcs import VPCS_ADD_NIO_SCHEMA
+from ..schemas.vpcs import VPCS_NIO_SCHEMA
 from ..modules.vpcs import VPCS
 
 
@@ -53,6 +53,7 @@ class VPCSHandler(object):
         },
         status_codes={
             204: "VPCS instance started",
+            404: "VPCS instance doesn't exist"
         },
         description="Start a VPCS instance")
     def create(request, response):
@@ -68,7 +69,8 @@ class VPCSHandler(object):
             "id": "VPCS instance ID"
         },
         status_codes={
-            201: "Success of stopping VPCS",
+            204: "VPCS instance stopped",
+            404: "VPCS instance doesn't exist"
         },
         description="Stop a VPCS instance")
     def create(request, response):
@@ -77,44 +79,42 @@ class VPCSHandler(object):
         yield from vpcs_manager.stop_vm(int(request.match_info["id"]))
         response.json({})
 
-    @classmethod
-    @Route.get(
-        r"/vpcs/{id:\d+}",
-        parameters={
-            "id": "VPCS instance ID"
-        },
-        description="Get information about a VPCS",
-        output=VPCS_OBJECT_SCHEMA)
-    def show(request, response):
-
-        response.json({'name': "PC 1", "id": 42, "console": 4242})
-
-    @classmethod
-    @Route.put(
-        r"/vpcs/{id:\d+}",
-        parameters={
-            "id": "VPCS instance ID"
-        },
-        description="Update VPCS information",
-        input=VPCS_OBJECT_SCHEMA,
-        output=VPCS_OBJECT_SCHEMA)
-    def update(request, response):
-
-        response.json({'name': "PC 1", "id": 42, "console": 4242})
-
-    @classmethod
     @Route.post(
-        r"/vpcs/{id:\d+}/nio",
+        r"/vpcs/{id:\d+}/ports/{port_id}/nio",
         parameters={
-            "id": "VPCS instance ID"
+            "id": "VPCS instance ID",
+            "port_id": "Id of the port where the nio should be add"
         },
         status_codes={
             201: "NIO created",
-            409: "Conflict"
+            404: "VPCS instance doesn't exist"
         },
-        description="ADD NIO to a VPCS",
-        input=VPCS_ADD_NIO_SCHEMA)
+        description="Add a NIO to a VPCS",
+        input=VPCS_NIO_SCHEMA,
+        output=VPCS_NIO_SCHEMA)
     def create_nio(request, response):
 
-        # TODO: raise 404 if VPCS not found
-        response.json({'name': "PC 2", "id": 42, "console": 4242})
+        vpcs_manager = VPCS.instance()
+        vm = vpcs_manager.get_vm(int(request.match_info["id"]))
+        nio = vm.port_add_nio_binding(int(request.match_info["port_id"]), request.json)
+
+        response.json(nio)
+
+    @classmethod
+    @Route.delete(
+        r"/vpcs/{id:\d+}/ports/{port_id}/nio",
+        parameters={
+            "id": "VPCS instance ID",
+            "port_id": "Id of the port where the nio should be remove"
+        },
+        status_codes={
+            200: "NIO deleted",
+            404: "VPCS instance doesn't exist"
+        },
+        description="Remove a NIO from a VPCS")
+    def delete_nio(request, response):
+
+        vpcs_manager = VPCS.instance()
+        vm = vpcs_manager.get_vm(int(request.match_info["id"]))
+        nio = vm.port_remove_nio_binding(int(request.match_info["port_id"]))
+        response.json({})
diff --git a/gns3server/modules/base_manager.py b/gns3server/modules/base_manager.py
index 923576b5..36d031a6 100644
--- a/gns3server/modules/base_manager.py
+++ b/gns3server/modules/base_manager.py
@@ -39,7 +39,7 @@ class BaseManager:
         :returns: instance of Manager
         """
 
-        if not hasattr(cls, "_instance"):
+        if not hasattr(cls, "_instance") or cls._instance is None:
             cls._instance = cls()
         return cls._instance
 
@@ -48,7 +48,7 @@ class BaseManager:
     def destroy(cls):
         cls._instance = None
 
-    def _get_vm_instance(self, vm_id):
+    def get_vm(self, vm_id):
         """
         Returns a VM instance.
 
@@ -80,10 +80,10 @@ class BaseManager:
 
     @asyncio.coroutine
     def start_vm(self, vm_id):
-        vm = self._get_vm_instance(vm_id)
+        vm = self.get_vm(vm_id)
         yield from vm.start()
 
     @asyncio.coroutine
     def stop_vm(self, vm_id):
-        vm = self._get_vm_instance(vm_id)
+        vm = self.get_vm(vm_id)
         yield from vm.stop()
diff --git a/gns3server/modules/base_vm.py b/gns3server/modules/base_vm.py
index 19571831..5fe85b64 100644
--- a/gns3server/modules/base_vm.py
+++ b/gns3server/modules/base_vm.py
@@ -19,74 +19,28 @@
 import asyncio
 from .vm_error import VMError
 from .attic import find_unused_port
+from ..config import Config
 
 import logging
 log = logging.getLogger(__name__)
 
 
 class BaseVM:
-    _allocated_console_ports = []
-
     def __init__(self, name, identifier, port_manager):
 
         self._loop = asyncio.get_event_loop()
-        self._allocate_console()
         self._queue = asyncio.Queue()
         self._name = name
         self._id = identifier
         self._created = asyncio.Future()
         self._worker = asyncio.async(self._run())
         self._port_manager = port_manager
+        self._config = Config.instance()
         log.info("{type} device {name} [id={id}] has been created".format(
             type=self.__class__.__name__,
             name=self._name,
             id=self._id))
 
-    def _allocate_console(self):
-
-        if not self._console:
-            # allocate a console port
-            try:
-                self._console = find_unused_port(self._console_start_port_range,
-                                                 self._console_end_port_range,
-                                                 self._console_host,
-                                                 ignore_ports=self._allocated_console_ports)
-            except Exception as e:
-                raise VMError(e)
-
-        if self._console in self._allocated_console_ports:
-            raise VMError("Console port {} is already used by another VM".format(self._console))
-        self._allocated_console_ports.append(self._console)
-
-
-    @property
-    def console(self):
-        """
-        Returns the TCP console port.
-
-        :returns: console port (integer)
-        """
-
-        return self._console
-
-    @console.setter
-    def console(self, console):
-        """
-        Sets the TCP console port.
-
-        :param console: console port (integer)
-        """
-
-        if console in self._allocated_console_ports:
-            raise VMError("Console port {} is already used by another VM".format(console))
-
-        self._allocated_console_ports.remove(self._console)
-        self._console = console
-        self._allocated_console_ports.append(self._console)
-        log.info("{type} {name} [id={id}]: console port set to {port}".format(type=self.__class__.__name__,
-                                                                              name=self._name,
-                                                                              id=self._id,
-                                                                              port=console))
     @property
     def id(self):
         """
diff --git a/gns3server/modules/virtualbox/virtualbox_vm.py b/gns3server/modules/virtualbox/virtualbox_vm.py
index e50ab9cb..22294edf 100644
--- a/gns3server/modules/virtualbox/virtualbox_vm.py
+++ b/gns3server/modules/virtualbox/virtualbox_vm.py
@@ -454,6 +454,8 @@ class VirtualBoxVM(object):
         """
 
         log.info("VirtualBox VM {name} [id={id}] has set the VM name to {vmname}".format(name=self._name, id=self._id, vmname=vmname))
+        if self._linked_clone:
+            self._modify_vm('--name "{}"'.format(vmname))
         self._vmname = vmname
 
     @property
diff --git a/gns3server/modules/vpcs/nios/nio_tap.py b/gns3server/modules/vpcs/nios/nio_tap.py
index 4c3ed6b2..39923a01 100644
--- a/gns3server/modules/vpcs/nios/nio_tap.py
+++ b/gns3server/modules/vpcs/nios/nio_tap.py
@@ -44,3 +44,6 @@ class NIO_TAP(object):
     def __str__(self):
 
         return "NIO TAP"
+
+    def __json__(self):
+        return {"type": "nio_tap", "tap_device": self._tap_device}
diff --git a/gns3server/modules/vpcs/nios/nio_udp.py b/gns3server/modules/vpcs/nios/nio_udp.py
index 0527f675..cca313e7 100644
--- a/gns3server/modules/vpcs/nios/nio_udp.py
+++ b/gns3server/modules/vpcs/nios/nio_udp.py
@@ -70,3 +70,6 @@ class NIO_UDP(object):
     def __str__(self):
 
         return "NIO UDP"
+
+    def __json__(self):
+        return {"type": "nio_udp", "lport": self._lport, "rport": self._rport, "rhost": self._rhost}
diff --git a/gns3server/modules/vpcs/vpcs_device.py b/gns3server/modules/vpcs/vpcs_device.py
index 61c896a0..d1531eb2 100644
--- a/gns3server/modules/vpcs/vpcs_device.py
+++ b/gns3server/modules/vpcs/vpcs_device.py
@@ -27,12 +27,15 @@ import signal
 import shutil
 import re
 import asyncio
+import socket
+import shutil
 
 from pkg_resources import parse_version
 from .vpcs_error import VPCSError
 from .adapters.ethernet_adapter import EthernetAdapter
 from .nios.nio_udp import NIO_UDP
 from .nios.nio_tap import NIO_TAP
+from ..attic import has_privileged_access
 
 from ..base_vm import BaseVM
 
@@ -50,17 +53,17 @@ class VPCSDevice(BaseVM):
     :param console: TCP console port
     """
     def __init__(self, name, vpcs_id, port_manager,
-             path = None,
-             working_dir = None,
-             console=None):
+             working_dir = None, console = None):
+        super().__init__(name, vpcs_id, port_manager)
 
         #self._path = path
         #self._working_dir = working_dir
         # TODO: Hardcodded for testing
-        self._path = "/usr/local/bin/vpcs"
-        self._working_dir = "/tmp"
+        self._path = self._config.get_section_config("VPCS").get("path", "vpcs")
 
+        self._working_dir = "/tmp"
         self._console = console
+
         self._command = []
         self._process = None
         self._vpcs_stdout_file = ""
@@ -87,12 +90,15 @@ class VPCSDevice(BaseVM):
             raise VPCSError(e)
 
         self._check_requirements()
-        super().__init__(name, vpcs_id, port_manager)
 
     def _check_requirements(self):
         """
         Check if VPCS is available with the correct version
         """
+        if self._path == "vpcs":
+            self._path = shutil.which("vpcs")
+
+
         if not self._path:
             raise VPCSError("No path to a VPCS executable has been set")
 
@@ -104,6 +110,16 @@ class VPCSDevice(BaseVM):
 
         self._check_vpcs_version()
 
+    @property
+    def console(self):
+        """
+        Returns the console port of this VPCS device.
+
+        :returns: console port
+        """
+
+        return self._console
+
     @property
     def name(self):
         """
@@ -168,8 +184,8 @@ class VPCSDevice(BaseVM):
         """
 
         if not self.is_running():
-            # if not self._ethernet_adapter.get_nio(0):
-            #     raise VPCSError("This VPCS instance must be connected in order to start")
+            if not self._ethernet_adapter.get_nio(0):
+                raise VPCSError("This VPCS instance must be connected in order to start")
 
             self._command = self._build_command()
             try:
@@ -237,7 +253,7 @@ class VPCSDevice(BaseVM):
             return True
         return False
 
-    def port_add_nio_binding(self, port_id, nio):
+    def port_add_nio_binding(self, port_id, nio_settings):
         """
         Adds a port NIO binding.
 
@@ -249,11 +265,33 @@ class VPCSDevice(BaseVM):
             raise VPCSError("Port {port_id} doesn't exist in adapter {adapter}".format(adapter=self._ethernet_adapter,
                                                                                        port_id=port_id))
 
+        nio = None
+        if nio_settings["type"] == "nio_udp":
+            lport = nio_settings["lport"]
+            rhost = nio_settings["rhost"]
+            rport = nio_settings["rport"]
+            try:
+                #TODO: handle IPv6
+                with socket.socket(socket.AF_INET, socket.SOCK_DGRAM) as sock:
+                    sock.connect((rhost, rport))
+            except OSError as e:
+                raise VPCSError("Could not create an UDP connection to {}:{}: {}".format(rhost, rport, e))
+            nio = NIO_UDP(lport, rhost, rport)
+        elif nio_settings["type"] == "nio_tap":
+            tap_device = nio_settings["tap_device"]
+            if not has_privileged_access(self._path):
+                raise VPCSError("{} has no privileged access to {}.".format(self._path, tap_device))
+            nio = NIO_TAP(tap_device)
+        if not nio:
+            raise VPCSError("Requested NIO does not exist or is not supported: {}".format(nio_settings["type"]))
+
+
         self._ethernet_adapter.add_nio(port_id, nio)
         log.info("VPCS {name} [id={id}]: {nio} added to port {port_id}".format(name=self._name,
                                                                                id=self._id,
                                                                                nio=nio,
                                                                                port_id=port_id))
+        return nio
 
     def port_remove_nio_binding(self, port_id):
         """
@@ -317,6 +355,8 @@ class VPCSDevice(BaseVM):
 
         nio = self._ethernet_adapter.get_nio(0)
         if nio:
+            print(nio)
+            print(isinstance(nio, NIO_UDP))
             if isinstance(nio, NIO_UDP):
                 # UDP tunnel
                 command.extend(["-s", str(nio.lport)])  # source UDP port
diff --git a/gns3server/schemas/vpcs.py b/gns3server/schemas/vpcs.py
index 2947efba..a2819471 100644
--- a/gns3server/schemas/vpcs.py
+++ b/gns3server/schemas/vpcs.py
@@ -42,7 +42,7 @@ VPCS_CREATE_SCHEMA = {
 }
 
 
-VPCS_ADD_NIO_SCHEMA = {
+VPCS_NIO_SCHEMA = {
     "$schema": "http://json-schema.org/draft-04/schema#",
     "description": "Request validation to add a NIO for a VPCS instance",
     "type": "object",
@@ -75,36 +75,6 @@ VPCS_ADD_NIO_SCHEMA = {
             "required": ["type", "lport", "rhost", "rport"],
             "additionalProperties": False
         },
-        "Ethernet": {
-            "description": "Generic Ethernet Network Input/Output",
-            "properties": {
-                "type": {
-                    "enum": ["nio_generic_ethernet"]
-                },
-                "ethernet_device": {
-                    "description": "Ethernet device name e.g. eth0",
-                    "type": "string",
-                    "minLength": 1
-                },
-            },
-            "required": ["type", "ethernet_device"],
-            "additionalProperties": False
-        },
-        "LinuxEthernet": {
-            "description": "Linux Ethernet Network Input/Output",
-            "properties": {
-                "type": {
-                    "enum": ["nio_linux_ethernet"]
-                },
-                "ethernet_device": {
-                    "description": "Ethernet device name e.g. eth0",
-                    "type": "string",
-                    "minLength": 1
-                },
-            },
-            "required": ["type", "ethernet_device"],
-            "additionalProperties": False
-        },
         "TAP": {
             "description": "TAP Network Input/Output",
             "properties": {
@@ -120,89 +90,14 @@ VPCS_ADD_NIO_SCHEMA = {
             "required": ["type", "tap_device"],
             "additionalProperties": False
         },
-        "UNIX": {
-            "description": "UNIX Network Input/Output",
-            "properties": {
-                "type": {
-                    "enum": ["nio_unix"]
-                },
-                "local_file": {
-                    "description": "path to the UNIX socket file (local)",
-                    "type": "string",
-                    "minLength": 1
-                },
-                "remote_file": {
-                    "description": "path to the UNIX socket file (remote)",
-                    "type": "string",
-                    "minLength": 1
-                },
-            },
-            "required": ["type", "local_file", "remote_file"],
-            "additionalProperties": False
-        },
-        "VDE": {
-            "description": "VDE Network Input/Output",
-            "properties": {
-                "type": {
-                    "enum": ["nio_vde"]
-                },
-                "control_file": {
-                    "description": "path to the VDE control file",
-                    "type": "string",
-                    "minLength": 1
-                },
-                "local_file": {
-                    "description": "path to the VDE control file",
-                    "type": "string",
-                    "minLength": 1
-                },
-            },
-            "required": ["type", "control_file", "local_file"],
-            "additionalProperties": False
-        },
-        "NULL": {
-            "description": "NULL Network Input/Output",
-            "properties": {
-                "type": {
-                    "enum": ["nio_null"]
-                },
-            },
-            "required": ["type"],
-            "additionalProperties": False
-        },
     },
 
-    "properties": {
-        "id": {
-            "description": "VPCS device instance ID",
-            "type": "integer"
-        },
-        "port_id": {
-            "description": "Unique port identifier for the VPCS instance",
-            "type": "integer"
-        },
-        "port": {
-            "description": "Port number",
-            "type": "integer",
-            "minimum": 0,
-            "maximum": 0
-        },
-        "nio": {
-            "type": "object",
-            "description": "Network Input/Output",
-            "oneOf": [
-                {"$ref": "#/definitions/UDP"},
-                {"$ref": "#/definitions/Ethernet"},
-                {"$ref": "#/definitions/LinuxEthernet"},
-                {"$ref": "#/definitions/TAP"},
-                {"$ref": "#/definitions/UNIX"},
-                {"$ref": "#/definitions/VDE"},
-                {"$ref": "#/definitions/NULL"},
-            ]
-        },
-    },
-    "additionalProperties": False,
-    "required": ["id", "port_id", "port", "nio"]
+    "oneOf": [
+        {"$ref": "#/definitions/UDP"},
+        {"$ref": "#/definitions/TAP"},
+    ],
+    "additionalProperties": True,
+    "required": ['type']
 }
 
 VPCS_OBJECT_SCHEMA = {
@@ -230,41 +125,3 @@ VPCS_OBJECT_SCHEMA = {
     "required": ["name", "id", "console"]
 }
 
-VBOX_CREATE_SCHEMA = {
-    "$schema": "http://json-schema.org/draft-04/schema#",
-    "description": "Request validation to create a new VirtualBox VM instance",
-    "type": "object",
-    "properties": {
-        "name": {
-            "description": "VirtualBox VM instance name",
-            "type": "string",
-            "minLength": 1,
-        },
-        "vbox_id": {
-            "description": "VirtualBox VM instance ID",
-            "type": "integer"
-        },
-    },
-    "additionalProperties": False,
-    "required": ["name"],
-}
-
-
-VBOX_OBJECT_SCHEMA = {
-    "$schema": "http://json-schema.org/draft-04/schema#",
-    "description": "VirtualBox instance",
-    "type": "object",
-    "properties": {
-        "name": {
-            "description": "VirtualBox VM name",
-            "type": "string",
-            "minLength": 1,
-        },
-        "vbox_id": {
-            "description": "VirtualBox VM instance ID",
-            "type": "integer"
-        },
-    },
-    "additionalProperties": False,
-    "required": ["name", "vbox_id"]
-}
diff --git a/gns3server/version.py b/gns3server/version.py
index 049db3b8..ed60edd9 100644
--- a/gns3server/version.py
+++ b/gns3server/version.py
@@ -15,5 +15,14 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+# __version__ is a human-readable version number.
+
+# __version_info__ is a four-tuple for programmatic comparison. The first
+# three numbers are the components of the version number. The fourth
+# is zero for an official release, positive for a development branch,
+# or negative for a release candidate or beta (after the base version
+# number has been incremented)
+
 __version__ = "1.3.dev1"
 __version_info__ = (1, 3, 0, 0)
+
diff --git a/gns3server/web/response.py b/gns3server/web/response.py
index 325455f4..d829e725 100644
--- a/gns3server/web/response.py
+++ b/gns3server/web/response.py
@@ -18,7 +18,9 @@
 import json
 import jsonschema
 import aiohttp.web
+import logging
 
+log = logging.getLogger(__name__)
 
 class Response(aiohttp.web.Response):
 
@@ -29,13 +31,22 @@ class Response(aiohttp.web.Response):
         headers['X-Route'] = self._route
         super().__init__(headers=headers, **kwargs)
 
+    """
+    Set the response content type to application/json and serialize
+    the content.
+
+    :param anwser The response as a Python object
+    """
     def json(self, answer):
         """Pass a Python object and return a JSON as answer"""
 
         self.content_type = "application/json"
+        if hasattr(answer, '__json__'):
+            answer = answer.__json__()
         if self._output_schema is not None:
             try:
                 jsonschema.validate(answer, self._output_schema)
             except jsonschema.ValidationError as e:
+                log.error("Invalid output schema")
                 raise aiohttp.web.HTTPBadRequest(text="{}".format(e))
         self.body = json.dumps(answer, indent=4, sort_keys=True).encode('utf-8')
diff --git a/gns3server/web/route.py b/gns3server/web/route.py
index 1687cde9..086a6b50 100644
--- a/gns3server/web/route.py
+++ b/gns3server/web/route.py
@@ -19,6 +19,9 @@ import json
 import jsonschema
 import asyncio
 import aiohttp
+import logging
+
+log = logging.getLogger(__name__)
 
 from ..modules.vm_error import VMError
 from .response import Response
@@ -37,6 +40,7 @@ def parse_request(request, input_schema):
     try:
         jsonschema.validate(request.json, input_schema)
     except jsonschema.ValidationError as e:
+        log.error("Invalid input schema")
         raise aiohttp.web.HTTPBadRequest(text="Request is not {} '{}' in schema: {}".format(
             e.validator,
             e.validator_value,
@@ -66,6 +70,10 @@ class Route(object):
     def put(cls, path, *args, **kw):
         return cls._route('PUT', path, *args, **kw)
 
+    @classmethod
+    def delete(cls, path, *args, **kw):
+        return cls._route('DELETE', path, *args, **kw)
+
     @classmethod
     def _route(cls, method, path, *args, **kw):
         # This block is executed only the first time
diff --git a/tests/api/base.py b/tests/api/base.py
index a95d36c2..b8f5f395 100644
--- a/tests/api/base.py
+++ b/tests/api/base.py
@@ -44,6 +44,9 @@ class Query:
     def get(self, path, **kwargs):
         return self._fetch("GET", path, **kwargs)
 
+    def delete(self, path, **kwargs):
+        return self._fetch("DELETE", path, **kwargs)
+
     def _get_url(self, path):
         return "http://{}:{}{}".format(self._host, self._port, path)
 
diff --git a/tests/api/test_version.py b/tests/api/test_version.py
index 35d0f5b8..8fb46174 100644
--- a/tests/api/test_version.py
+++ b/tests/api/test_version.py
@@ -21,6 +21,7 @@ It's also used for unittest the HTTP implementation.
 """
 
 from tests.utils import asyncio_patch
+from tests.api.base import server, loop, port_manager
 from gns3server.version import __version__
 
 
diff --git a/tests/api/test_vpcs.py b/tests/api/test_vpcs.py
index 6abb5c3c..365f86a7 100644
--- a/tests/api/test_vpcs.py
+++ b/tests/api/test_vpcs.py
@@ -15,7 +15,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+from tests.api.base import server, loop
 from tests.utils import asyncio_patch
+from gns3server import modules
 
 
 @asyncio_patch('gns3server.modules.VPCS.create_vm', return_value=84)
@@ -27,17 +29,41 @@ def test_vpcs_create(server):
     assert response.json['id'] == 84
 
 
-def test_vpcs_nio_create(server):
-    response = server.post('/vpcs/42/nio', {
-        'id': 42,
-        'nio': {
-            'type': 'nio_unix',
-            'local_file': '/tmp/test',
-            'remote_file': '/tmp/remote'
+def test_vpcs_nio_create_udp(server):
+    vm = server.post('/vpcs', {'name': 'PC TEST 1'})
+    response = server.post('/vpcs/{}/ports/0/nio'.format(vm.json["id"]), {
+            'type': 'nio_udp',
+            'lport': 4242,
+            'rport': 4343,
+            'rhost': '127.0.0.1'
         },
-        'port': 0,
-        'port_id': 0},
         example=True)
     assert response.status == 200
-    assert response.route == '/vpcs/{id}/nio'
-    assert response.json['name'] == 'PC 2'
+    assert response.route == '/vpcs/{id}/ports/{port_id}/nio'
+    assert response.json['type'] == 'nio_udp'
+
+@patch("gns3server.modules.vpcs.vpcs_device.has_privileged_access", return_value=True)
+def test_vpcs_nio_create_tap(mock, server):
+    vm = server.post('/vpcs', {'name': 'PC TEST 1'})
+    response = server.post('/vpcs/{}/ports/0/nio'.format(vm.json["id"]), {
+            'type': 'nio_tap',
+            'tap_device': 'test',
+        })
+    assert response.status == 200
+    assert response.route == '/vpcs/{vpcs_id}/ports/{port_id}/nio'
+    assert response.json['type'] == 'nio_tap'
+
+def test_vpcs_delete_nio(server):
+    vm = server.post('/vpcs', {'name': 'PC TEST 1'})
+    response = server.post('/vpcs/{}/ports/0/nio'.format(vm.json["id"]), {
+            'type': 'nio_udp',
+            'lport': 4242,
+            'rport': 4343,
+            'rhost': '127.0.0.1'
+        },
+        )
+    response = server.delete('/vpcs/{}/ports/0/nio'.format(vm.json["vpcs_id"]), example=True)
+    assert response.status == 200
+    assert response.route == '/vpcs/{id}/ports/{port_id}/nio'
+
+
diff --git a/tests/modules/vpcs/test_vpcs_device.py b/tests/modules/vpcs/test_vpcs_device.py
index 7eeb8e82..4844e820 100644
--- a/tests/modules/vpcs/test_vpcs_device.py
+++ b/tests/modules/vpcs/test_vpcs_device.py
@@ -28,36 +28,64 @@ from gns3server.modules.vpcs.vpcs_error import VPCSError
 
 @patch("subprocess.check_output", return_value="Welcome to Virtual PC Simulator, version 0.6".encode("utf-8"))
 def test_vm(tmpdir, port_manager):
-    vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir), path="/bin/test")
+    vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
     assert vm.name == "test"
     assert vm.id == 42
 
 @patch("subprocess.check_output", return_value="Welcome to Virtual PC Simulator, version 0.1".encode("utf-8"))
 def test_vm_invalid_vpcs_version(tmpdir, port_manager):
     with pytest.raises(VPCSError):
-        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir), path="/bin/test")
+        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
         assert vm.name == "test"
         assert vm.id == 42
 
+@patch("gns3server.config.Config.get_section_config", return_value = {"path": "/bin/test_fake"})
 def test_vm_invalid_vpcs_path(tmpdir, port_manager):
     with pytest.raises(VPCSError):
-        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir), path="/bin/test_fake")
+        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
         assert vm.name == "test"
         assert vm.id == 42
 
 def test_start(tmpdir, loop, port_manager):
     with asyncio_patch("asyncio.create_subprocess_exec", return_value=MagicMock()):
-        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir), path="/bin/test")
+        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
+        nio = vm.port_add_nio_binding(0, {"type": "nio_udp", "lport": 4242, "rport": 4243, "rhost": "127.0.0.1"})
+
         loop.run_until_complete(asyncio.async(vm.start()))
         assert vm.is_running() == True
 
 def test_stop(tmpdir, loop, port_manager):
     process = MagicMock()
     with asyncio_patch("asyncio.create_subprocess_exec", return_value=process):
-        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir), path="/bin/test")
+        vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
+        nio = vm.port_add_nio_binding(0, {"type": "nio_udp", "lport": 4242, "rport": 4243, "rhost": "127.0.0.1"})
+
         loop.run_until_complete(asyncio.async(vm.start()))
         assert vm.is_running() == True
         loop.run_until_complete(asyncio.async(vm.stop()))
         assert vm.is_running() == False
         process.terminate.assert_called_with()
 
+def test_add_nio_binding_udp(port_manager, tmpdir):
+    vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
+    nio = vm.port_add_nio_binding(0, {"type": "nio_udp", "lport": 4242, "rport": 4243, "rhost": "127.0.0.1"})
+    assert nio.lport == 4242
+
+def test_add_nio_binding_tap(port_manager, tmpdir):
+    vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
+    with patch("gns3server.modules.vpcs.vpcs_device.has_privileged_access", return_value=True):
+        nio = vm.port_add_nio_binding(0, {"type": "nio_tap", "tap_device": "test"})
+        assert nio.tap_device == "test"
+
+def test_add_nio_binding_tap_no_privileged_access(port_manager, tmpdir):
+    vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
+    with patch("gns3server.modules.vpcs.vpcs_device.has_privileged_access", return_value=False):
+        with pytest.raises(VPCSError):
+            vm.port_add_nio_binding(0, {"type": "nio_tap", "tap_device": "test"})
+    assert vm._ethernet_adapter.ports[0] is not None
+
+def test_port_remove_nio_binding(port_manager, tmpdir):
+    vm = VPCSDevice("test", 42, port_manager, working_dir=str(tmpdir))
+    nio = vm.port_add_nio_binding(0, {"type": "nio_udp", "lport": 4242, "rport": 4243, "rhost": "127.0.0.1"})
+    vm.port_remove_nio_binding(0)
+    assert vm._ethernet_adapter.ports[0] == None