diff --git a/CHANGELOG b/CHANGELOG
index f598184c..9762117b 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,38 @@
 # Change Log
 
+## 2.0.0 beta 4 16/02/2017
+
+* Lock aiohttp to 1.2.0 because 1.3 create bug with Qt
+* Avoid a crash in some conditions when reading the serial console
+* Disallow export of project with VirtualBox linked clone
+* Fix linked_clone property lost during topology convert
+* Catch permission error when restoring a snapshot
+* Fix a rare crash when closing a project
+* Fix error when you have error on your filesystem during project convertion
+* Catch error when we can't access to a unix socket
+* If we can't resolve compute name return 0.0.0.0
+* Raise an error if you put an invalid key in node name
+* Improve a lot project loading speed
+* Fix a potential crash
+* Fix the server don't start if a remote is unavailable
+* Do not crash if you pass {name} in name
+* Fix import/export of dynamips configuration
+* Simplify conversion process from 1.3 to 2.0
+* Prevent corruption of VM in VirtualBox when using linked clone
+* Fix creation of qemu img
+* Fix rare race condition when stopping ubridge
+* Prevent renaming of a running VirtualBox linked VM
+* Avoid crash when you broke your system permissions
+* Do not crash when you broke permission on your file system during execution
+* Fix a crash when you broke permission on your file system
+* Fix a rare race condition when exporting debug informations
+* Do not try to start the GNS3 VM if the name is none
+* Fix version check for VPCS
+* Fix pcap for PPP link with IOU
+* Correct link are not connected to the correct ethernet switch port after conversion
+* Fix an error if you don't have permissions on your symbols directory
+* Fix an error when converting some topologies from 1.3
+
 ## 2.0.0 beta 3 19/01/2017
 
 * Force the dependency on typing because otherwise it's broke on 3.4
@@ -45,7 +78,7 @@
 * Replace JSONDecodeError by ValueError (Python 3.4 compatibility)
 * Catch an error when we can't create the IOU directory
 
-## 1.5.3 12/01/2016
+## 1.5.3 12/01/2017
 
 * Fix sporadically systemd is unable to start gns3-server
 
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 00000000..fec7d333
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,34 @@
+# Dockerfile for GNS3 server development
+
+FROM ubuntu:16.04
+
+ENV DEBIAN_FRONTEND noninteractive
+
+# Set the locale
+RUN locale-gen en_US.UTF-8  
+ENV LANG en_US.UTF-8  
+ENV LANGUAGE en_US:en  
+ENV LC_ALL en_US.UTF-8 
+
+RUN apt-get update && apt-get install -y software-properties-common
+RUN add-apt-repository ppa:gns3/ppa
+RUN apt-get update && apt-get install -y \
+    python3-pip \
+    python3-dev \ 
+    qemu-system-x86 \
+    qemu-system-arm \
+    qemu-kvm \
+    libvirt-bin \
+    x11vnc 
+
+# Install uninstall to install dependencies
+RUN apt-get install -y vpcs ubridge
+
+ADD . /server
+WORKDIR /server
+
+RUN pip3 install -r /server/requirements.txt
+
+EXPOSE 3080
+
+CMD python3 -m gns3server --local
diff --git a/README.rst b/README.rst
index 81ffc9d5..e3ebfde5 100644
--- a/README.rst
+++ b/README.rst
@@ -71,6 +71,16 @@ To run tests use:
    py.test -v
 
 
+Docker container
+****************
+
+For development you can run the GNS3 server in a container
+
+.. code:: bash
+
+    bash scripts/docker_dev_server.sh
+
+
 Run as daemon (Unix only)
 **************************
 
diff --git a/gns3server/compute/virtualbox/virtualbox_vm.py b/gns3server/compute/virtualbox/virtualbox_vm.py
index 801988e2..e1d520dc 100644
--- a/gns3server/compute/virtualbox/virtualbox_vm.py
+++ b/gns3server/compute/virtualbox/virtualbox_vm.py
@@ -19,14 +19,16 @@
 VirtualBox VM instance.
 """
 
-import sys
-import shlex
 import re
 import os
-import tempfile
+import sys
 import json
+import uuid
+import shlex
+import shutil
 import socket
 import asyncio
+import tempfile
 import xml.etree.ElementTree as ET
 
 from gns3server.utils import parse_version
@@ -209,7 +211,16 @@ class VirtualBoxVM(BaseNode):
         if os.path.exists(self._linked_vbox_file()):
             tree = ET.parse(self._linked_vbox_file())
             machine = tree.getroot().find("{http://www.virtualbox.org/}Machine")
-            if machine is not None:
+            if machine is not None and machine.get("uuid") != "{" + self.id + "}":
+
+                for image in tree.getroot().findall("{http://www.virtualbox.org/}Image"):
+                    currentSnapshot = machine.get("currentSnapshot")
+                    if currentSnapshot:
+                        newSnapshot = re.sub("\{.*\}", "{" + str(uuid.uuid4()) + "}", currentSnapshot)
+                    shutil.move(os.path.join(self.working_dir, self._vmname, "Snapshots", currentSnapshot) + ".vdi",
+                                os.path.join(self.working_dir, self._vmname, "Snapshots", newSnapshot) + ".vdi")
+                    image.set("uuid", newSnapshot)
+
                 machine.set("uuid", "{" + self.id + "}")
                 tree.write(self._linked_vbox_file())
 
diff --git a/gns3server/controller/__init__.py b/gns3server/controller/__init__.py
index 581a9897..d0726713 100644
--- a/gns3server/controller/__init__.py
+++ b/gns3server/controller/__init__.py
@@ -367,7 +367,8 @@ class Controller:
         return project
 
     def remove_project(self, project):
-        del self._projects[project.id]
+        if project.id in self._projects:
+            del self._projects[project.id]
 
     @asyncio.coroutine
     def load_project(self, path, load=True):
diff --git a/gns3server/controller/export_project.py b/gns3server/controller/export_project.py
index 6fb0dd64..25c167e2 100644
--- a/gns3server/controller/export_project.py
+++ b/gns3server/controller/export_project.py
@@ -136,6 +136,8 @@ def _export_project_file(project, path, z, include_images, keep_compute_id, allo
     if "topology" in topology:
         if "nodes" in topology["topology"]:
             for node in topology["topology"]["nodes"]:
+                if node["node_type"] == "virtualbox" and node.get("properties", {}).get("linked_clone"):
+                    raise aiohttp.web.HTTPConflict(text="Topology with a linked {} clone could not be exported. Use qemu instead.".format(node["node_type"]))
                 if not allow_all_nodes and node["node_type"] in ["virtualbox", "vmware", "cloud"]:
                     raise aiohttp.web.HTTPConflict(text="Topology with a {} could not be exported".format(node["node_type"]))
 
diff --git a/gns3server/controller/project.py b/gns3server/controller/project.py
index 8796e028..5bf23744 100644
--- a/gns3server/controller/project.py
+++ b/gns3server/controller/project.py
@@ -536,7 +536,7 @@ class Project:
     @asyncio.coroutine
     def close(self, ignore_notification=False):
         yield from self.stop_all()
-        for compute in self._project_created_on_compute:
+        for compute in list(self._project_created_on_compute):
             try:
                 yield from compute.post("/projects/{}/close".format(self._id), dont_connect=True)
             # We don't care if a compute is down at this step
diff --git a/gns3server/controller/snapshot.py b/gns3server/controller/snapshot.py
index 217a16b7..4163a6b1 100644
--- a/gns3server/controller/snapshot.py
+++ b/gns3server/controller/snapshot.py
@@ -20,6 +20,7 @@ import os
 import uuid
 import shutil
 import asyncio
+import aiohttp.web
 from datetime import datetime, timezone
 
 
@@ -80,10 +81,13 @@ class Snapshot:
         # We don't send close notif to clients because the close / open dance is purely internal
         yield from self._project.close(ignore_notification=True)
         self._project.controller.notification.emit("snapshot.restored", self.__json__())
-        if os.path.exists(os.path.join(self._project.path, "project-files")):
-            shutil.rmtree(os.path.join(self._project.path, "project-files"))
-        with open(self._path, "rb") as f:
-            project = yield from import_project(self._project.controller, self._project.id, f, location=self._project.path)
+        try:
+            if os.path.exists(os.path.join(self._project.path, "project-files")):
+                shutil.rmtree(os.path.join(self._project.path, "project-files"))
+            with open(self._path, "rb") as f:
+                project = yield from import_project(self._project.controller, self._project.id, f, location=self._project.path)
+        except (OSError, PermissionError) as e:
+            raise aiohttp.web.HTTPConflict(text=str(e))
         yield from project.open()
         return project
 
diff --git a/gns3server/controller/topology.py b/gns3server/controller/topology.py
index 3f7a1540..c188e9a9 100644
--- a/gns3server/controller/topology.py
+++ b/gns3server/controller/topology.py
@@ -321,10 +321,12 @@ def _convert_1_3_later(topo, topo_path):
                 node["properties"]["ram"] = PLATFORMS_DEFAULT_RAM[old_node["type"].lower()]
         elif old_node["type"] == "VMwareVM":
             node["node_type"] = "vmware"
+            node["properties"]["linked_clone"] = old_node.get("linked_clone", False)
             if node["symbol"] is None:
                 node["symbol"] = ":/symbols/vmware_guest.svg"
         elif old_node["type"] == "VirtualBoxVM":
             node["node_type"] = "virtualbox"
+            node["properties"]["linked_clone"] = old_node.get("linked_clone", False)
             if node["symbol"] is None:
                 node["symbol"] = ":/symbols/vbox_guest.svg"
         elif old_node["type"] == "IOUDevice":
diff --git a/gns3server/crash_report.py b/gns3server/crash_report.py
index ecd23733..7edc2865 100644
--- a/gns3server/crash_report.py
+++ b/gns3server/crash_report.py
@@ -53,7 +53,7 @@ class CrashReport:
     Report crash to a third party service
     """
 
-    DSN = "sync+https://b7430bad849c4b88b3a928032d6cce5e:f140bfdd2ebb4bf4b929c002b45b2357@sentry.io/38482"
+    DSN = "sync+https://83564b27a6f6475488a3eb74c78f1760:ed5ac7c6d3f7428d960a84da98450b69@sentry.io/38482"
     if hasattr(sys, "frozen"):
         cacert = get_resource("cacert.pem")
         if cacert is not None and os.path.isfile(cacert):
diff --git a/gns3server/utils/asyncio/serial.py b/gns3server/utils/asyncio/serial.py
index 48d12bc0..c118a87e 100644
--- a/gns3server/utils/asyncio/serial.py
+++ b/gns3server/utils/asyncio/serial.py
@@ -34,6 +34,7 @@ class SerialReaderWriterProtocol(asyncio.Protocol):
 
     def __init__(self):
         self._output = asyncio.StreamReader()
+        self._closed = False
         self.transport = None
 
     def read(self, n=-1):
@@ -54,9 +55,11 @@ class SerialReaderWriterProtocol(asyncio.Protocol):
         self.transport = transport
 
     def data_received(self, data):
-        self._output.feed_data(data)
+        if not self._closed:
+            self._output.feed_data(data)
 
     def close(self):
+        self._closed = True
         self._output.feed_eof()
 
 
diff --git a/gns3server/version.py b/gns3server/version.py
index aff38c2d..b72f512a 100644
--- a/gns3server/version.py
+++ b/gns3server/version.py
@@ -25,3 +25,14 @@
 
 __version__ = "2.1.0dev1"
 __version_info__ = (2, 1, 0, -99)
+
+# If it's a git checkout try to add the commit
+if "dev" in __version__:
+    try:
+        import os
+        import subprocess
+        if os.path.exists(os.path.join(os.path.dirname(os.path.abspath(__file__)), "..", ".git")):
+            r = subprocess.run(["git", "rev-parse", "--short", "HEAD"], stdout=subprocess.PIPE).stdout.decode().strip("\n")
+            __version__ += "-" + r
+    except Exception as e:
+        print(e)
diff --git a/requirements.txt b/requirements.txt
index f79cf434..222e4b5a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 jsonschema>=2.4.0
-aiohttp>=1.2.0
+aiohttp==1.2.0
 aiohttp_cors>=0.4.0
-yarl>=0.8.1
+yarl>=0.9.6
 typing>=3.5.3.0 # Otherwise yarl fail with python 3.4 
 Jinja2>=2.7.3
 raven>=5.23.0
diff --git a/scripts/docker_dev_server.sh b/scripts/docker_dev_server.sh
new file mode 100644
index 00000000..a2f6e784
--- /dev/null
+++ b/scripts/docker_dev_server.sh
@@ -0,0 +1,23 @@
+#!/bin/sh
+#
+# Copyright (C) 2016 GNS3 Technologies Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# A docker server use for localy test a remote GNS3 server  
+
+docker build -t gns3-server .
+docker run -i -h gns3vm -p 8001:8001/tcp -t gns3-server python3 -m gns3server --local --port 8001
+
+
diff --git a/tests/controller/test_export_project.py b/tests/controller/test_export_project.py
index 65b1e80f..2b6b6610 100644
--- a/tests/controller/test_export_project.py
+++ b/tests/controller/test_export_project.py
@@ -190,9 +190,9 @@ def test_export_disallow_some_type(tmpdir, project, async_run):
     topology = {
         "topology": {
             "nodes": [
-                    {
-                        "node_type": "virtualbox"
-                    }
+                {
+                    "node_type": "cloud"
+                }
             ]
         }
     }
@@ -202,6 +202,24 @@ def test_export_disallow_some_type(tmpdir, project, async_run):
 
     with pytest.raises(aiohttp.web.HTTPConflict):
         z = async_run(export_project(project, str(tmpdir)))
+    z = async_run(export_project(project, str(tmpdir), allow_all_nodes=True))
+
+    # VirtualBox is always disallowed
+    topology = {
+        "topology": {
+            "nodes": [
+                {
+                    "node_type": "virtualbox",
+                    "properties": {
+                        "linked_clone": True
+                    }
+                }
+            ]
+        }
+    }
+    with open(os.path.join(path, "test.gns3"), 'w+') as f:
+        json.dump(topology, f)
+    with pytest.raises(aiohttp.web.HTTPConflict):
         z = async_run(export_project(project, str(tmpdir), allow_all_nodes=True))
 
 
@@ -215,18 +233,18 @@ def test_export_fix_path(tmpdir, project, async_run):
     topology = {
         "topology": {
             "nodes": [
-                    {
-                        "properties": {
-                            "image": "/tmp/c3725-adventerprisek9-mz.124-25d.image"
-                        },
-                        "node_type": "dynamips"
-                    },
                 {
-                        "properties": {
-                            "image": "gns3/webterm:lastest"
-                        },
-                        "node_type": "docker"
-                    }
+                    "properties": {
+                        "image": "/tmp/c3725-adventerprisek9-mz.124-25d.image"
+                    },
+                    "node_type": "dynamips"
+                },
+                {
+                    "properties": {
+                        "image": "gns3/webterm:lastest"
+                    },
+                    "node_type": "docker"
+                }
             ]
         }
     }
diff --git a/tests/controller/test_project.py b/tests/controller/test_project.py
index 1fec7320..4422c0d1 100644
--- a/tests/controller/test_project.py
+++ b/tests/controller/test_project.py
@@ -427,7 +427,7 @@ def test_duplicate(project, async_run, controller):
     remote_vpcs = async_run(project.add_node(compute, "test", None, node_type="vpcs", properties={"startup_config": "test.cfg"}))
 
     # We allow node not allowed for standard import / export
-    remote_virtualbox = async_run(project.add_node(compute, "test", None, node_type="virtualbox", properties={"startup_config": "test.cfg"}))
+    remote_virtualbox = async_run(project.add_node(compute, "test", None, node_type="vmware", properties={"startup_config": "test.cfg"}))
 
     new_project = async_run(project.duplicate(name="Hello"))
     assert new_project.id != project.id
diff --git a/tests/topologies/1_5_virtualbox/after/1_5_virtualbox.gns3 b/tests/topologies/1_5_virtualbox/after/1_5_virtualbox.gns3
index 1f591b24..ba17e46d 100644
--- a/tests/topologies/1_5_virtualbox/after/1_5_virtualbox.gns3
+++ b/tests/topologies/1_5_virtualbox/after/1_5_virtualbox.gns3
@@ -34,6 +34,7 @@
                 "port_segment_size": 0,
                 "first_port_name": null,
                 "properties": {
+                    "linked_clone": false,                
                     "acpi_shutdown": false,
                     "adapter_type": "Intel PRO/1000 MT Desktop (82540EM)",
                     "adapters": 1,
diff --git a/tests/topologies/1_5_vmware/after/1_5_vmware.gns3 b/tests/topologies/1_5_vmware/after/1_5_vmware.gns3
index 98a25f62..8238605c 100644
--- a/tests/topologies/1_5_vmware/after/1_5_vmware.gns3
+++ b/tests/topologies/1_5_vmware/after/1_5_vmware.gns3
@@ -34,6 +34,7 @@
                 "port_segment_size": 0,
                 "first_port_name": null,
                 "properties": {
+                    "linked_clone": false,
                     "acpi_shutdown": false,
                     "adapter_type": "e1000",
                     "adapters": 1,