diff --git a/gns3server/compute/builtin/nodes/cloud.py b/gns3server/compute/builtin/nodes/cloud.py
index 4ab5e742..02bcdce5 100644
--- a/gns3server/compute/builtin/nodes/cloud.py
+++ b/gns3server/compute/builtin/nodes/cloud.py
@@ -489,7 +489,7 @@ class Cloud(BaseNode):
         nio = self.get_nio(port_number)
         if nio.capturing:
             raise NodeError("Packet capture is already activated on port {port_number}".format(port_number=port_number))
-        nio.startPacketCapture(output_file)
+        nio.start_packet_capture(output_file)
         bridge_name = "{}-{}".format(self._id, port_number)
         await self._ubridge_send('bridge start_capture {name} "{output_file}"'.format(name=bridge_name,
                                                                                            output_file=output_file))
@@ -507,7 +507,7 @@ class Cloud(BaseNode):
         nio = self.get_nio(port_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
+        nio.stop_packet_capture()
         bridge_name = "{}-{}".format(self._id, port_number)
         await self._ubridge_send("bridge stop_capture {name}".format(name=bridge_name))
 
diff --git a/gns3server/compute/docker/docker_vm.py b/gns3server/compute/docker/docker_vm.py
index 2db4b451..ed5e0009 100644
--- a/gns3server/compute/docker/docker_vm.py
+++ b/gns3server/compute/docker/docker_vm.py
@@ -1057,8 +1057,7 @@ class DockerVM(BaseNode):
         if nio.capturing:
             raise DockerError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
 
-        nio.startPacketCapture(output_file)
-
+        nio.start_packet_capture(output_file)
         if self.status == "started" and self.ubridge:
             await self._start_ubridge_capture(adapter_number, output_file)
 
@@ -1076,7 +1075,7 @@ class DockerVM(BaseNode):
         nio = self.get_nio(adapter_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
+        nio.stop_packet_capture()
         if self.status == "started" and self.ubridge:
             await self._stop_ubridge_capture(adapter_number)
 
diff --git a/gns3server/compute/dynamips/nios/nio.py b/gns3server/compute/dynamips/nios/nio.py
index e705c117..17ed6a83 100644
--- a/gns3server/compute/dynamips/nios/nio.py
+++ b/gns3server/compute/dynamips/nios/nio.py
@@ -42,6 +42,8 @@ class NIO:
         self._filters = {}
         self._suspended = False
         self._capturing = False
+        self._pcap_output_file = ""
+        self._pcap_data_link_type = ""
         self._bandwidth = None  # no bandwidth constraint by default
         self._input_filter = None  # no input filter applied by default
         self._output_filter = None  # no output filter applied by default
@@ -66,6 +68,7 @@ class NIO:
 
         if self._input_filter or self._output_filter:
             await self.unbind_filter("both")
+            self._capturing = False
         await self._hypervisor.send("nio delete {}".format(self._name))
         log.info("NIO {name} has been deleted".format(name=self._name))
 
@@ -90,6 +93,30 @@ class NIO:
 
         await self._hypervisor.send("nio set_debug {name} {debug}".format(name=self._name, debug=debug))
 
+    async def start_packet_capture(self, pcap_output_file, pcap_data_link_type="DLT_EN10MB"):
+        """
+        Starts a packet capture.
+
+        :param pcap_output_file: PCAP destination file for the capture
+        :param pcap_data_link_type: PCAP data link type (DLT_*), default is DLT_EN10MB
+        """
+
+        await self.bind_filter("both", "capture")
+        await self.setup_filter("both", '{} "{}"'.format(pcap_data_link_type, pcap_output_file))
+        self._capturing = True
+        self._pcap_output_file = pcap_output_file
+        self._pcap_data_link_type = pcap_data_link_type
+
+    async def stop_packet_capture(self):
+        """
+        Stops a packet capture.
+        """
+
+        await self.unbind_filter("both")
+        self._capturing = False
+        self._pcap_output_file = ""
+        self._pcap_data_link_type = ""
+
     async def bind_filter(self, direction, filter_name):
         """
         Adds a packet filter to this NIO.
@@ -116,9 +143,6 @@ class NIO:
             self._input_filter = filter_name
             self._output_filter = filter_name
 
-        if filter_name == "capture":
-            self._capturing = True
-
     async def unbind_filter(self, direction):
         """
         Removes packet filter for this NIO.
@@ -283,6 +307,26 @@ class NIO:
 
         return self._capturing
 
+    @property
+    def pcap_output_file(self):
+        """
+        Returns the path to the PCAP output file.
+
+        :returns: path to the PCAP output file
+        """
+
+        return self._pcap_output_file
+
+    @property
+    def pcap_data_link_type(self):
+        """
+        Returns the PCAP data link type
+
+        :returns: PCAP data link type (DLT_* value)
+        """
+
+        return self._pcap_data_link_type
+
     def __str__(self):
         """
         NIO string representation.
diff --git a/gns3server/compute/dynamips/nodes/atm_switch.py b/gns3server/compute/dynamips/nodes/atm_switch.py
index 9c90f7ea..d8664260 100644
--- a/gns3server/compute/dynamips/nodes/atm_switch.py
+++ b/gns3server/compute/dynamips/nodes/atm_switch.py
@@ -452,9 +452,7 @@ class ATMSwitch(Device):
         if nio.input_filter[0] is not None and nio.output_filter[0] is not None:
             raise DynamipsError("Port {} has already a filter applied".format(port_number))
 
-        await nio.bind_filter("both", "capture")
-        await nio.setup_filter("both", '{} "{}"'.format(data_link_type, output_file))
-
+        await nio.start_packet_capture(output_file, data_link_type)
         log.info('ATM switch "{name}" [{id}]: starting packet capture on port {port}'.format(name=self._name,
                                                                                              id=self._id,
                                                                                              port=port_number))
@@ -469,7 +467,7 @@ class ATMSwitch(Device):
         nio = self.get_nio(port_number)
         if not nio.capturing:
             return
-        await nio.unbind_filter("both")
+        await nio.stop_packet_capture()
         log.info('ATM switch "{name}" [{id}]: stopping packet capture on port {port}'.format(name=self._name,
                                                                                              id=self._id,
                                                                                              port=port_number))
diff --git a/gns3server/compute/dynamips/nodes/ethernet_hub.py b/gns3server/compute/dynamips/nodes/ethernet_hub.py
index 3b512185..cdfea41a 100644
--- a/gns3server/compute/dynamips/nodes/ethernet_hub.py
+++ b/gns3server/compute/dynamips/nodes/ethernet_hub.py
@@ -212,9 +212,7 @@ class EthernetHub(Bridge):
         if nio.input_filter[0] is not None and nio.output_filter[0] is not None:
             raise DynamipsError("Port {} has already a filter applied".format(port_number))
 
-        await nio.bind_filter("both", "capture")
-        await nio.setup_filter("both", '{} "{}"'.format(data_link_type, output_file))
-
+        await nio.start_packet_capture(output_file, data_link_type)
         log.info('Ethernet hub "{name}" [{id}]: starting packet capture on port {port}'.format(name=self._name,
                                                                                                id=self._id,
                                                                                                port=port_number))
@@ -229,7 +227,7 @@ class EthernetHub(Bridge):
         nio = self.get_nio(port_number)
         if not nio.capturing:
             return
-        await nio.unbind_filter("both")
+        await nio.stop_packet_capture()
         log.info('Ethernet hub "{name}" [{id}]: stopping packet capture on port {port}'.format(name=self._name,
                                                                                                id=self._id,
                                                                                                port=port_number))
diff --git a/gns3server/compute/dynamips/nodes/ethernet_switch.py b/gns3server/compute/dynamips/nodes/ethernet_switch.py
index 89f75e4e..9b936cbd 100644
--- a/gns3server/compute/dynamips/nodes/ethernet_switch.py
+++ b/gns3server/compute/dynamips/nodes/ethernet_switch.py
@@ -441,9 +441,7 @@ class EthernetSwitch(Device):
         if nio.input_filter[0] is not None and nio.output_filter[0] is not None:
             raise DynamipsError("Port {} has already a filter applied".format(port_number))
 
-        await nio.bind_filter("both", "capture")
-        await nio.setup_filter("both", '{} "{}"'.format(data_link_type, output_file))
-
+        await nio.start_packet_capture(output_file, data_link_type)
         log.info('Ethernet switch "{name}" [{id}]: starting packet capture on port {port}'.format(name=self._name,
                                                                                                   id=self._id,
                                                                                                   port=port_number))
@@ -458,7 +456,7 @@ class EthernetSwitch(Device):
         nio = self.get_nio(port_number)
         if not nio.capturing:
             return
-        await nio.unbind_filter("both")
+        await nio.stop_packet_capture()
         log.info('Ethernet switch "{name}" [{id}]: stopping packet capture on port {port}'.format(name=self._name,
                                                                                                   id=self._id,
                                                                                                   port=port_number))
diff --git a/gns3server/compute/dynamips/nodes/frame_relay_switch.py b/gns3server/compute/dynamips/nodes/frame_relay_switch.py
index e2441548..535187c7 100644
--- a/gns3server/compute/dynamips/nodes/frame_relay_switch.py
+++ b/gns3server/compute/dynamips/nodes/frame_relay_switch.py
@@ -338,9 +338,7 @@ class FrameRelaySwitch(Device):
         if nio.input_filter[0] is not None and nio.output_filter[0] is not None:
             raise DynamipsError("Port {} has already a filter applied".format(port_number))
 
-        await nio.bind_filter("both", "capture")
-        await nio.setup_filter("both", '{} "{}"'.format(data_link_type, output_file))
-
+        await nio.start_packet_capture(output_file, data_link_type)
         log.info('Frame relay switch "{name}" [{id}]: starting packet capture on port {port}'.format(name=self._name,
                                                                                                      id=self._id,
                                                                                                      port=port_number))
@@ -355,7 +353,7 @@ class FrameRelaySwitch(Device):
         nio = self.get_nio(port_number)
         if not nio.capturing:
             return
-        await nio.unbind_filter("both")
+        await nio.stop_packet_capture()
         log.info('Frame relay switch "{name}" [{id}]: stopping packet capture on port {port}'.format(name=self._name,
                                                                                                      id=self._id,
                                                                                                      port=port_number))
diff --git a/gns3server/compute/dynamips/nodes/router.py b/gns3server/compute/dynamips/nodes/router.py
index d351e3f2..d7472a46 100644
--- a/gns3server/compute/dynamips/nodes/router.py
+++ b/gns3server/compute/dynamips/nodes/router.py
@@ -1445,10 +1445,7 @@ class Router(BaseNode):
         if nio.input_filter[0] is not None and nio.output_filter[0] is not None:
             raise DynamipsError("Port {port_number} has already a filter applied on {adapter}".format(adapter=adapter,
                                                                                                       port_number=port_number))
-
-        await nio.bind_filter("both", "capture")
-        await nio.setup_filter("both", '{} "{}"'.format(data_link_type, output_file))
-
+        await nio.start_packet_capture(output_file, data_link_type)
         log.info('Router "{name}" [{id}]: starting packet capture on port {slot_number}/{port_number}'.format(name=self._name,
                                                                                                               id=self._id,
                                                                                                               nio_name=nio.name,
@@ -1480,7 +1477,7 @@ class Router(BaseNode):
 
         if not nio.capturing:
             return
-        await nio.unbind_filter("both")
+        await nio.stop_packet_capture()
 
         log.info('Router "{name}" [{id}]: stopping packet capture on port {slot_number}/{port_number}'.format(name=self._name,
                                                                                                               id=self._id,
diff --git a/gns3server/compute/iou/iou_vm.py b/gns3server/compute/iou/iou_vm.py
index dfce1a8c..337624ca 100644
--- a/gns3server/compute/iou/iou_vm.py
+++ b/gns3server/compute/iou/iou_vm.py
@@ -1291,7 +1291,7 @@ class IOUVM(BaseNode):
             raise IOUError("Packet capture is already activated on {adapter_number}/{port_number}".format(adapter_number=adapter_number,
                                                                                                           port_number=port_number))
 
-        nio.startPacketCapture(output_file, data_link_type)
+        nio.start_packet_capture(output_file, data_link_type)
         log.info('IOU "{name}" [{id}]: starting packet capture on {adapter_number}/{port_number} to {output_file}'.format(name=self._name,
                                                                                                                           id=self._id,
                                                                                                                           adapter_number=adapter_number,
@@ -1317,7 +1317,7 @@ class IOUVM(BaseNode):
         nio = self.get_nio(adapter_number, port_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
+        nio.stop_packet_capture()
         log.info('IOU "{name}" [{id}]: stopping packet capture on {adapter_number}/{port_number}'.format(name=self._name,
                                                                                                          id=self._id,
                                                                                                          adapter_number=adapter_number,
diff --git a/gns3server/compute/nios/nio.py b/gns3server/compute/nios/nio.py
index 4df1576e..324c2639 100644
--- a/gns3server/compute/nios/nio.py
+++ b/gns3server/compute/nios/nio.py
@@ -34,7 +34,7 @@ class NIO(object):
         self._pcap_output_file = ""
         self._pcap_data_link_type = ""
 
-    def startPacketCapture(self, pcap_output_file, pcap_data_link_type="DLT_EN10MB"):
+    def start_packet_capture(self, pcap_output_file, pcap_data_link_type="DLT_EN10MB"):
         """
         :param pcap_output_file: PCAP destination file for the capture
         :param pcap_data_link_type: PCAP data link type (DLT_*), default is DLT_EN10MB
@@ -44,7 +44,7 @@ class NIO(object):
         self._pcap_output_file = pcap_output_file
         self._pcap_data_link_type = pcap_data_link_type
 
-    def stopPacketCapture(self):
+    def stop_packet_capture(self):
 
         self._capturing = False
         self._pcap_output_file = ""
diff --git a/gns3server/compute/qemu/qemu_vm.py b/gns3server/compute/qemu/qemu_vm.py
index 690ee5f8..5d34da9b 100644
--- a/gns3server/compute/qemu/qemu_vm.py
+++ b/gns3server/compute/qemu/qemu_vm.py
@@ -1325,8 +1325,7 @@ class QemuVM(BaseNode):
         if nio.capturing:
             raise QemuError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
 
-        nio.startPacketCapture(output_file)
-
+        nio.start_packet_capture(output_file)
         if self.ubridge:
             await self._ubridge_send('bridge start_capture {name} "{output_file}"'.format(name="QEMU-{}-{}".format(self._id, adapter_number),
                                                                                                output_file=output_file))
@@ -1345,8 +1344,8 @@ class QemuVM(BaseNode):
         nio = self.get_nio(adapter_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
 
+        nio.stop_packet_capture()
         if self.ubridge:
             await self._ubridge_send('bridge stop_capture {name}'.format(name="QEMU-{}-{}".format(self._id, adapter_number)))
 
diff --git a/gns3server/compute/traceng/traceng_vm.py b/gns3server/compute/traceng/traceng_vm.py
index e1a0b4c0..f8f8c926 100644
--- a/gns3server/compute/traceng/traceng_vm.py
+++ b/gns3server/compute/traceng/traceng_vm.py
@@ -392,8 +392,7 @@ class TraceNGVM(BaseNode):
         if nio.capturing:
             raise TraceNGError("Packet capture is already activated on port {port_number}".format(port_number=port_number))
 
-        nio.startPacketCapture(output_file)
-
+        nio.start_packet_capture(output_file)
         if self.ubridge:
             await self._ubridge_send('bridge start_capture {name} "{output_file}"'.format(name="TraceNG-{}".format(self._id),
                                                                                                output_file=output_file))
@@ -412,8 +411,8 @@ class TraceNGVM(BaseNode):
         nio = self.get_nio(port_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
 
+        nio.stop_packet_capture()
         if self.ubridge:
             await self._ubridge_send('bridge stop_capture {name}'.format(name="TraceNG-{}".format(self._id)))
 
diff --git a/gns3server/compute/virtualbox/virtualbox_vm.py b/gns3server/compute/virtualbox/virtualbox_vm.py
index 23218c35..5337852f 100644
--- a/gns3server/compute/virtualbox/virtualbox_vm.py
+++ b/gns3server/compute/virtualbox/virtualbox_vm.py
@@ -1117,8 +1117,7 @@ class VirtualBoxVM(BaseNode):
         if nio.capturing:
             raise VirtualBoxError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
 
-        nio.startPacketCapture(output_file)
-
+        nio.start_packet_capture(output_file)
         if self.ubridge:
             await self._ubridge_send('bridge start_capture {name} "{output_file}"'.format(name="VBOX-{}-{}".format(self._id, adapter_number),
                                                                                                output_file=output_file))
@@ -1137,8 +1136,8 @@ class VirtualBoxVM(BaseNode):
         nio = self.get_nio(adapter_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
 
+        nio.stop_packet_capture()
         if self.ubridge:
             await self._ubridge_send('bridge stop_capture {name}'.format(name="VBOX-{}-{}".format(self._id, adapter_number)))
 
diff --git a/gns3server/compute/vmware/vmware_vm.py b/gns3server/compute/vmware/vmware_vm.py
index f52400cf..28b67ca2 100644
--- a/gns3server/compute/vmware/vmware_vm.py
+++ b/gns3server/compute/vmware/vmware_vm.py
@@ -900,8 +900,7 @@ class VMwareVM(BaseNode):
         if nio.capturing:
             raise VMwareError("Packet capture is already activated on adapter {adapter_number}".format(adapter_number=adapter_number))
 
-        nio.startPacketCapture(output_file)
-
+        nio.start_packet_capture(output_file)
         if self._started:
             await self._start_ubridge_capture(adapter_number, output_file)
 
@@ -919,8 +918,8 @@ class VMwareVM(BaseNode):
         nio = self.get_nio(adapter_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
 
+        nio.stop_packet_capture()
         if self._started:
             await self._stop_ubridge_capture(adapter_number)
 
diff --git a/gns3server/compute/vpcs/vpcs_vm.py b/gns3server/compute/vpcs/vpcs_vm.py
index afc31e73..80eb8d5b 100644
--- a/gns3server/compute/vpcs/vpcs_vm.py
+++ b/gns3server/compute/vpcs/vpcs_vm.py
@@ -449,8 +449,7 @@ class VPCSVM(BaseNode):
         if nio.capturing:
             raise VPCSError("Packet capture is already active on port {port_number}".format(port_number=port_number))
 
-        nio.startPacketCapture(output_file)
-
+        nio.start_packet_capture(output_file)
         if self.ubridge:
             await self._ubridge_send('bridge start_capture {name} "{output_file}"'.format(name="VPCS-{}".format(self._id),
                                                                                                output_file=output_file))
@@ -469,8 +468,8 @@ class VPCSVM(BaseNode):
         nio = self.get_nio(port_number)
         if not nio.capturing:
             return
-        nio.stopPacketCapture()
 
+        nio.stop_packet_capture()
         if self.ubridge:
             await self._ubridge_send('bridge stop_capture {name}'.format(name="VPCS-{}".format(self._id)))
 
diff --git a/tests/compute/docker/test_docker_vm.py b/tests/compute/docker/test_docker_vm.py
index 4108cf6f..44e02577 100644
--- a/tests/compute/docker/test_docker_vm.py
+++ b/tests/compute/docker/test_docker_vm.py
@@ -767,7 +767,7 @@ def test_add_ubridge_connection(loop, vm):
            "rport": 4343,
            "rhost": "127.0.0.1"}
     nio = vm.manager.create_nio(nio)
-    nio.startPacketCapture("/tmp/capture.pcap")
+    nio.start_packet_capture("/tmp/capture.pcap")
     vm._ubridge_hypervisor = MagicMock()
     vm._namespace = 42