Data Tracker For Mac

9 March 2015 Network Traffic Monitoring,NetFort Blog

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Associating Internet activity with MAC addresses

Tracking web activity is nothing new. For many years IT managers have tried to get some sort of visibility at the network edge so that they can see what is happening. One of the main drivers for this is the need to keep the network secure. As Internet usage is constantly growing, malicious, phishing, scamming and fraudulent sites are also evolving.

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While some firewalls and proxy servers include reporting capabilities, most are not up to the job. These systems were designed to block or control access and reporting was just added on at a later date. Server log files do not always have the answer either. They are meant to provide server administrators with data about the behaviour of the server, not what users are doing on the Internet.

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Some vendors are pitching flow type (NetFlow, IPFIX, etc…) tools to address the problem. The idea is that you get flow records from the edge of your network so you can see what IP address is connecting to what. However, as with server logs, NetFlow isn’t a web usage tracker. The main reason for this is that it does not look at HTTP headers where a lot of the important information is stored.

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Use the deep packet inspection engine of LANGuardian to report on network activity by MAC, IP address or Username. Real time and historical reports available.

One of the best data sources for web tracking is packet capture. You can enable packet capturing with SPANmirror ports, packet brokers, TAPs or by using promiscuous mode on virtual platforms. Word microsoft for mac free download. software. The trick is to pull the relevant information and discard the rest so you don’t end up storing massive packet captures.

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Relevant information includes things like MAC address, source IP, destination IP, time, website, URI and username. You only see the big picture when you have all of these variables in front of you.

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Why track Internet activity?

  • Root out the source of Ransomware and other security threats. Track it down to specific users, IP addresses or MAC addresses
  • Maintain logs so that you can respond to third party requests. Finding the source of Bittorrent use would be a common requirement on open networks.
  • Find out why your Internet connection is slow. Employees watching HD movies is a frequent cause.
  • Out-of-band network forensics for troubleshooting or identifying odd network traffic.

Customer Use Case

End user is a very large airport in EMEA. Basic requirements and use case is tracking web activity, keeping a historical record of it for a period of one year, and because most of the users are just passing through (thousands of wireless users every hour!) the only way to uniquely identify each user or device is by MAC address.

Luckily for us, because the LANGuardian HTTP decoder captures and analyses wire data off a SPAN or mirror port it can easily track proxy or non-proxy traffic by IP or MAC address. The customer can also drill down to URI level when they need to investigate an incident. For them LANGuardian is an ideal solution for tracking BYOD activity as there are no modifications to the network and no agents, clients or logs required.

The MAC address variable is an important one when it comes to tracking devices on your network. Most networks use DHCP servers so you cannot rely on tracking activity based on IP addresses only. MAC addresses are unique per device so they will give you a reliable audit trail as to what is happening on your network.

Do you track web actvity on your network? If so, what data sources do you use? Comments welcome.

Darragh Delaney

The device tracker allows you to track devices in Home Assistant. This can happen by querying your wireless router or by having applications push location info.

Configuring a device_tracker platform

To get started add the following lines to your configuration.yaml (example for Netgear):

The following optional parameters can be used with any platform:

Device tracker will only look for the following global settings under the configuration of the first configured platform:
ParameterDefaultDescription
interval_seconds12Seconds between each scan for new devices. This only applies to local device trackers, not applications that push updates.
consider_home180Seconds to wait till marking someone as not home after not being seen. This parameter is most useful for households with Apple iOS devices that go into sleep mode while still at home to conserve battery life. iPhones will occasionally drop off the network and then re-appear. consider_home helps prevent false alarms in presence detection when using IP scanners such as Nmap. consider_home accepts various time representations, (e.g., the following all represents 3 minutes: 180, 0:03, 0:03:00)

Note that setting track_new_devices: false will still result in new devices being recorded in known_devices.yaml, but they won’t be tracked (track: false).

The extended example from above would look like the following sample:

Multiple device trackers can be used in parallel, such as Owntracks and Nmap. The state of the device will be determined by the source that reported last.

known_devices.yaml

As of 0.94 known_devices.yaml is being phased out and no longer used by all trackers. Depending on the integration you use this section may no longer apply. This includes OwnTracks, GeoFency, GPSLogger, Locative and Huawei LTE.

Once device_tracker is enabled, a file will be created in your configuration dir named known_devices.yaml. Edit this file to adjust which devices to be tracked.

Here’s an example configuration for a single device:

In the example above, devicename refers to the detected name of the device. For example, with nmap, this will be the MAC address (with byte separators omitted).

ParameterDefaultDescription
nameHost name or “Unnamed Device”The friendly name of the device.
macNoneThe MAC address of the device. Add this if you are using a network device tracker like Nmap or SNMP.
pictureNoneA picture that you can use to easily identify the person or device. You can also save the image file in a folder “www” in the same location (can be obtained from developer tools) where you have your configuration.yaml file and just use picture: /local/favicon-192x192.png. The path ‘local’ is mapped to the ‘www’ folder you create.
iconmdi:accountAn icon for this device (use as an alternative to picture).
gravatarNoneAn email address for the device’s owner. If provided, it will override picture.
track[uses platform setting]If yes/on/true then the device will be tracked. Otherwise its location and state will not update.
consider_home[uses platform setting]Seconds to wait till marking someone as not home after not being seen. Allows you to override the global consider_home setting from the platform configuration on a per device level.
Data

Device states

The state of your tracked device will be 'home' if it is in the home zone, detected by your network or Bluetooth based presence detection. If you’re using a presence detection method that includes coordinates then when it’s in a zone the state will be the name of the zone (case sensitive). When a device isn’t at home and isn’t in any zone, the state will be 'not_home'.

device_tracker.see service

The device_tracker.see service can be used to manually update the state of a device tracker:

Data

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Service data attributeOptionalDescription
dev_idnoThe second half of the entity_id, for example tardis for device_tracker.tardis
location_namenoThe location, home, not_home, or the name of the zone
host_nameyesThe hostname of the device tracker
macyesThe MAC address of the entity (only specify if you’re updating a network based tracker)
gpsyesIf you’re providing a location, for example [51.513845, -0.100539]
gps_accuracyyesThe accuracy of the GPS fix
batteryyesThe battery level of the device