Paessler PRTG

Monitor local area networks with
the PRTG LAN Scanner feature


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    PRTG monitors LANs and your entire IT infrastructure 
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    PRTG is an all-in-one monitoring tool with LAN scanner capabilities 
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    PRTG comes with an Auto Discovery feature for setup in just minutes








A local area network (LAN) connects computers and peripheral devices located inside a building or an individual room. In order for employees to stay productive, companies need a monitoring tool with LAN scanner capabilities. Only then can they quickly get to the root of problems and prevent costly failures and downtime.


What is a LAN scanner?

A LAN (or network) scanner is software that detects and sorts the devices in a network

By using a monitoring tool with LAN scanner capabilities, you'll not only obtain a precise overview of your local area network, but also enjoy quicker and more effective troubleshooting. A LAN scanner (or a tool like PRTG) even lets you stop problems in the local network before they arise. As a result, you’ll guarantee uninterrupted availability, the highest level of security, and the best possible performance for your LANs.


 What are the benefits of LAN monitoring with PRTG?

Efficient workflows

In order to maximize employee productivity, applications must run quickly and smoothly. But that’s not all: the PCs, printers, and servers in the LAN must always be available. PRTG is therefore equipped with LAN scanner capabilities to make bandwidth problems visible.

Detect bottlenecks

LAN bottlenecks are overloaded routers or switches that affect the entire network. As a rule of thumb, the more devices and systems in a local network, the higher the number of potential bottlenecks – and thus the importance of a LAN scanner. PRTG automatically detects bottlenecks to reduce (or even prevent) downtime.

Optimize network performance

By continually monitoring your LAN, PRTG keeps a constant eye on parameters such as bandwidth. As a result, bandwidth overloads can be detected and resolved before they lead to errors and downtime. With PRTG, networks stay stable and productive. LAN bandwidth monitoring runs conveniently in the background. If something goes wrong, the tool notifies you at once.









Which protocols are available for LAN monitoring?


SNMP, packet sniffing, and NetFlow are some of the protocols used for LAN monitoring.

NetFlow and packet sniffing are used to monitor the traffic in the local area network. SNMP is used to monitor your network and keep you updated on its performance.

PRTG comes with a variety of preconfigured sensors for LAN monitoring.



A sneak peek at LAN monitoring in PRTG



How do I scan my LAN with PRTG?


With PRTG, setting up your monitoring is easy. Entirely customizable, it lets you start monitoring your LAN in a few short minutes – and make changes to your settings as needed. The Auto Discovery feature scans for all the accessible devices in the LAN and helps you configure your sensors. This scan takes place automatically upon installing PRTG. PRTG shows you the available devices in your network, as well as the sensors that are suitable for their monitoring.


Your network monitoring at a glance

Set up PRTG in minutes and use it on almost any mobile device.


PRTG comes with all the features you need, plus more your IT infrastructure won't want to live without.



PRTG monitors these vendors and applications in one view!


vendors vm ware



How to use the auto discovery feature in PRTG




















SNMP CPU Load Sensor

Step 1

Define a network segment or a range of IP addresses to find network devices via ping, then launch the Auto Discovery feature.

SNMP Memory Sensor

Step 2

During the LAN scan, the software determines which types of devices are found and creates sensors for them. Depending on the size of your network (and the number of devices), the Auto Discovery can sometimes take longer to complete.

Ping Sensor

Step 3

PRTG creates a device tree for all the available devices and uses built-in templates that already include suitable sensors for several types of devices.


Auto Discovery can be performed once or repeatedly, e.g., via a regular LAN scan. In each case, newly created devices are added to the tree with the corresponding sensors. PRTG notifies you whenever it detects a new device in your network or if an error has occurred.


Which sensors are available in PRTG?

PRTG comes with more than 250 preconfigured sensors  for the most popular device manufacturers, as well as for different areas of application (e.g., sensors for general monitoring with default parameters, sensors for bandwidth monitoring, SNMP sensors, etc.). Sensors for LAN monitoring include:


Which parts of the LAN does PRTG scan?

 iBandwidth is measured as the amount of data that can be transferred from one point to another within a network in a specific amount of time. Typically, bandwidth is expressed as a bitrate and measured in bits per second (bps). It refers to the transmission capacity of a connection and is an important factor when determining the quality and speed of a network.
Read more

PRTG monitors your entire network environment, including devices such as:

You can also use PRTG to monitor applications, bandwidth, cloud services, databases, uptime, ports, IPs, security, web services, hard drives, and more.




quote steffen ille

“The greatest advantage of PRTG? You get to rest easy.“

Steffen Ille, Bauhaus-University of Weimar, Germany


Trusted by 500,000 users and recognized
by industry analysts as a leader

“Fantastic network and infrastructure monitoring solution that is easy to deploy and easier still to use. Simply the best available.”

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“Software is absolutely perfect, Support is superior. Meets all needs and requirements, this is a must have solution if you are needing any form of monitoring.”

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“The tool excels at its primary focus of being a unified infrastructure management and network monitoring service.”

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Create innovative solutions with Paessler’s partners

Partnering with innovative vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.


By integrating PRTG with Martello iQ, you can add a fast analytics layer to improve uptime, visualize your IT environment, and integrate all of your IT systems into a single pane of glass.

Read more


Paessler and Plixer provide a complete solution adding flow and metadata analysis to a powerful network monitoring tool.

Read more


Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.

Read more


What are some of the other advantages of PRTG?


PRTG makes life easy

Sure, PRTG is super easy to install on a computer. But that’s not all. Its Auto Discovery feature simplifies the initial setup, making the tool ready to use in just a few minutes. What’s more, the LAN scanner in PRTG is intuitive and easy to use.

Alle Geräte

PRTG saves you money

All licenses for on-premises versions of PRTG are valid for indefinite periods of time. Every license comes with the full range of features. The cloud-based version of PRTG (PRTG Hosted Monitor) also offers subscription-based licenses that can be upgraded (or downgraded) at any time.


PRTG leaves nothing to chance

PRTG monitors around the clock. The network monitoring software runs in the background, keeping a constant eye on all the components in the IT infrastructure so administrators can focus on other work. PRTG provides detailed and comprehensive data and reports – and issues alerts when errors occur or threshold values are exceeded.



The all-in-one monitoring tool

PRTG is perfect for companies of all sizes: whether you use PRTG Network Monitor, PRTG Hosted Monitor, or  PRTG Enterprise Monitor, you always get the whole package. Instead of using a multitude of tools to monitor all the aspects of your infrastructure, PRTG easily does the trick. After all, every version of PRTG comes with much more than just a LAN scanner. Our tool monitors your entire IT infrastructure – i.e., your WAN, WLAN, and VPN networks, as well as your physical and virtual environments.


PRTG the multi-tool

PRTG: The multi-tool for sysadmins

Adapt PRTG individually and dynamically to your needs and rely on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects via HTTP requests
  • Custom sensors: Create your own PRTG sensors for customized monitoring
  • Custom notifications: Create your own notifications and send action triggers to external systems
  • REST Custom sensor: Monitor almost everything that provides data in XML or JSON format


Still not convinced?



More than 500,000 sysadmins love PRTG

Paessler PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.

Still not convinced?


Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.



Try Paessler PRTG for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free. Start now with your trial.




Network Monitoring Software - Version (February 14th, 2024)


Download for Windows and cloud-based version PRTG Hosted Monitor available


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Up to 100 sensors for free (Price List)

Unified Monitoring

Network devices, bandwidth, servers, applications, virtual environments, remote systems, IoT, and more

Supported Vendors & Applications

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