Network Discovery with PRTG

  • Find network devices automatically
  • Nonstop network monitoring
  • Cross-locational monitoring
  • Detect new devices immediately
  • Custom alarm system

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

Three reasons for taking stock of your network

How do I find all my network devices? Sooner or later, every administrator must tackle this question.
In general, there are three reasons for taking stock of your network with a network discovery tool:

 Network inventory

Network inventory

Administrators perform regular inventories in their companies. These inventories are not only done to get an overview of the network, but also for security reasons: An inventory will let you see if unwanted private devices are connected to your network.

 Network expansion

Network expansion

When a company grows, so does its network. Many administrators are faced with the task of gradually expanding their networks. When doing so, network devices must be routed correctly to ensure the network remains stable and efficient.

 Network costs

Network costs

Increasingly, accounting departments are also keeping an eye on networks. It is important that all costs associated with network devices, maintenance, and licenses be recorded. To do so, administrators must have an overview of their hardware and software. Taking stock of the network can help.

Discover and monitor network devices automatically:

We'll show you how in 2 short minutes!


Six good reasons
to choose PRTG
to monitor your network devices

Automatic stock taking

The PRTG Auto Discovery feature makes it easy to take stock of a network. This feature will automatically find all the network devices within an IP address range, and then integrate them into your monitoring.

Discovery of new devices

When opening PRTG for the first time, new devices will be detected and set up automatically. PRTG lets you create your own timetable: run the discovery automatically, either daily, weekly, or monthly. Each time, you’ll receive a ticket and an e-mail. And that means you’ll be able to keep a constant eye on what’s going on in your network.

Nonstop network monitoring

PRTG monitors your network 24 hours a day, 365 days per year - and not just at irregular intervals. You’ll therefore be able to discover those devices which may have been turned off during a one-time scan.

Alerts when the network malfunctions

At the slightest problem, you’ll be notified at once. Our alerts enable you to act quickly and avoid more serious disruptions. The alarm system is individually customizable.

Cross-locational network discovery

PRTG makes it easy to discover and monitor network devices that are spread out over several different locations. The centralized monitoring of distributed sites functions via remote probes, which run as a Windows service on a server in each of the respective locations.

Overview of all network devices

Each network device is set up by PRTG in a device tree. A simple and easy-to-understand dashboard illustrates the status of your network and of each individual device by way of a traffic light system. The dashboard is available on your desktop, or as an app for when you’re out of the office.

Your monitoring dashboard might look like this!

AU Wireless

“Thanks to PRTG, we no longer need to worry about our network. We can sit back and relax knowing that powerful software is checking hundreds of network devices every 30 seconds. PRTG is so reliable that we almost always forget it is there – until we receive a message that something is wrong.”

Chadwick Wachs, Owner of Au Wireless. To the case study

A sneak peek at network discovery with PRTG


How the PRTG Auto Discovery feature works, in three steps



i Ping is a command-line utility, available on virtually any operating system with network connectivity, that acts as a test to see if a networked device is reachable. The ping command sends a request over the network to a specific device. A successful ping results in a response from the computer that was pinged back to the originating computer.
Read more

The Auto Discovery feature provides for the quick and convenient detection of all your network devices. PRTG automatically sets up devices in the network tree, and then equips them with sensors. Auto Discovery is described in detail in the PRTG manual. This is how it works:

Step 1

Enter the IP address range within which PRTG should search for network devices. Then launch the Auto Discovery feature; PRTG will use ping to find all the devices located within this IP range.

Step 2

Next run a scan to identify the types of devices which were found. Appropriate sensors will be created automatically. To do so, PRTG uses SNMP, WMI, and other protocols.

Step 3

All devices found by PRTG are then set up in a device tree. PRTG uses a number of device templates for this process. Whether Microsoft, Cisco, Dell, or Juniper: Corresponding devices are available for all the big manufacturers.

Quick results

PRTG sets up your network monitoring automatically and within minutes. You can fine-tune this initial monitoring over time. And while the runtime of Auto Discovery depends on the size of the designated IP range, the number of devices found, your network connection, and some other latency factors, once it is launched there is nothing else for you to do except adjust a few of its settings (such as “credentials”).

PRTG simplifies your day

Our monitoring software works for you and promptly notifies you of potential issues.
It frees you to concentrate on your day-to-day tasks with peace of mind.


PRTG saves time

With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

PRTG saves worry

Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the PRTG auto-discovery and pre-configured device templates.

PRTG saves money

80% of our customers report substantial or even exceptional cost savings in the area of network monitoring. The experience shows that the costs for licenses have paid for themselves within a matter of weeks.


Your Network at a glance
– even on the go

PRTG can be started within minutes and it's compatible with many mobile devices.


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, and more, in one view!


Trusted by 200.000 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.”

Read more reviews

“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.”

Read more reviews

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

Read more reviews

  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

Six handy PRTG sensors

iWhat is a sensor?

In PRTG, “Sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, e.g. the traffic of a switch port, the CPU load of a server, the free space of a disk drive. On average you need about 5-10 sensors per device or one sensor per switch port.

View video (3:26 min.)

Ping Sensor

The Ping Sensor verifies the availability of each and every device in your network. One of the most commonly used PRTG sensors, the Ping Sensor also displays ping time. The Cloud Ping Sensor is also used frequently. More on ping monitoring

SNMP sensors

SNMP sensors show you which applications are putting the most strain on your servers and bandwidth. SNMP is extremely reliable and takes up very little system load. More on SNMP monitoring

WMI sensors

For Microsoft devices, you can use our WMI sensors. The “System Information” feature, which is built into an extra tab, provides information on Windows systems, installed hardware and software, and much more. More on WMI monitoring

Packet Sniffer Sensor

The PRTG Packet Sniffer Sensor monitors the data traffic in your network, and can filter according to mail traffic, file transfer traffic, and infrastructure traffic, among others. More on packet sniffing

NetFlow sensors

The NetFlow protocol is mainly supported by Cisco routers and Cisco switches. PRTG supports all NetFlow versions. More on NetFlow monitoring

jFlow sensors

jFlow lets you monitor Juniper Networks hardware, among others. Here too you can configure devices especially for PRTG. It features a high degree of similarity to NetFlow5. Find out more about our jFlow sensor


Over 95% of our customers recommend PRTG


Paessler AG worldwide trialled PRTG in over 600 IT departments.
The aim was to tune the network monitoring software closer to the needs of the administrators.
The result of the survey: over 95% of the participants would recommend PRTG - or already had.

Recommend PRTG

PRTG is a vital tool for getting your IT into tip-top shape!

The costs for a one-year PRTG license pay for themselves in an average of only a few weeks.
License costs vary according to the size of your network.

PRTG makes
your network more reliable

PRTG improves the reliability of your network

PRTG saves
network management costs

PRTG saves network management costs

PRTG saves time
spent on network management

Detect network loops with PRTG

A network or switching loop can have a negative impact on the performance of your network. Such a loop may even lead to an outright network crash. The PRTG Packet Sniffer and NetFlow sensors will help you identify network loops, by highlighting the frequent appearance of duplicate data packets, for example. These sensors monitor incoming data packets, and filter traffic according to IP addresses, protocols, and data types.

“Hey Dirk, what do you think about network monitoring?”

“Without network monitoring, it can easily take several hours to locate a network error, such as identifying a router which isn't working properly. Costs can quickly pile up due to unused man days. With a monitoring service, the amount of downtime can be minimized and in many cases even proactively eliminated. With our PRTG monitoring tool, we hope to simplify the job of administrators so they can go about their work efficiently and with less stress.”

Dirk Paessler, founder of Paessler AG

Network scanners vs. PRTG:
Similarities and differences

Network scanners

Many administrators are in search of simple network scanners or tools that are 100% dedicated to network discovery. In such cases, it’s not about setting up monitoring, but discovering available devices as quickly and easily as possible. We too have used these tools in the past, such as “Angry IP Scanner,” when our company moved into its new offices.

Network monitoring

PRTG is a comprehensive network monitoring tool. Device discovery is the first step to the setting up of monitoring. PRTG offers considerably more than a simple network scanner. With PRTG, you can monitor servers, databases, websites, and much more. PRTG comes with pre-configured sensors for a number of different manufacturers, including Cisco, HP, and Dell.

Complementary tools

PRTG should not be seen as a rival to a simple scanner. Each is used in different circumstances. PRTG is convenient for taking over the tasks of scanner tools. On the other hand, some situations call for a simpler tool, such as for a short test when you don’t need detailed monitoring but only a quick overview.

PRTG: The swiss army knife for sys admins

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

  • HTTP API: Access monitoring data and manipulate monitoring objects using HTTP requests
  • Custom Sensors: Create your own sensors for customized monitoring
  • Custom Notifications: Create your own notifications to send alarms to external systems
  • New REST API Sensor: Monitor almost everything that provides XML or JSON

Eine Standardinstallation von PRTG besteht aus Server und Local Probe

Want to learn more? Please do!

White paper: Discovering and monitoring distributed networks

Many companies have offices in several different locations. The remote probes of PRTG let you monitor all your network locations centrally. In our white paper, we explain the architecture behind PRTG and explore specific network topology scenarios. To the white paper

IP SLA Monitoring

PRTG monitors the quality of your VoIP-connections. By preventing malfunctions and verifying service level agreements, you’ll save time and money. Read more about IP SLA Monitoring here.

German quality

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime



Made in Germany: The PRTG Network Monitoring Tool is the fruit of an engaged team. The company was founded by Dirk Paessler. The Paessler AG headquarters are located in the city of Nuremberg, in the heart of Germany. We combine typical German virtues such as high quality standards, industriousness, and commitment with international, cosmopolitan flair. Read more about our firm here. By the way: We are regularly looking for new recruits.

Case Studies: Airports, utility companies, banks, colleges, hospitals: PRTG is present in every industry. For each of our customers, business and organizational processes depend on the proper functioning of the network infrastructure. The PRTG customer satisfaction is close to 100%. Read in our case studies how our customers use PRTG.

Product tests: It goes without saying that we are convinced by the quality of PRTG. But what about the others? PRTG has always performed extremely well in tests. PRTG user “LanLine” sums it up best: “PRTG was already good several years ago, and has gotten better from version to version ever since.” Such has been our steadfast and sincere goal. Read more about monitoring software product tests and comparisons here.

Support: Our support team works hard every day to help customers solve their monitoring problems. Our goal is to resolve all inquiries within 24 hours (on business days). We've drafted a comprehensive manual and built up an extensive knowledge base featuring videos, webinars, and FAQs. All support, of course, is also included!

Getting started is easy: The trial version is free, which means you can try our monitoring tool risk-free. To switch to another version of PRTG, simply search for an appropriate license. You can upgrade any time you like.




Network Monitoring Software - Version (January 22nd, 2020)


Download for Windows and hosted version 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