Network troubleshooting with PRTG:
Discover causes, solve problems


  • Use sensors to narrow down
    possible causes

  • Avoid problems in the future


  • Solve network problems
    in 3 easy steps


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.






Network troubleshooting: Now and in the future

Now: Solve network problems quickly

Errors, disruptions, failures...all network problems are serious. When a network problem occurs, the technical support department gets inundated with complaints, most of which are vague at best (“My connection is down”). The cause is often unknown – and can lie in many different places. Network devices, bandwidth, applications, security software? For admins, the stress has just begun.

How PRTG can help: Our network monitoring software helps you narrow down the search. Its sensors provide information and clues that enable you to quickly exclude certain causes.

In the future: Avoid network problems

The more complex the IT infrastructure, the more vulnerable it is to errors. Sooner or later, sysadmins have to find a way to maintain the performance and availability of their network. To do so, they need a constant overview of the network’s processes and components.

How PRTG can help: PRTG monitors your IT infrastructure 24 hours per day, 7 days a week. With PRTG, you’ll immediately recognize unusual network loads and minor malfunctions, and can intervene before real problems arise.


Sensors to help you
take control of your network

The staples

The SNMP Traffic Sensor, NetFlow v5 Sensor, Packet Sniffer Sensor, SNMP CPU Load Sensor,  and WMI Memory Sensor are the five most widely used PRTG sensors. These sensors will tell you if your devices are working properly and provide you with detailed traffic data filtered by IP address, protocol, application, and more. As a result, they help speed up the troubleshooting process.

250+ sensors:

With PRTG, you get access to over 250 preconfigured sensors for everything from hardware, applications, cloud services, and the quality of service of your VoIP. You also get customizable, user-defined 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.)


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.





3 steps to effective network troubleshooting:

Problems with large file transfers

Step 1:
Identify the problem

Easier said than done – sysadmins must be able to recognize the problem in the first place. Most network errors are overlooked until they become critical and cause more serious disruptions. Time is therefore of the essence. The quicker you spot a problem, the better. To do so, you’ll need an overview of your entire network.

Slow applications

Step 2:
Discover the causes

More often than not, IT managers start out by entering commands such as ping, traceroute, IPconfig, and netstat in their Windows command line. These commands can root out the whereabouts of possible causes in a matter of seconds. Otherwise, you’ll need to start searching for more comprehensive network troubleshooting tools or start checking if there are connectivity issues like problems with the internet configuration.

Malfunctions when backing up

Step 3:
Solve the problem

Every network problem can be traced to an underlying cause. For example: A hard drive running at full capacity can cause a server to fail. Neglecting to update a switch can cause the switch to malfunction and lead to disruptions in network traffic. Faulty network settings and external attacks are also common culprits. A reboot is the most popular solution to these problems. And while they are often effective, reboots do not address the underlying causes of problems.



Inside PRTG:
A sneak peek at our network troubleshooting flowchart


“The consistent use of troubleshooting flowcharts allows us to standardize the troubleshooting process and keep downtime to a minimum.”

Sascha Neumeier, PAESSLER AG IT Department


Trusted by 300,000 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



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.


A sneak peek at network troubleshooting with PRTG

An eye on all your hardware

Server problems, faulty switches, router disruptions...PRTG lets you keep an eye on all your hardware. Our software comes with preconfigured sensors for all the biggest manufacturers, as well as customizable, user-defined sensors.


PRTG is all-inclusive software. You get access to all types of sensors (including those for Cisco at no extra charge), the alarm, reports, and our many tutorials. PRTG is designed with all the features you'll need to monitor your entire network.

Free trial

Interested in testing our software and comparing it with other network troubleshooting tools? Please do! Give the full range of PRTG features and sensors a try for 30 days free of charge. After the trial period, continue using 100 sensors for as long as you want. You can also opt for a license based on the number of sensors required by your company.


Analysis: 2 devices that cause lots of problems


Many networks use switches from a variety of different manufacturers. At least some of these switches are inevitably outdated. All switches must be updated at some point or serviced in some other way. As a result, they are often at the root of problems. Switches tend to serve as bottlenecks and can lead to connectivity issues. If a switch malfunctions, the entire network can suffer. PRTG keeps a constant eye on your switches.


With routers, a similar problem arises. Networks use lots of different types of routers from lots of different manufacturers. If a router fails, your LAN and WLAN connections will immediately suffer. Individual ports can also be affected. PRTG monitors open and closed ports around the clock. If a port is affected, you’ll be notified at once.


11 tips for network monitoring (PDF)

Hardware problems, downtime, backups, performance issues: sysadmins are confronted with many different issues during the course of a day. In this PDF, we take a closer look at these issues and offer tips, strategies, and solutions. To the white paper


Other topics related to network troubleshooting

Syslog monitoring

Our network monitoring tool retrieves and analyzes syslog messages. If it comes across syslog events or error messages, you’ll be notified at once. More on syslog monitoring, including tutorials


Network diagnosis

Network diagnoses delve deeper into the troubleshooting process. There are several diagnosis tools on the market, including Wireshark. However, these tools tend to be highly specialized. With PRTG, you can rule out many error sources in advance. More on network diagnosis tools.

Website monitoring

Is your website taking more and more time to load? Is downtime becoming an issue? Or maybe certain functions are no longer working at all? PRTG monitors availability and other parameters to ensure your company’s website runs smoothly. More on website monitoring.


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


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 26th, 2021)


Download for Windows and hosted version available


English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese


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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