Monitor Network Traffic with
All-in-One PRTG Monitoring

  • PRTG monitors network traffic
  • PRTG monitors data packets
  • PRTG filters according to IPs, protocols, and data types
  • PRTG uses SNMP, packet sniffing, WMI, NetFlow

Looking to capture network traffic? Here are three
typical situations where PRTG comes in handy


Network Monitoring, Network Analysis and Network Diagnostics

Saving time, worry, and money is easy with PRTG.


Gaining an overview

As a responsible administrator, you hope to obtain an overview of how much traffic is flowing through your network. PRTG lets you optimize network capacity planning. You can also determine if your full data allowance is actually being used, or if you need to buy more or can make do with less.

Analyzing a network

Is your company’s Internet connection becoming less and less reliable? Errors occur in the network – but you don’t know why? With PRTG, you get a network traffic tool that analyzes your data consumption and uncovers the causes of network disruptions. You’ll also identify bottlenecks and security leaks. 

Optimizing a network

Every network has a bandwidth hog. It might be an individual application, video stream, or overloaded WLAN. But it could also be a simple print job containing some big files that are temporarily clogging the network. PRTG Network Analyzer allows you to identify bandwidth hogs and therefore optimize your consumption of data.

Looking for a network traffic tool that will let you keep
a constant eye on your network traffic
– even while 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!


That's why PRTG is your network traffic analyzer

One tool for everything

PRTG monitors every part of your network. Traffic, uptime, servers, routers, switches: PRTG is an all-in-one monitoring tool for your entire network. When problems arise, you’ll benefit from a complete overview that is available instantly. With PRTG, finding the sources of errors is quick and easy. And that means you'll save both time and frustration.

Network reporting tool

The PRTG Network Traffic Tool collects all data and displays it in easy-to-read charts and graphs. The results are also sent to a reporting system, which you can configure to meet your own specific needs. With PRTG, data access is customizable. Find out more about the Reports feature.

Prompt alerts

Configure PRTG to send you an alert when certain situations arise. PRTG will notify you well in advance - such as when a sensor reveals a problem, but the network device is yet to fail. This means you can react immediately - before the error leads to something more serious. 

The right technology

PRTG uses the following key technologies as traffic analyzer: SNMP, packet sniffing, Flow, WMI, and performance counters. Whether you’re dealing with Windows Server or a Cisco router: with PRTG, you always have the right technology for your monitoring, right at your fingertips.

Long-term analysis

PRTG lets you capture network traffic over the long-term and analyze historical data. You will see if peak loads occur at regular intervals over longer periods of time. If so, you can quickly get to the root of the problem. 

Example: Case Study

“PRTG lets us constantly work in accordance with the two-man rule. PRTG notifies us immediately if something is wrong in our network. Thanks to PRTG, we can use our time and resources for the things which really demand our attention.”

Brad Mennen, System Administrator at Hume Bank in Australia. Hume Bank uses PRTG to monitor its LANs, WANs, servers, website, applications, and much more.
To the case study

Four traffic monitors:
A comparison




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 (4:34 min.)



SNMP puts very little strain on the CPU and network loads. But it still provides for a complete overview. Detailed network analysis (including traffic filters) is however not possible. Find out more about the SNMP Traffic Sensor.

Packet Sniffer

With packet sniffing, data traffic can be analyzed according to IP addresses, protocols, and types of data. This method, however, generates much higher CPU and network loads. Read more about the Packet Sniffer Sensor. 

Flow technologies

Flow technologies (NetFlow, IPFIX, jFlow, sFlow) are best suited for Cisco, Juniper, and HP routers, but are used by other manufacturers as well. Flow technologies are particularly adapted for larger networks. Read all about our Flow sensors.

i NetFlow is a protocol for collecting, aggregating and recording traffic flow data in a network. NetFlow data provide a more granular view of how bandwidth and network traffic are being used than other monitoring solutions, such as SNMP. NetFlow was developed by Cisco and is embedded in Cisco’s IOS software on the company’s routers and switches and has been supported on almost all Cisco devices since the 11.1 train of Cisco IOS Software. Read more ...


Windows Management Instrumentation (WMI) lets you monitor Windows Server. Compared to the other monitors, WMI takes up the most network resources. SNMP is a good alternative if you are looking to save network space. Find out more about our WMI and performance counter sensors.


An overview: WMI, SNMP, packet sniffing, xFlow





Packet Sniffer

xFlow (IPFIX, NetFlow, sFlow, jFlow)




Easy to complex (depending on filter rules used)

Can be complex (e.g., the switch must be configured)

Traffic can be filtered





Differentiate bandwidth usage by protocol or IPs





PRTG can show Toplists (Top Talker, Top Connections, Top Protocols, custom)





Filter bandwidth usage by IP





Filter bandwidth usage by MAC address





Filter bandwidth usage by physical network port





Monitor network parameters other than bandwidth usage





CPU load on the machine running PRTG



Higher, depends on the amount of traffic

Higher, depends on the amount of traffic

Excess bandwidth usage of monitoring



None (except when monitoring switch ports are used)

Depends on the traffic

Definition, tools, alternatives


Network traffic

Vast amounts of data flow through every network owned by a company or organization. Emails, video files, website visitors...Network traffic never ceases to rise, in every sector and business. If you’re an administrator, that means you’re constantly looking for ways to optimize the performance of your network.

Traffic monitoring tools

Administrators often search for appropriate tools with which to observe, measure, and analyze their traffic. Some of the available tools include free ones which allow for a detailed look into a network’s live data. Wireshark, for example, captures live, unfiltered network traffic. But unless you know what to look for, analyses can be extremely difficult to perform. Luckily, PRTG provides clear, long-term data recording to get you on the right track.


Administrators are faced with the question of whether to use several small tools, or install one central tool with which they can analyze all their network traffic. In its trial version, PRTG is free of charge.

PRTG is worth it: You’ll optimize your entire IT!

The costs for a one-year PRTG license usually pay for themselves within a few weeks

PRTG improves the reliability of your network

PRTG improves the reliability of your network

PRTG saves
network management costs

PRTG saves network management costs

PRTG saves time
spent on network management

For administrators, PRTG means...

Less Help Desk support

Less Help Desk support:
With PRTG, your network is unmistakably more stable. And that results in fewer Help Desk requests. Let’s face it: the Help Desk can be quite the odious task, especially when problems and complaints are pressing and complicated. Save yourself this hassle with PRTG.


More time for hardware:

More time for hardware:
Our network monitor and alarm system allow you to concentrate on the important and enjoyable tasks in your day-to-day work with total peace of mind. Take the time to leisurely install new hardware, for example.



Optimization: PRTG lets you monitor your network traffic on a permanent basis. Thanks to historical data, you'll receive a long-term database and can constantly optimize your network.


 More time for evaluations

More time for evaluations: PRTG makes evaluating new hardware and applications a breeze. Network monitoring with PRTG is fun! Every day, you’ll get to know your network a little bit better.


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

Steffen Ille, Bauhaus-University of Weimar, Germany.

Award winning solution

We work hard on making our software as powerful and easy-to-use
as possible for our customers each and every day.
Of course it makes us proud when we get awards for that.



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


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.



Want to read more?
Please do!

SNMP Monitoring: PRTG comes with several preconfigured SNMP sensors. Head over to our SNMP Monitoring page to learn just how SNMP works, as well as how to set up SNMP monitoring and where obstacles can lie. 

Packet Sniffing: The PRTG Packet Sniffer Sensor monitors web traffic, mail traffic, file transfer traffic, and much more. Check out our section on packet sniffing to find out how to set up the Packet Sniffer Sensor, and to get an idea of the advantages and disadvantages that come with this technology. 

NetFlow Monitoring: The NetFlow protocol is mainly supported by Cisco routers and switches. On our NetFlow page, you’ll learn all you need to know about the various Flow technologies and how to configure their sensors.



Network Monitoring Software - Version (April 11th, 2018)


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

More >>