PRTG is your professional
SNMP Port Analyzer

  • Individual port bandwidth monitoring
  • Port notification
  • Avoid port exhaustion with PRTG


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

Monitor your ports with SNMP


Individual Port Bandwidth Monitoring

Individual Port Bandwidth Monitoring

Would you like to have detailed traffic reports on each port of
your device? 

Port Notification

Port Notification

You can be alerted if your TCP/IP ports are open
or closed.

Avoid port exhaustion

Avoid port exhaustion

Have you ever run out of ports to your application servers and wish you were notified? PRTG Network Monitor can alert you so you know in advance before your ports are all used.

How PRTG can help


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.)

SNMP Traffic Sensors

SNMP Traffic Sensors

PRTG Network Monitor can help solve all of these issues for you. Our SNMP Traffic Sensors will monitor your overall device, plus each individual port so you get the detailed overall picture. In addition, PRTG Network Monitor can send you notifications so you know if your TCP/IP and UDP ports are available or not.

Network communication

Network communication

Communication in every infrastructure relies on the network. If one switch runs out of ports then there is a server, client machine or a device that will not be able to communicate with the rest of the infrastructure. A breakdown like that can cause a delay in business and a loss of productivity or profit.

Optimize your infrastructure

Optimize your infrastructure

With PRTG Network Monitor you can avoid being surprised with port exhaustion. You can also monitor the bandwidth and usage of your switches and routers on a port-by-port basis. By default, PRTG keeps raw data for a year so you can track trends to help you optimize your infrastructure. It is always better to know about a problem before it happens rather than after and PRTG can help you do that. 

Your SNMP monitor 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!


4 Sensors for your SNMP Port Analyzer

SNMP Traffic Sensor

SNMP Traffic Sensors

PRTG uses SNMP to collect information about your ports on your routers and switches. The channels in the SNMP Traffic Sensor includes Discards In/Out, Errors In/Out, Non-Unicast In/Out, Traffic In/Out/Total, Unicast In/Out and Downtime

Sensor Factory Sensor

Sensor Factory Sensor

If you want to average or total the channels from various ports you can use the Sensor Factory Sensor to do calculations from several different sensors and report/alert on the averages or totals. 

Port Sensor

Port Sensor

The PRTG Port Sensor will monitor each individual port by connecting to its TCP/IP port number and you can configure PRTG to let you know if the port is open or closed. You can also send the port a command through a telnet session through the sensor and have PRTG check the response.

Port Range Sensor

Port Range Sensor

The Port Range Sensor monitors and alerts on a range of ports on a network service or device. It can show the number of open ports, the number of closed ports, and the time it takes for the request to be accepted. You can also set alerting limits for the number of closed or open ports.

This is what SNMP monitoring looks like in PRTG


PRTG simplifies your day!

Our SNMP server monitoring software really helps you doing your job and promptly notifies you if something is wrong. 
PRTG lets you concentrate on your day-to-day tasks with total peace of mind.

PRTG saves time

PRTG is an easy and intuitive SNMP server monitor. You get one central monitoring tool with which to monitor your network via SNMP and SNMP traps. The dashboard provides a quick overview at all times - whether on your desktop or as an app.

PRTG saves worry

Setting up PRTG is quick and easy. Dozens of SNMP sensors are available as well as user-defined sensors compatible with the various SNMP versions and adapted to specific manufacturers.

PRTG saves money

80 % of our customers report substantial savings in the area of network management. And license costs pay for themselves in an average of only 3 1/2 months.

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


  • 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


Need more info? See our PRTG Manual for detailed configuration instructions. 

“We can all work with greater peace of mind knowing that our systems are constantly
being monitored.”

Markus Puke, Network Administrator, Schüchtermann Klinik, Germany

problems with SNMP Monitoring? Put the PRTG Tester to work!

Having an issue with your SNMP monitoring? A sensor reports an error - but you can't see why? Use our SNMP Tester to get to the root of the problem. With this tool, you can make SNMP inquiries and obtain detailed log files. If you cannot find the bug, simply send the log files to our support team. In this way, we can help to solve your problem. 

Quote Tech Support

“Hey Luciano, what would you tell administrators looking to set up SNMP monitoring with PRTG?”

“With PRTG, you not only get the many standard sensors which exist for SNMP monitoring, but also the ability to monitor devices even without having a native sensor for them. You can thus monitor practically any SNMP-compatible device! First of all, obtain the relevant MIB file containing a definition of all available OIDs from the manufacturer of your hardware. Then use the MIB importer to make the MIBs available to PRTG, and create an SNMP library sensor. Finally, select the properties of the target device you’d like to monitor, and within no time at all you’ll have the data you need!”

Luciano Lingnau works in PAESSLER AG's technical support department. Find out more on this topic by consulting his answer in our knowledge base.

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

email course snmp monitoring

TIP: You are still new to SNMP monitoring and need a
little support?

Paessler offers a free, 4-part email course on how to use SNMP for network monitoring which will help you improve your network operations.

Sign up here for our free email coaching and learn to use SNMP in the best way.

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 (November 24th, 2020)


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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