PRTG is your professional
SNMP port analyzer
Individual port
bandwidth monitoring
Port
notification
Avoid port
exhaustion with PRTG
Monitor your ports with SNMP
Individual port bandwidth monitoring
Would you like to have detailed traffic reports on each port of your device?
Port notification
You can be alerted if your TCP/IP ports are open or closed.
Avoid port exhaustion
Have you ever run out of ports to your application servers and wish you were notified? PRTG can alert you so you know in advance before your ports are all used.
How PRTG can help
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. 
How PRTG defines sensors
SNMP Traffic Sensors
PRTG 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 can send you notifications so you know if your TCP/IP and UDP ports are available or not.
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
With PRTG 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.
4 Sensors for your SNMP port analyzer
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
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
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
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.
Need more info?
See our PRTG Manual for detailed configuration instructions.
This is what SNMP monitoring looks like in PRTG
Sensor SNMP Hardware Status: Status of a printer
Sensor SNMP Linux Load Average
Overview SNMP Traffic Total
PRTG makes your job easier
Our monitoring software frees you to focus on other tasks by promptly notifying you of potential issues.
Save effort
PRTG gives you one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.
Save time
Getting started with PRTG is a breeze. Setting up or switching from another network monitoring tool is easy thanks to the auto-discovery and pre-configured device templates.
Save money
80% of our customers report substantial cost savings with network monitoring. Your costs of licenses will likely pay for themselves within weeks.
Markus Puke, Network Administrator, Schüchtermann Klinik, Germany
“We can all work with greater peace of mind knowing
that our systems are constantly being monitored.”
Your SNMP monitor at a glance – even on the go
PRTG is set up in a matter of minutes and can be used on a wide variety of mobile devices.
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.”
“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.”
“The tool excels at its primary focus of being a unified infrastructure management and network monitoring service.”
Support: 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.
“Easy to implement and configure with good technical support.”
R. v. S., ICT Manager at Heinen & Hopman Eng BV
“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.
We asked: would you recommend PRTG?
Over 95% of our customers say yes!
Paessler AG conducted trials in over 600 IT departments worldwide to tune its network monitoring software closer to the needs of sysadmins.
The result of the survey: over 95% of the participants would recommend PRTG – or already have.
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.
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PRTG |
Network Monitoring Software - Version 23.2.84.1566 (May 24th, 2023) |
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Hosting |
Download for Windows and cloud-based version PRTG Hosted Monitor available |
Languages |
English, German, Spanish, French, Portuguese, Dutch, Russian, Japanese, and Simplified Chinese |
Pricing |
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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