Paessler PRTG

Analyze your ports and maximize network security & performance with PRTG

  • Monitor individual TCP/IP and UDP ports, and your entire network
  • Track port bandwidth usage and other key port health stats
  • Get alerted about performance issues and security risks

Our users give top ratings for monitoring with Paessler PRTG



PRTG makes SNMP port analysis easy

Custom alerts and data visualizations make it easy to monitor, identify, and prevent port congestion, security vulnerabilities, and other network performance  issues.











Are you expecting too much from your ports?

that won't send. Frozen screens. Dropped connections.

Overloaded or underperforming ports cause all sorts of annoying and disruptive issues. And that's before we even talk about the security risks…

Paessler PRTG port analyzer uses SNMP to monitor the health of all ports across your network, so you can prevent outages, keep your colleagues productive, and shut bad actors out of your network.





Keep data flowing safely at speed with your SNMP port analyzer PRTG

Optimize your infrastructure

Manage your network and the communication between all elements in your infrastructure more effectively. PRTG works tirelessly in the background, tracking key stats and letting you know a port is close to overloading before it actually happens, so you can prevent outages.

Strengthen network security

With so much on your plate, potentially critical security issues can easily go unnoticed. PRTG keeps a close eye on switch ports, router ports, server ports, and other network infrastructure, rooting out weak spots like open ports before bad actors can exploit them.

Troubleshoot with ease

PRTG stores raw data for a year by default. That means you can go back as far as you need to pinpoint when a problem started. Plus, you can spot trends and take proactive action. Like ensuring you don't find yourself with too many devices and not enough ports.



IT experts agree: Paessler PRTG is a great solution for IT infrastructure monitoring


“All-around winning
network monitor”

logo it brief

“The real beauty of PRTG is the endless possibilities it offers”


“Outstanding cloud


Start conducting SNMP port analysis with PRTG and see how it can make your network more reliable and your job easier.








What SNMP port analysis looks like in PRTG

Diagnose network issues by continuously monitoring ports across your network. Show port status, data transfer speed, and other key stats in real time and visualize data in graphic maps & dashboards to identify problems more easily. Gain the visibility you need to troubleshoot speed issues, security vulnerabilities, and other network performance problems. 


Your SNMP port analyzer at a glance – even on the go

Set up PRTG in minutes and use it on almost any mobile device.


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 in one view!


vendors vm ware



Easily find the source of the problem with our PRTG SNMP port analyzer solution

Real-time alerts and custom notifications make it easy to solve port congestion, errors, security vulnerabilities, and other issues.



“Excellent tool for detailed monitoring. Alarms and notifications work greatly. Equipment addition is straight forward and server initial setup is very easy. ...feel safe to purchase it if you intend to monitor a large networking landscape.”

Infrastructure and Operations Engineer in the Communications Industry, firm size 10B - 30B USD

Read the entire review at Gartner Peer Insights 








Comprehensive port analysis on autopilot

PRTG's sophisticated, preconfigured sensors track individual ports – and your network as a whole.

SNMP Traffic sensor

Monitor traffic on a specific device with our SNMP Traffic sensor, including:

  • The number of incoming & outgoing discarded and (non-)unicast packets
  • The incoming and outgoing errors and total traffic
  • The number of unknown, incoming protocols

Port v2 sensor

Use our Port v2 sensor to check the following:

  • The number of open and closed ports
  • The number of errors
  • The maximum connect time


Port Range sensor

Keep an eye on all available TCP/IP ports within a specific range. PRTG's  Port Range sensor tells you:

  • The number of open ports
  • The number of closed ports
  • The time until requests to ports are accepted

Sensor Factory sensor

Unsure how many port channels are available on your network? Our Sensor Factory sensor is a custom sensor whose channels are based on data from other source sensors.

This way, you can work out averages and totals, so you don't have to check every port individually.


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.


PRTG makes SNMP port analysis easy

Custom alerts and data visualizations make it easy to monitor, identify, and prevent port congestion, security vulnerabilities, and other network performance  issues.



Create innovative solutions with Paessler’s partners

Partnering with innovative vendors, Paessler unleashes synergies to create
new and additional benefits for joined customers.


By integrating PRTG with Martello iQ, you can add a fast analytics layer to improve uptime, visualize your IT environment, and integrate all of your IT systems into a single pane of glass.

Read more


Integrating monitoring results from PRTG into NetBrain maps makes the foundation for network automation.

Read more


Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.

Read more


Analyze ports: FAQ


1. What is a port?

Ports are endpoints that make it easier for all the different processes and services on your network to talk to each other. When ports are working as they should, data flows freely and your network runs smoothly. But when ports are misconfigured or have other issues, they can slow your network down and make you more vulnerable to trojans and other security risks.

2. What's the difference between port monitoring and port scanning?

Port monitoring is like surveillance, while port scanning is an inspection. A port monitoring tool helps you track overall performance and identify long-term trends. A port scanner, on the other hand, is how you spot potentially imminent threats, such as ports that are open when they should be closed.

3. How does PRTG SNMP port analyzer work?

PRTG SNMP port analyzer continuously collects information about the ports on your network using SNMP. It can identify how many ports are open, how many are closed, which devices, applications, or other services are connected to them, and each port's response time.

4. How can I monitor ports using SNMP?

Monitoring ports using Simple Network Management Protocol (SNMP) involves configuring SNMP on the network devices and then using an SNMP port analyzer tool to collect and analyze data. Here are the general steps to monitor ports using SNMP:

  1. Enable SNMP on network devices: 
  • Access the device's management interface (often a web interface or command line).
  • Locate the SNMP settings and enable SNMP.
  • Configure SNMP community strings (read-only and read-write) for security.


    2. Identify OIDs for port monitoring:

  • Object Identifiers (OIDs) represent different parameters you can monitor with SNMP.
  • Common OIDs for port monitoring are in the IF-MIB (Interface MIB). The main OID for interface statistics is ifTable (


    3. Set up PRTG as your SNMP port analyzer:

  • Install and configure PRTG’s sensors for port analysis with the SNMP community strings and target device IP addresses.

5. What is a sensor in PRTG?

In PRTG, “sensors” are the basic monitoring elements. One sensor usually monitors one measured value in your network, for example the traffic of a switch port, the CPU load of a server, or the free space on a disk drive.

On average, you need about 5-10 sensors per device or one sensor per switch port.


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.


Recommend PRTG


PRTG the multi-tool

PRTG: The multi-tool for sysadmins

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

  • HTTP API: Access monitoring data and manipulate monitoring objects via HTTP requests
  • Custom sensors: Create your own PRTG sensors for customized monitoring
  • Custom notifications: Create your own notifications and send action triggers to external systems
  • REST Custom sensor: Monitor almost everything that provides data in XML or JSON format


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.


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.



Paessler PRTG 

Start conducting SNMP port analysis with PRTG and see how it can make your network more reliable and your job easier.




Network Monitoring Software - Version (April 10th, 2024)


Download for Windows and cloud-based version PRTG Hosted Monitor 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

cisco logo grey 40 dell logo grey 40 hp logo grey 40 ibm grey40 netapp grey40 linux grey40 aws grey40 windows grey40 vmware grey40 citrix grey40 exchange grey40 apache grey40 oracle grey40