Custom alerts and data visualizations let you quickly identify and prevent port congestion, security vulnerabilities, and other network performance issues.
Emails 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.
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.
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.
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.
Diagnose network issues by continuously tracking ports across your network. Show port status, data transfer speed, and other key metrics in real time. Visualize monitoring data in clear graphs and dashboards to identify problems more easily. Gain the overview you need to troubleshoot speed issues, security vulnerabilities, and other network performance problems.
Live traffic data graph in PRTG
Device tree view of the complete monitoring setup
Custom PRTG dashboard for keeping an eye on the entire IT infrastructure
Live traffic data graph in PRTG
Device tree view of the complete monitoring setup
“All-around winning
network monitor”
“The real beauty of PRTG is the endless possibilities it offers”
“PRTG Network Monitor
is very hard to beat”
PRTG comes with more than 250 native sensor types for monitoring your entire on-premises, cloud, and hybrid cloud environment out of the box. Check out some examples below!
The SNMP Traffic v2 sensor monitors bandwidth and traffic on a device. It can show the following:
The Port v2 sensor monitors a network service by connecting to one or more of its TCP/IP ports. It can show the following:
The Port Range sensor monitors a network service by connecting to various TCP/IP ports. It tries to connect to the specified TCP/IP port numbers of a device in succession and waits for the device to accept each request. It can show the following:
The Sensor Factory sensor monitors entire business processes that involve several components. You can create a customized sensor with channels based on data from other sensors. It can show the following:
See the PRTG Manual for a list of all available sensor types.
Custom alerts and data visualizations let you quickly identify and prevent port congestion, security vulnerabilities, and other network performance issues.
Set up PRTG in minutes and use it on almost any mobile device.
“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.”
Partnering with innovative IT 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.
Integrating monitoring results from PRTG into NetBrain maps makes the foundation for network automation.
Siemon and Paessler bring together intelligent building technology and advanced monitoring and make your vision of intelligent buildings and data centers become reality.
Real-time notifications mean faster troubleshooting so that you can act before more serious issues occur.
Network Monitoring Software – Version 25.2.106.1114 (May 05th, 2025)
Download for Windows and cloud-based version PRTG Hosted Monitor available
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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.
The SNMP protocol (Simple Network Management Protocol) is a standard protocol used to manage and monitor network devices such as routers, switches, servers, printers, and other hardware connected to a network. SNMP allows network administrators to remotely monitor device performance, collect and analyze data, and even modify configurations on these devices to ensure the network runs smoothly and efficiently.
Key components of SNMP include:
SNMP allows for several key operations:
Versions of SNMP:
There are three major versions of SNMP, each offering different levels of security and functionality.
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 port numbers that are open when they should be closed.
PRTG SNMP port analyzer continuously collects information about the ports on your network polling SNMP metrics. 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.
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:
2. Identify OIDs for port monitoring:
3. Set up PRTG as your SNMP port analyzer:
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.
Paessler 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.
Paessler PRTG is used by companies of all sizes. Sysadmins love PRTG because it makes their job a whole lot easier.
Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.
Everyone has different monitoring needs. That’s why we let you try PRTG for free.
