SNMP port analyzer with PRTG
Analyze your ports and maximize network security & performance
- 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 SNMP port analyzer: What you’ll find on this page
PRTG makes SNMP port analysis as easy as it gets
Custom alerts and data visualizations let you quickly identify and prevent port congestion, security vulnerabilities, and other network performance issues.
Are you expecting too much from your ports?
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.
Keep data flowing safely at speed with your SNMP port analyzer
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.
“All-around winning “The real beauty of PRTG is the endless possibilities it offers” “PRTG Network MonitorIT experts agree: Paessler PRTG is a great solution for IT infrastructure monitoring
network monitor”
is very hard to beat”
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 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.
Device tree view of the entire monitoring setup
Port v2 sensor in PRTG
Custom PRTG dashboard for keeping an eye on the entire IT infrastructure
Your SNMP port analyzer at a glance – even on the go
Set up PRTG in minutes and use it on almost any mobile device.
Find the root cause of the problem with our PRTG SNMP port analyzer solution
Real-time notifications mean faster troubleshooting so that you can act before more serious issues occur.
“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
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:
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.
PRTG makes SNMP port analysis as easy as it gets
Custom alerts and data visualizations let you quickly 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.
Analyze ports: FAQ
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.
What is SNMP?
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:
- Managed devices: These are the network devices that are monitored or managed using SNMP, such as routers, switches, servers, and printers. Each device must run SNMP-compatible software (called an agent) to communicate with the management system.
- SNMP agents: The SNMP agent is software running on the managed device that collects and stores data about the device's performance and status (e.g., CPU usage, memory, network traffic). It responds to requests from the SNMP manager and can send notifications (called "traps") when certain events occur.
- SNMP manager: Also known as the Network Management System (NMS), this is software (or sometimes hardware) that communicates with SNMP agents to gather and analyze information about managed devices. The SNMP manager can request data, receive notifications (traps), and sometimes send commands to modify the behavior or configuration of a device.
SNMP allows for several key operations:
- Get request: The SNMP manager can request specific information from an agent, such as the CPU usage of a router.
- Set request: The SNMP manager can change certain configuration settings on the managed device, such as modifying a network setting.
- GetNext request: This is used to retrieve the next object in the MIB, often for iterating through a list of items (e.g., interface statistics).
- SNMP trap: The SNMP agent can send unsolicited messages (traps) to the manager when predefined conditions occur, such as a device failure, threshold breaches, or other significant events.
Versions of SNMP:
There are three major versions of SNMP, each offering different levels of security and functionality.
- SNMPv1: The original version, with basic functionality but minimal security. It only uses plain-text community strings for authentication.
- SNMPv2c: An improved version that offers better performance and more efficient data retrieval. However, it still lacks strong security features.
- SNMPv3: The latest version, which provides enhanced security features like encryption and secure authentication, making it suitable for use in more sensitive environments.
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 port numbers that are open when they should be closed.
How does PRTG SNMP port analyzer work?
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.
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:
- 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 Management Information Base). The main OID for interface statistics is ifTable (1.3.6.1.2.1.2.2).
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.
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 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.
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
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.Still not convinced?
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Start conducting SNMP port analysis with PRTG and see how it can make your network more reliable and your job easier.
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PRTG |
Network Monitoring Software - Version 25.1.104.1961 (April 7th, 2025) |
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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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