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. Read more

SNMP port analyzer with PRTG

Q: 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. Read more

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

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Product overview

Our users give top ratings for monitoring with Paessler PRTG

PRTG SNMP port analyzer: What you’ll find on this page

Are you expecting too much from your ports?
Keep data flowing safely at speed with your SNMP port analyzer PRTG
What SNMP port analysis looks like in PRTG
Comprehensive port analysis on autopilot
Analyze ports: FAQ

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.

Free Download
Product overview

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.

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

“All-around winning
network monitor”

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

“PRTG 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.

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Product overview

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.

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

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.

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Product overview

“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.

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 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.

Free Download
Product overview

Create innovative solutions with Paessler’s partners

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

Martello

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.

NetBrain

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

Siemon

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

Analyze ports: FAQ

What is a port?

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?

How does PRTG SNMP port analyzer work?

How can I monitor ports using SNMP?

What is a sensor in PRTG?

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.

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?

love

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.

speed

Monitor your entire IT infrastructure

Bandwidth, servers, virtual environments, websites, VoIP services – PRTG keeps an eye on your entire network.

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Try Paessler PRTG
for free

Everyone has different monitoring needs. That’s why we let you try PRTG for free.

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

Free Download
Product overview

PRTG	Network Monitoring Software - Version 25.1.102.1373 (January 9th, 2025)
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 More