Paessler PRTG

PRTG firewall monitoring ensures
the security of your network


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    Monitor incoming and outgoing traffic
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    Stay informed on the status of your firewalls
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    Automatic alerts in the event of malfunctions
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    Compatible with countless manufacturers
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    Native sensors for Cisco and other devices



What is firewall monitoring?

The stability of the network firewall is responsible for the protection of both the processes which are running as well as sensitive data. It is of the greatest importance to corporate security that the firewall be stable. IT service interruptions can paralyze the company, while the theft of company figures, future plans, and customer data can have unforeseeable consequences. It is all the more vital, therefore, that the firewall remains uninterrupted and always up to date.

With PRTG Firewall monitoring, you get a series of sensors which makes monitoring your firewall straightforward and effortless. Enjoy a clear overview of inbound and outbound network traffic, and be informed immediately in the event of a crash. This will enable you to promptly take action to restore the security of your system.

In addition, PRTG constantly monitors for firewall updates - for outdated firewall software is synonymous with a threat to security. 

Thanks to PRTG, the entire staff can work with peace of mind.


 i How PRTG defines sensors

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.

View video (3:26 min.)


The advantages of firewall monitoring with PRTG

A more secure business IT

A more secure business IT

All IT-based work processes are vulnerable to attacks to the IT infrastructure. With firewall monitoring, you can guarantee your firewall is always enabled and thus ward off attacks from the outside.

Data protection taken seriously

Data protection taken seriously

Your business partners and customers trust that with you, their data is in good hands. Firewall monitoring is an important step to safeguarding this data.

Automatic alarm

Automatic alarm

You don't need to stay glued to the screen: you'll be notified if the firewall is down or network security is in any way compromised.


What firewall monitoring with PRTG looks like


What data does PRTG gather?


  • Traffic of inbound and outbound connections (LAN and WiFi)
  • Firewall status
  • Most used connections (only NetFlow)
  • Most active senders (only NetFlow)
  • Most used protocols (only NetFlow)

PRTG makes your job easier

Our monitoring software frees you to focus on other tasks by promptly notifying you of potential issues.


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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.

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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.

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Save money

80% of our customers report substantial cost savings with network monitoring. Your costs of licenses will likely pay for themselves within weeks.












How Firewall monitoring with PRTG works

PRTG Firewall Monitoring works jointly with most routers and firewalls. Cisco, Draytek, Fortinet and Bintec systems are supported. Also LANCOM and Windows Servers, as well as all other SNMP-compatible devices. SNMP is used most of the time, but for Cisco ASA firewalls, NetFlow technology is employed.

NetFlow offers a much more detailed analysis of bandwidth traffic than SNMP. While both SNMP and NetFlow show how much traffic the firewall filters, NetFlow can also indicate the most used connections and protocols and most active senders.

PRTG Firewall Monitoring can be configured in a matter of minutes, after which time the safeguarding of your network will be up and running. In the event the firewall is down or unusual activity is detected, PRTG will immediately send you an alert by email, SMS, or push notification.

 i NetFlow is a protocol for collecting, aggregating and recording traffic flow data in a network. NetFlow data provide a more granular view of how bandwidth and network traffic are being used than other monitoring solutions, such as SNMP. NetFlow was developed by Cisco and is embedded in Cisco’s IOS software on the company’s routers and switches and has been supported on almost all Cisco devices since the 11.1 train of Cisco IOS Software.
Read more



PRTG firewall monitoring software: Preconfigured sensors for the biggest manufacturers

PRTG comes with more than 250 native sensors, including sensors for countless router, switch, and server manufacturers.
This makes our monitoring software quick and easy to set up – not to mention ideal for protecting your company from external threats.
See our overview of PRTG sensors and firewall manufacturers.

Cisco firewall monitoring

PRTG comes with sensors for monitoring a variety of Cisco devices. In fact, several of its native sensors are designed especially for Cisco. These include SNMP sensors for Cisco firewall monitoring and CBQoS (Class Based Quality of Service) monitoring. You can also use NetFlow sensors to monitor the traffic that runs through Cisco firewalls. More on Cisco Monitoring.

SNMP Juniper NS System Health

Juniper firewall monitoring

Many system administrators use Juniper products and devices for their company networks. PRTG comes with an SNMP sensor for Juniper that monitors the various hardware parameters of Juniper firewalls. You can also use jFlow sensors to monitor the traffic that runs through Juniper firewalls. More on jFlow Monitoring.

SNMP SonicWall System Health

SonicWall Firewall Monitoring

SonicWall is a leading provider of network firewalls. PRTG comes with a native sensor that lets you monitor SonicWall firewalls directly from your monitoring dashboard. To do so, simply enable SNMP in your SonicWall product.












PRTG supports many firewall vendors & products

Most firewalls can easily be monitored via SNMP. For some products we offer a predefined sensor. Here you see a selection of the supported firewalls:


Firewall Available Predefined Sensors Link to Manual/Tutorial

NO (via Device Template)

NO (External User Tutorial)

Device Template on GitLab

MikroTik Traffic Flow Monitoring with PRTG from MUM Mikrotik (PDF)


YES (Native PRTG Sensor)

NO (via NetFlow v9)

SNMP SonicWall System Health Sensor

SNMP SonicWall VPN Traffic Sensor

NetFlow v9 Sensor


Sophos UTM

NO  (via Device Template)

NO (via NetFlow v9)

Device Template for Sophos

NetFlow v9 Sensor

Palo Alto Networks


NO (via Device Template)

NO (via NetFlow v9)

Knowledge Base article with Tutorial

Device Template on GitLab

NetFlow v9 Sensor

Cisco Asa


YES  (Native PRTG Sensor)

SNMP Cisco ASA VPN Traffic Sensor

SNMP Cisco ASA VPN Connections Sensor

SNMP Cisco ASA VPN Users Sensor


NO (via SNMP)

NO (via NetFlow v9)

Blog article with Tutorial

NetFlow v9 Sensor


NO (via SNMP)

NO (via NetFlow v9)

SNMP Traffic Sensor

NetFlow v9 Sensor (Softflowd must be enabled on pfsense)


NO (via SNMP)

NO (via Device Template)

Knowledge Base Article PRTG SNMP CustomSensor

Device Template on GitLab

WatchGuard Firebox

NO  (via SNMP Custom Sensor)

NO (via NetFlow Sensor)

Blog article with Tutorial

WatchGuard NetFlow PRTG Integration Guide

Draytek NO (via SNMP Custom Sensor)

 With device OID and PRTG SNMP Custom Sensor


YES (Native PRTG Sensor)

NO  (via Device Template)

SNMP Juniper NS System Health Sensor (older)

Template on GitLab


NO (via SNMP Custom Sensor)

 With device OID and PRTG SNMP Custom Sensor

NO (via SNMP Custom Sensor)

 With device OID and PRTG SNMP Custom Sensor



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.”

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“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.”

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“The tool excels at its primary focus of being a unified infrastructure management and network monitoring service.”

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More than just firewall monitoring: Monitor and analyze traffic in real time

Traffic monitoring

Need an overview of your traffic? PRTG monitors network traffic in detail. This includes web traffic, email traffic, and file transfer traffic, as well as IP addresses, protocols, and connections. With our software, you can spot data traffic problems in real time and take action at once – before your coworkers realize something is wrong. More on Traffic Monitoring.

Log file monitoring

Sysadmins also need to keep an eye on their log files. But analyzing these files in detail can be a real hassle. PRTG helps you get a head start. You’ll automatically receive an alert if log file entries spike or certain text strings appears in a log file. Among other things, our software monitors the log files of Windows systems and applications. More on Log Monitoring.


Case studies: Companies that monitor their network and firewalls with PRTG 

"Primarily we're monitoring Windows and BSD servers, although we also monitor switches, routers, firewalls, edge appliances and other networking hardware."

Jonathan Hoppe, Co-Founder, Total Uptime Technologies.

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“As well as all of the basic admin tasks, I’m really interested in utilizing PRTG as widely as possible across the business to realize its full potential. Extending it to our CCTV cameras, and also temperature monitoring in our server room, shows that the product can be effectively applied when it comes to security and environmental monitoring as well.”

David Harris, IT-Manager, PET-XI

Read more

FAQ – Firewall monitoring

What kind of software can I use to monitor my firewall?

In general, you have two possibilities: you can use the monitoring systems of firewall providers, or you can use centralized monitoring software to monitor your firewall as well as your entire network. Nagios, ManageEngine, and PRTG are examples of such software. For more information, see our comparison of PRTG with our competitors.

Is PRTG a firewall analyzer?

PRTG sensors monitor the status of your firewall and hardware parameters such as CPU usage. However, our sensors are not suitable for filtering and storing log files. Some software providers specialize in the analysis of firewalls. PRTG is often used in combination with their tools.



How can I monitor my routers and switches?

When your firewall sounds the alarm, it’s not always easy to identify the source of the problem. PRTG monitors your switches and routers around the clock to check for anomalies. It lets you keep an eye on your entire network.


Tutorial: Allowing PRTG through the firewall

Our monitoring software is often used in decentralized networks. It therefore comes with remote probes that connect to the core PRTG server. To use these probes, you must allow PRTG through your firewall. Learn how to do it here.


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


Notification system:
Be alerted quickly



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PRTG features a variety of alert types: E-mail, SMS, Pager, Apps, running an external application, etc. You can specify when and how each person is to be informed about network issues. To do so, you can add contacts and edit, delete, or pause your notifications at any time.

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The notification system is built into the monitoring software and is available at no extra charge. Because of its integrated quality, configuring the alert feature is done in just a few clicks.

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PRTG won't wait to let you know if your "house is on fire." You define your own thresholds. If these are crossed, you'll receive a corresponding notification. This means you can intervene promptly before clients or coworkers are aware of any problems.


Create innovative solutions with Paessler’s partners

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

IP Fabric

Combining the broad monitoring feature set of PRTG with IP Fabric’s automated network assurance creates a new level of network visibility and reliability.

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With condition monitoring and retrofitting, PRTG and Schildknecht DATAEAGLE make even older production plants competitive.

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“Easy to implement and configure with good technical support.”

R. v. S., ICT Manager at Heinen & Hopman Eng BV



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

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