Paessler PRTG

All-in-one server monitoring & network monitoring software


  • Monitor all types of servers plus your entire IT infrastructure
  • Custom real-time alerts notify you before issues occur
  • Eliminate problems with server performance & bottlenecks
  • Reduce costs by improving stability & reducing server downtime

Monitor all your servers & hosts: Mail servers, web servers, database servers, file servers, virtual servers & more


Our users give top ratings for monitoring with Paessler PRTG




PRTG makes server monitoring easy

Custom alerts and data visualization make it easy to monitor, identify, and prevent server performance issues.


3 reasons to choose PRTG server monitoring


Integrated monitoring solution

Paessler PRTG monitors your entire infrastructure & servers, including processors, memory, CPU usage, cooling fans, power supplies, and more.

  • Adapts dynamically to the size of your server landscape
  • Quickly recognizes if a router or switch fails & causes a disruption
  • Virtual servers are automatically discovered & monitored

Custom alerts via email, SMS and more

PRTG alerts ensure that system failures are only short-lived or even prevented.

  • Email, SMS, push notifications, and more alert you faster if complications arise
  • Locate errors directly to save time
  • Customize alert threshold values to be notified before an issue leads to a crash

Better future capacity planning

PRTG simplifies capacity planning to save you time and money.

  • Recognize the need to increase capacity sooner
  • Detailed reports for scheduling and process optimization
  • Dashboards & maps help win over the management

Professional unified server monitoring software

Server types monitored by PRTG

PRTG monitors all types of servers – even in distributed networks. Here are a few examples of the kinds of servers for which PRTG provides predefined sensors so that you can start monitoring servers immediately.

How PRTG defines sensors (FAQ)


Mail server monitoring

Mail servers pose sensitive issues. When mail server glitches occur, employees are quick to complain, putting the support department under intense strain. With PRTG, you can monitor your mail servers round the clock and be alerted in a timely fashion. IMAP, POP3, SMTP, and more: we supply more than a dozen sensors for your mail server monitoring.

Sensors for mail server monitoring

Web server monitoring

Website performance can determine the fate of many companies. Downtime is costly from the very first moment. That’s why PRTG also makes a whole range of sensors available for your web server monitoring (IIS, Apache, and more).

Sensors for web server monitoring

Database server monitoring

Most departments live & die by database performance. PRTG offers a variety of sensors for immediate use for the monitoring of MySQL, Microsoft SQL, or Oracle SQL. Choose HTTP content or perform database queries for your SQL server monitoring.

Sensors for database server monitoring

File server monitoring

Administrators must ensure that the file server runs smoothly, so it’s common for them to search for a specific FTP server monitoring tool. But PRTG has you covered with around 20 preconfigured sensors for file server monitoring, including NAS devices and storage area networks (SAN)

Sensors for file server monitoring

Virtual server monitoring

In many companies, virtual servers are already a part of the IT structure. And for good reason: memory, hard disk space, and computing power can be allocated to individual applications dynamically. Resources are thus used in a considerably more efficient manner. PRTG monitors your virtual servers, right down to the very last detail.

Sensors for virtual server monitoring

Cloud server monitoring

Cloud server monitoring ensures that your cloud-based services, including SaaS applications, maintain optimal performance and uptime. With PRTG, you can monitor the uptime and performance of your cloud servers in real-time. Graphs and statistics visualize server metrics and identify potential issues before they affect your users.

More cloud sensors

Unlimited server monitoring

With PRTG, you get several other predefined sensors which provide an overview of your entire server landscape. Create custom sensors whenever you want, and use the API to adapt PRTG to any special use case.

More server sensors


Start server monitoring with PRTG and see how it can make your network more reliable and your job easier.


What server monitoring looks like in PRTG


Diagnose network issues by continuously monitoring all your servers and hosts. Show server health and status in real time and visualize data in graphical maps & dashboards to more easily identify problems. Gain the visibility you need to troubleshoot server issues and prevent problems.



Free server monitoring vs. licensed editions




Server monitoring freeware


  • 100 sensors free for life (enough for basic server monitoring)
  • For each device about 10 sensors required on average
  • Alarm, mapping, and report features included
  • Freeware edition sufficient for most small networks

Our licenses

PRTG licenses


  • Flexible licenses with 500 to 10,000 sensors
  • Monitor 50 to 1,000 devices or more
  • Easily upgrade if more sensors are required
  • Existing monitoring unchanged with upgrade
  • Try full version free for 30 days


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


“All-around winning
network monitor”

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


“PRTG Network Monitor
is very hard to beat”


PRTG makes server monitoring easy

Custom alerts and data visualization make it easy to monitor, identify, and prevent server issues.


PRTG is compatible with all major vendors & manufacturers


vendors applications blue


Virtual server monitoring with PRTG

virtual server monitoring

Complete overview

Virtualized servers are complex. Malfunctions at the hardware level also affect virtual machines. PRTG gives you a complete overview at all times as a monitoring solution for your entire virtual environment.

Create a foundation that enables your efficient data structures to run as smoothly as possible – and watch as the improved utilization pays off.


Custom fit

PRTG is one of the server monitor tools that can monitor almost any virtual infrastructure including Microsoft Hyper-V, Citrix XenServer, Nutanix, VMware, and more.

As a VMware technology partner, our server monitoring tool offers predefined PRTG VMware sensors for different purposes as well as sensors for many other vendors.



PRTG is fast and easy to upgrade and adapts to your growth dynamically. New sensors can be easily applied in minutes, reducing your time and effort in managing your server monitoring solution. This is particularly important since virtual servers are often introduced when a company is in the midst of vigorous growth. 


Host monitoring for virtual servers


In virtual environments in particular, it's vital to monitor all your hosts. Host monitoring with PRTG allows you to constantly keep track of the availability and performance of your host (CPU, memory usage, and other performance metrics). Especially if multiple VMs are running on one host, it's absolutely crucial to ensure a proper allocation of resources.

Host monitoring can also be important for web servers.

Whether you want to monitor physical or virtual servers, with PRTG you always keep an eye on the proper functioning of your hosts.


Your server monitoring 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



The benefits of PRTG server monitoring


Get real-time updates

Server monitoring lets you monitor your servers in real time with regard to availability, accessibility, capacity, and overall reliability.

  • Status constantly updated
  • Check server status any time

Improve stability

Sysadmins monitor their servers because they wish to improve the network performance and stability.

  • Set custom thresholds
  • Get real-time alerts
  • Complete your everyday tasks
  • Have a constant overview of resources

Analyze & optimize

Sysadmins analyze the values they receive from their monitoring software to develop courses of action.

  • Data-based optimization
  • Capacity planning
  • Custom PRTG reports

Try our Multi Server Simulator

Now you can test the behavior of your network before setting up a collection of new servers. It's easy with our Multi Server Simulator. See how your network reacts – and which areas need some work.

Try the Multi Server Simulator


PRTG makes server monitoring easy

Custom alerts and data visualization make it easy to monitor, identify, and prevent server issues.


Predefined sensors for server products

PRTG includes predefined sensors for server computers of different vendors.


 Vendor PRTG sensors for server monitoring
  • HPE 3PAR sensors
  • SNMP HPE BladeSystem sensors
  • SNMP HPE ProLiant sensors
  • Dell EMC Unity sensors
  • Dell PowerVault sensors
  • SNMP Dell EqualLogic sensors
  • SNMP Dell PowerEdge sensors
  • SNMP Cisco UCS sensors
  • SNMP IBM System X sensors



HPE Enterprise Partner

HPE Partner Ready for Technology Partner Program

Thanks to our multi-purpose monitoring tool and the comprehensive support we offer for HPE products, we have been asked to participate in the Hewlett Packard Enterprises Partner Ready for Technology Partner Program.

This technology partnership with Hewlett Packard Enterprises helps us to effectively develop new solutions, and proves that PRTG integrates well with software created by HPE.


LDAP monitoring with PRTG


LDAP at a glance


Lightweight Directory Access Protocol (LDAP) is a protocol that queries information from ditributed directory services. Directories contain object-related data which monitoring tools like PRTG that support LDAP monitoring can read. One such directory is Active Directory, the Microsoft service created for use in a Windows Server environment.

Getting started with LDAP monitoring


PRTG comes with a preconfigured LDAP sensor out of the box. This sensor connects to the LDAP server using distinguished name (DN) authentication, and displays the response time of your LDAP server if both connection attempt and authentication are successful.


arne seifert

„Hey Arne, how do I avoid false alarms during server maintenance?“

“In practice, repairs in the short-term will be necessary. While working, your monitoring will not trigger false alarms. The one-time maintenance window allows you to pause monitoring for each individual device or device group. For regular maintenance, with PRTG you can easily create an automated schedule.”

Arne Seifert, technical support at Paessler


HTTP server error messages


Common server errors


All status codes that begin with “5” (5XX) are server errors – and therefore a problem. Server error 500 is a collective status code for unexpected server errors. All other server errors (501, 502, 503, etc.) are used to flag specific problems.

Error 503, for example, means that the website’s web server is currently overloaded or unavailable. For more information, see our Knowledge Base articles about HTTP status codes and HTTP response codes.

Web server monitoring


Error messages are clear evidence that web server monitoring makes sense. All the more so if the website is an important tool for the company. PRTG comes with a full range of HTTP sensors for monitoring websites as well as individual URLs.


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“We can all work with greater peace of mind knowing
that our systems are constantly being monitored.”

Markus Puke, Network Administrator, Schüchtermann Klinik, Germany


Start server monitoring with PRTG and see how it can make your network more reliable and your job easier.



Create innovative solutions with Paessler’s partners

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


With ScriptRunner, Paessler integrates a powerful event automation platform into PRTG Network Monitor.

Read more


UVexplorer integrates tightly with PRTG to bring fast and accurate network discovery, detailed device inventory, and automatic network mapping to the PRTG platform.

Read more
















Video: Why PRTG server monitoring is important


We'll make you a monitoring expert

Gain practical knowledge on how to monitor your infrastructure with Paessler PRTG. Our training sessions are planned and provided by Paessler system engineers and are suitable for different experience levels.


Book a spot


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.



Easy setup, try PRTG for free today

Custom alerts and data visualization make it easy to monitor, identify, and prevent server issues.


Learn about Redfish sensors


From PRTG 21.3.70 on, we released our first Redfish sensors.

With Redfish sensors, you can monitor server hardware in the datacenter using the Redfish protocol from the servers' management controllers like Lenovo XClarity, HPE iLO, or Dell iDrac. Redfish is the successor of IPMI and provides better security.

Redfish System Health sensor

This sensor monitors the overall system status and the status of various components such as power supplies or PCIe devices, if available.

Redfish Virtual Disk sensor

This sensor monitors the virtual disk of a Redfish Scalable Platforms Management API (Redfish)-capable server.

Redfish Power Supply sensor

This sensor monitors the power supply of a Redfish Scalable Platforms Management API (Redfish)-capable server.


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 server monitoring with PRTG and see how it can make your network more reliable and your job easier. 




Network Monitoring Software - Version (June 26th, 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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