IIS monitoring tool PRTG

  • PRTG monitors every aspect of your IIS servers
  • PRTG secures your web page performance
  • IIS Monitoring in PRTG comes out of the box


Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

IIS Monitoring:
Why it is important

For many companies their existence depends directly on a high-performing and an always available website, which sometimes is the business model itself, sometimes it’s responsible for creating sales in the form of a shop. Often it’s the most important tool for new customer acquisition and customer care. Even if the Internet appearance doesn’t have a vital significance, no company can afford long response times or failures of its Internet presence without risking serious losses.

The solution is simple: Monitoring the Microsoft IIS (Internet Information Services for Windows Server) detects malfunctions and warns the responsible person so you can eliminate the problem in time.

Your IIS Performance at a glance
– even on the Go

PRTG can be started within minutes and it's compatible with many mobile devices.


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, and more, in one view!


Out of the Box IIS Monitoring

PRTG Network Monitor offers monitoring of the Microsoft Internet Information Services server right out of the box. The PRTG Windows IIS Application Sensor keeps an eye on all important parameters, such as:

  • Sent and received bytes per second
  • Number of sent and received files per second
  • Number of anonymous and known users per second
  • Number of Common Gateway Interface (CGI) requests per second
  • Number of GET and POST requests per second
  • Number of not found errors per second

 “The greatest advantage of PRTG? You get to rest easy“

Steffen Ille, Bauhaus-University of Weimar.

This is what IIS monitoring looks like in PRTG


PRTG alerts you before problems occur

In the case of "classic" web page monitoring, the administrator is first confronted with the effect and then has to find and solve the cause of the problem. The actual relationship between cause and effect is reversed; first the effect is received and then a cause is sought:

  1. Alarm: "The website is not reachable or reacts too slowly!"
  2. Research: "What are the causes of the failure and how can I eliminate it?"

But what if the cause is not so easy to find and therefore the problem cannot be solved quickly? Or can the sequence be reversed, with the cause known before the effect? For example, identify impending causes of problems in time and to proactively avoid the consequences?

Your way to IIS Monitoring






IIS Monitoring at a glance

Save your effort, time
and money with our
All-In-One Solution PRTG




i Ping is a command-line utility, available on virtually any operating system with network connectivity, that acts as a test to see if a networked device is reachable. The ping command sends a request over the network to a specific device. A successful ping results in a response from the computer that was pinged back to the originating computer.
Read more

Let's go through the entire IIS Monitoring Setup process step by step and define a few basic parameters.

The Website is Online

The Website is Online

Let us skip the simplest website monitoring from the beginnings of the Internet, where a ping to the website measures its response time (which is still important!). The pure reaction time of a website does not necessarily mean something about the user experience: After the first ping, the loading of the actual page can still be felt forever. PRTG monitors far more, such as the loading time of the source code or even the complete website including all content. Scripts are used to simulate logon processes or purchase processes and to measure response times. Other scripts can read and check individual values from a web page. For this purpose, PRTG also supports the monitoring of the various web servers like Apache, IIS and more.

If the company operates internationally, there is another, additional challenge: if the web server is operated in the USA and is accessible without delay from the USA, this does not mean that customers from Europe or Asia also have fast access. In this case, the monitoring solution must allow monitoring of the web page from globally distributed locations. This only gives the administrator the information that something is wrong. What is not working properly is the next question he has to answer.

Application performance monitoring

Application performance monitoring

Special tools for monitoring web applications, so-called application performance monitoring or APM tools, go a step further and analyze the source code of the web application. In addition to ongoing monitoring, this is mainly the cause of research on causes. However, this is only about the causes within the application, which primarily concerns Dev-Ops and are mainly relevant for the development of the website. The administrator, who is responsible for the day-to-day operation of the website, needs other tools like PRTG for his research to be successful.

Beyond the web application

Beyond the web application

Web servers and databases provide code and data, load balancers control data streams, firewalls form security locks, and switches and routers distribute data that often travels over many stations from one location to another. This is a complex thing whose response time depends on far more than only source code. This includes physical computing units with components such as CPU or memory, or virtualized environments (VMware or Hyper-V), which in turn depend on the underlying hardware. Many applications, such as web servers like IIS and databases, also have a great impact on the performance of a website. PRTG monitors everything at a glance.

Avoid problems in the beginning

Avoid problems in the beginning

If the website responds slowly, each individual component can be the cause. The search for the error is complex and time consuming.

The best way is to avoid errors before they occur.

The recipe for this is IT monitoring or unified monitoring as an extension of network monitoring. If you constantly monitor all components involved in the publication process of a website with PRTG, you can identify and anticipate impending problems in advance: in the ideal case before any kind of impairment of the online appearance occurs. In the long term, systems and processes can be optimized based on historical monitoring data, thus improving the reliability and overall performance of the website on a sustained basis.

Trusted by 300,000 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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  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime

PRTG simplifies your day

Our monitoring software works for you and promptly notifies you of potential issues.
It frees you to concentrate on your day-to-day tasks with peace of mind.


PRTG saves time

With PRTG, you get one central monitoring tool for your servers and entire network. Enjoy a quick overview of your whole infrastructure via our dashboard and app.

PRTG saves worry

Customizing PRTG is a breeze. Getting started or switching from another network monitoring tool is easy thanks to the PRTG auto-discovery and pre-configured device templates.

PRTG saves money

80% of our customers report substantial or even exceptional cost savings in the area of network monitoring. The experience shows that the costs for licenses have paid for themselves within a matter of weeks.


Why you should rely on PRTG for IIS Monitoring

iWhat is a sensor?

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.)


For the correct choice of the monitoring solution it is necessary to consider a whole series of aspects. First of all, the software must include all functions for direct monitoring of the website, and features for monitoring the entire infrastructure involved in the publishing process. Very important are also general functions, which stand for flexibility and usability and form an essential basis for the successful use. And last but not least, price and licensing play an essential role in decision-making.

PRTG combines all advantages and aspects of a professional IIS Monitoring tool - Out of the box:


  • Website monitoring via ping
  • Monitoring the loading time for the complete page
  • Transaction monitoring
  • Web server monitoring (Microsoft Internet Information Services IIS, Apache)
  • Email monitoring
  • Monitoring the website of globally distributed sites
  • Monitoring Windows Performance Counters and locate network bottlenecks
  • Individual dashboards and great visualizations of all important performance metrics
  • Preconfigured sensors like PerfCounter IIS Application Pool Sensor or Windows IIS 6.0 SMTP Received Sensor
For efficient network monitoring, the following requirements must be met:


  • Documented API and templates for the simple creation of own queries, if possible also for the web application itself
  • Comprehensive notification and alerting functions
  • Simple and versatile publication process for monitoring data
  • Storage of the monitoring data in the original interval for precise long-term evaluations

Important aspects

  • Ease of use
  • Simple and transparent licensing
  • Free trial and great Price-performance ratio

PRTG: The swiss army knife for sys admins

Adapt PRTG individually and dynamically to your needs relying on a strong API:

  • HTTP API: Access monitoring data and manipulate monitoring objects using HTTP requests
  • Custom Sensors: Create your own sensors for customized monitoring
  • Custom Notifications: Create your own notifications to send alarms to external systems
  • New REST API Sensor: Monitor almost everything that provides XML or JSON

German quality

Free Download
  • Unlimited version of PRTG for 30 days
  • After 30 days, PRTG reverts to a free version
  • Or, you can upgrade to a paid license anytime


Made in Germany: The PRTG Network Monitoring Tool is the fruit of a dedicated, international team. The company was founded by Dirk Paessler. The Paessler AG headquarters are located in the city of Nuremberg, in the heart of Germany.

A quick overview: PRTG provides a quick overview, whether on your desktop or as an app on your smartphone. An individually configurable dashboard features every key stat in the form of an easy-to-understand graph, so you can always make sure your network is running smoothly.

Easy configuration: Our Smart Setup guarantees a quick and easy setup. During configuration, PRTG will ping your network and create appropriate sensors, saving you a great deal of time. Furthermore, switching from other software such as Nagios is relatively quick and easy.

Outstanding support: Our support team strives to resolve inquiries within 24 hours (on business days). Discover a wide selection of videos, webinars, and instructions in our knowledge base. Our manual is also an excellent resource.

Getting started is easy: The trial version is for free, allowing you to evaluate our monitoring tool with no strings attached. To upgrade, simply search for a suitable license. You can modify your license any time you like. 


Network Monitoring Software - Version (October 20th, 2020)


Download for Windows and hosted version 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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