This article applies as of PRTG 26 The new PRTG UI and API v2 With PRTG 21.4.73 we introduced the first version of the new UI and API v2. The goal is to release a state-of-the-art web interface and RESTful API. In this article, you can find th...

This article applies as of PRTG 25 Beta sensors in PRTG Beta sensors are a part of the experimental features in PRTG. You can enable beta sensors to test the most recent developments from our sensors team. Important notice: The operating m...

This article applies as of PRTG 25 Paessler User Voice You can use Paessler User Voice to offer feedback, propose new features, or request new sensor types. Is there a PRTG roadmap? Not every good idea will end up on our roadmap and our pla...

I want to install the multi-platform probe, but I don't know which version I need to install in order for it to work with my PRTG version. This article applies as of PRTG 26 Multi-platform probe compatibility The multi-platform probe vers...

After updating to PRTG 25.1.104, the PRTG core server does not start anymore, and the log contains the following message: Signature of \Program Files(x86)\PRTG Network Monitor\32 bit\PRTG Server.exe is not valid What can I do to resolve the iss...

After updating to PRTG 25.4.114, the PRTG core server does not start anymore, and the log contains the following message: Signature of \Program Files(x86)\PRTG Network Monitor\32 bit\PRTG Server.exe is not valid. What can I do to resolve the issu...

This article applies as of PRTG 25 Introduction to the PRTG API interface Users can customize and extend the functionality of PRTG Network Monitor using the following options: HTTP API: Access monitoring data and manipulate monitoring o...

After updating to PRTG 26.1.118, the PRTG core server does not start anymore, and the log contains the following message: Signature of \Program Files(x86)\PRTG Network Monitor\64 bit\PRTG Server.exe is not valid What can I do to resolve the iss...

Change triggers work together with change notifications in PRTG to alert you when a sensor detects a change in the value or state it monitors. This article explains what change triggers and change notifications are, when to use them, and how to s...

Looking for an alternative to a deprecated sensor? See the Knowledge Base: What sensors are deprecated and what are their successors or alternatives? Frequently asked questions What does “deprecation” mean? Deprecation is the step in the ...

This article applies as of PRTG 25.1.118 Available sensors in PRTG vs sensor usage outside of plan In the new PRTG web interface, you can find the following card on the home page that contains information about your license usage: This...

This article applies as of PRTG 26 Moving a remote probe It is possible to move a remote probe to a new system, although it does not necessarily make sense to unless you want to preserve historic data or there is a sensor that you must keep...

This article applies as of PRTG 26 Automatic license activation in proxied environments after a PRTG core server restart If you have a Paessler PRTG Enterprise Monitor license and use a proxy server, you might encounter issues with the automat...

This article applies as of PRTG 26.1.118 and multi-platform probe 3.8 Multi-platform probe for PRTG With PRTG 21.4.73, we introduced the multi-platform probe for Paessler PRTG (hereafter referred to as the multi-platform probe) to extend t...

This article applies as of PRTG 26 SMS delivery URLs and ports When configuring SMS delivery in PRTG and selecting an SMS provider from the list of providers, PRTG uses the URLs in the table below. Make sure that outgoing connections are al...

This article applies as of PRTG 26 Missing data in reports Check your PRTG settings as listed below if you encounter the following issues in your historic data reports: You see 0 values, or you see data that is missing completely, or you s...

This article applies as of PRTG 26 Low disk space on probe system The Probe Health sensor monitors the status of a probe system. Among other parameters, this sensor also shows the free disk space on the probe system in the dedicated channel Dat...

This article applies as of PRTG 26 Increasing maximum connections for VMware sensors In the sensor logs, I receive the error messages The request has timed out because the sensor is waiting for mutex. To resolve this issue, change your vCente...

This article applies as of PRTG 26.3.122 and multi-platform probe 3.8 The multi-platform probe for Paessler PRTG The multi-platform probe is now stable! For the multi-platform probe release notes, see the Knowledge Base: What are the release ...

This article applies as of PRTG 26 Correctly displaying geographical maps with background The Geo Maps feature of PRTG allows you to visualize geographical information about your monitored objects (probes, groups, devices). The icons that s...

This article applies as of PRTG 26 FAQ for Push Notifications and the PRTG Cloud How can I set up and use push notifications? Please see the article How can I use push notifications with PRTG? for a step-by-step guide. How do push notificati...

WMI Tools Overview In order to find reasons why WMI isn't working properly on Windows computers Microsoft has published several tools for testing a lot of aspects concerning WMI. For a more PRTG related troubleshooting approach Paessler have ...

PE error codes - overview PE CodeMessageContextPE001 The IPs do not match. (%0:s <> %1:s) DNS IPs PE002 The target host does not respond. PE003 No remote desktop service is connected. To resolve this issue, check if the RDP port is ac...

This article applies as of PRTG 26 Troubleshooting 'Connection could be not established' error messages What the error message means The error message Connection could not be established (code: PE015) means that the RPC server of the t...

This article applies as of PRTG 26 Setting core-probe connection ports of PRTG As of PRTG 15.2.17.2896, you cannot change the connection port for remote probes in the PRTG web interface or in the PRTG Administration Tool anymore. By default, ...

This article applies to PRTG Network Monitor 26 Reasons for Probe Restarts There can be several reasons for probe restarts. Restarts can be caused by errors or they can be planned. This article provides an overview about reasons for probe r...

This article applies as of PRTG 26 Solving Active Directory login issue If you cannot login to PRTG with Active Directory users and encounter the error message  Your login has failed. Please try again! try the following: Provide explicit cred...

This article applies as of PRTG 26 Monitoring Cisco Webex with PRTG With PRTG, you can monitor Cisco Webex out of the box with the EXE/Script Advanced sensor. You can use this sensor to monitor the status of Webex meetings and Webex calling, ...

This article applies as of PRTG 22 Data retention and historic data purging PRTG stores everything from monitoring configurations, data, and logs to tickets and reports in the PRTG data directory on the probe system. Data is also found in the ...