My Amazon sensors show the error message: You are not authorized to perform this operation.  This article applies as of PRTG 22 Setting permissions for the AWS API key There are several sensors with which you can monitor single Amazon web serv...

This article applies as of PRTG 22 Review monitoring data in the PRTG web interface There are several ways to review your monitoring data in the PRTG web interface: In the Overview tab of monitoring objects Visual representation of ch...

This article applies as of PRTG 22 Is there a possibility of having an easier option like changing queries directly via the PRTG web interface without logging in to that probe system to access the SQL query file? Security feature: ...

This article applies as of PRTG 22 What are beta sensors? How can I enable them? 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 ou...

This article applies as of PRTG 22.2.76 The connection of SSH sensors does not work or new SSH sensors cannot be added. Which encryption algorithms do PRTG SSH sensors support? The default SSH connection mode supports: Cipher • aes128...

This article applies as of PRTG 22 Enabling and using remote commands in Windows PowerShell If a sensor, for example the Hyper-V Cluster Shared Volume Disk Free sensor, uses PowerShell commands, you have to enable Remote PowerShell to mo...

This article applies as of PRTG 22 Finding the Web Services API (WSAPI) Port for Connecting PRTG HPE 3PAR Sensors to HPE 3PAR System Where to find the WSAPI port of the HPE 3PAR system that you want to monitor You must enter the correct...

This article applies as of PRTG 22 PRTG sensor graphs display speed values but not volume values Graphs without volume lines Sensor types that can be referred to as delta sensors do not include volume in their data graphs, neither in...

This article applies as of PRTG 23 Configuring Microsoft 365 Service Status sensors in PRTG: How to set permissions for Office 365 Management APIs Credentials for Microsoft 365 and permissions for Microsoft Graph Before you can se...

This article applies as of PRTG 22 Understanding requirements, usage and troubleshooting of PowerShell sensors PowerShell sensors: FAQ See the following articles about PowerShell sensors and particularly about the Exchange server sensor...

This article applies as of PRTG 25 Unable to connect SSH sensors that are in the Unknown status SSH sensors in Unknown status because of fail2ban While we were trying to set up SSH sensors on an Ubuntu server, we encountered the foll...

This article applies as of PRTG 22 Remote PowerShell sensors gives errors like The WSMan provider host process did not return a proper response. Disabling Remote PowerShell memory limitation in PRTG: Resolving errors and ensuring adequate...

This article applies as of PRTG 22 When trying to add new Exchange sensors to PRTG, I get the message (1) "The Sensor cannot connect to the Device using Remote-PowerShell. Ensure that remote management is enabled on the Exchange Ser...

This article applies as of PRTG 22, as well as partly to PRTG 9 and PRTG 12 Ensuring Continuity in PRTG Port Monitoring: Automating Port Re-Recognition and Remapping After Device Reboots How do the automatic port name and number updates ...

This article applies as of PRTG 22 Why do my Hyper-V sensors show an error message after renaming my virtual machine, network card, or disk resource name? Hyper-V sensors and changing names We recommend that you do not rename virtual...

This article applies as of PRTG 22 How do I increase the number of connections accepted by a VMware host system (vCenter) to avoid connection timeouts when monitoring such systems with the VMware sensors of PRTG? In the sensor logs, I...

This article applies as of PRTG 22 Receiving following HTTP sensor errors depending on the monitored webpage and when SNI is used for SSL handling Application protocol errors: 403 Forbidden, 400 Bad Request SSL/TLS protocol errors:...

This article applies as of PRTG 22 Troubleshooting HP ProLiant server SNMP monitoring in PRTG: Exploring potential requirements and configuration step HP ProLiant system health sensors Update: For Gen10 servers, these sensors no ...

This article applies as of PRTG 22 Since upgrading to VCSA version 6.5 Update 1, VMware sensors are in the Down status due to invalid credentials. AD authentication not working with VCSA 6.5 Update 1 If you have issues with VMware...

This article applies as of PRTG 22 Fix the malfunction of WMI (Windows Management Instrumentation) sensors. Related to WMI configuration or installation, in which important WMI components are missing or were not properly implemented. G...

Important Information: This article is deprecated and is no longer updated. As of October 2023, PRTG no longer supports Windows Server 2012 R2. We recommend you use the most recent version of Windows Server. This article applies as of PRTG 2...

This article applies as of PRTG 22 Requirements regarding the use of Dell sensors, for example the SNMP Dell PowerEdge Physical Disk sensor Requirements for monitoring Dell servers Some of the sensors that monitor Dell servers requir...

This article applies as of PRTG 22 When I open the PRTG web interface, I get an SSL certificate warning in my browser. What does this mean? SSL certificate warning in browsers If you use PRTG outside of your internal LAN, particul...

This article applies as of PRTG 22 Setting up Microsoft 365 Mailbox sensor in PRTG: Obtaining credentials and configuring permissions for Microsoft Graph Important: If you want to use the Microsoft 365 Service Status sensor or the Micro...

This article applies as of PRTG 22 How can I use PRTG with SQL v2 sensors to monitor an error table in my SQL database, ensuring it alerts on errors but remains "Up" when there are no errors? What should the SQL query and senso...

This article applies as of PRTG 22 When I add a Windows Updates Status (PowerShell) sensor to my PRTG installation, an error message appears. The error message is “An unknown security error occurred”. —or— The error message is "...

This article applies as of PRTG 22 I am using an IBM System x server and when I try to add any of the IBM-specific sensors, I get one of the following errors: SensorError Message SNMP IBM System X Logical Disk The sensor could not find any...

This article applies as of PRTG 22 Why does the SSH SAN sensor in PRTG show a different status than the actual status of my SAN device (e.g., HP P2000 showing warnings when the real status is OK)? How can I fix this to ensure PRTG displays t...

This article applies as of PRTG 22 While trying to add a VMware Virtual Machine (SOAP) sensor receiving the following error message: Registering cannot be completed because of a wrong username or password. Resolving the "wron...

This article applies as of PRTG 22 Which steps are necessary to receive push notifications from my PRTG core server on my iOS and Android devices? Push notifications from PRTG With PRTG, you can send free push notifications from your...

This article applies as of PRTG 22 In my network, I set a Ping sensor as the master object for a device. Why don't dependent sensors pause when I manually or by schedule pause the master sensor? How pausing works in PRTG Generall...

This article applies as of PRTG 22 How can I ensure that special characters, such as diacritics and German umlauts, from my custom EXE sensor's script are displayed correctly in PRTG? Correct display of special characters in EXE/S...

This article applies as of PRTG 22 Troubleshoot monitoring issues in PRTG for network shares. Solutions for common errors like logon failures and inaccessible folders, ensuring smooth monitoring Troubleshooting share monitoring with P...

This article applies as of PRTG 22 How can I use a device template in PRTG to create the Zoom Service Status sensor and Modbus TCP and Modbus RTU sensors? Apply Zoom Service Status sensors and Modbus TCP and Modbus RTU sensors via ...

This article applies as of PRTG 22 Explore PRTG QoS Round Trip monitoring, utilizing a Python QoS Reflector script on Linux devices for streamlined QoS measurement without remote probes. QoS round trip monitoring without remote pro...

This article applies as of PRTG 22 When using Chrome to access public maps with audible alerts, audible alerts are no longer playing automatically. Audible alerts and autoplay in Chrome When using Google Chrome to access public maps ...

This article applies as of PRTG 22 Change the ports that PRTG uses for core-probe connections to free available firewall ports according to the needs. Setting core-probe connection ports of PRTG As of PRTG 15.2.17.2896, you cannot ch...

This article applies as of PRTG 22 Customize Windows event log monitoring in PRTG by setting status filters and event source criteria for Event Log sensors, ensuring accurate and efficient monitoring. Event log sensors: Setting cor...

This article applies as of PRTG 22 What are the different kinds of Exchange transport queues and what are they used for? Types of transport queues in Microsoft Exchange PRTG comes with two sensors for monitoring Exchange queues: Ex...

This article applies as of PRTG 22 Which user agent should I use in the HTTP Advanced sensor's settings? This depends on the target device that you are monitoring. Usually, you can use the default setting. Only enter a custom stri...

This article applies as of PRTG 22 Explore how to streamline backup monitoring across various solutions like Veeam, CA ARCserve, and online backups using email notifications and the IMAP sensor of PRTG. Simplify oversight, receive alerts ...

This article applies as of PRTG 22 Understand the Disk free measurements via SNMP and SSH Disk free measurements via SNMP vs. SSH Both the SSH Disk Free and SNMP Linux Disk Free sensors report correct values with their individual method...

This article applies as of PRTG 24 What steps do I need to take to monitor my AWS Linux instances with SSH sensors? Monitoring AWS Linux instances with SSH sensors To monitor your AWS Linux instances using SSH sensors, you need to ta...

This article applies as of PRTG 22 Important notice: The information in this article is outdated. Mini probes are deprecated as the OpenSSL version required to run them is out of support. You can no longer install new mini probes. ...

This article is deprecated!! We no longer update this article. For the most up-to-date information about multifactor authentication with PRTG Hosted Monitor, see the PRTG Manual: Use Multi-Factor Authentication with PRTG Hosted Monitor. This a...

Important: The following article will no longer be updated. For up-to-date information, see the Paessler website: How to use PRTG Enterprise Monitor in an offline environment in 5 steps. This article applies as of PRTG 23.4.90.1299 T...

This article applies as of PRTG 22 I see the following user agent string in the HTTP header of requests to my webserver: Mozilla/5.0 (compatible; PRTGCloudBot/1.0; +https://www.paessler.com/prtgcloudbot; for_[licensehash]) What is th...

This article applies as of PRTG 22 Create Docker certificates with OpenSSL for secure PRTG-Docker communication. Generate CA keys, server keys/certificates, configure Docker, and add sensors in PRTG. Generating Docker certificate a...

This article applies as of PRTG 22 I want to monitor data of my Exchange database other than the default sensors of PRTG provided. Is it possible to show database size, whitespace size, and search index size per mailbox database in PRTG? ...

This article applies as of PRTG 22 In PRTG, QoS sensors have a channel that shows a so-called MOS value. What does this number mean and how does PRTG calculate it? Which factors are considered to get this score? MOS calculation in ...

This article applies as of PRTG 22 Adjusting Packet Sniffer and flow sensor channel configuration: How to customize default settings to suit your network setup Adjusting the default flow and Packet Sniffer channel configuration Th...

This article applies as of PRTG 22 I use some of the web server (HTTP) sensors of PRTG. I am not sure if I have to configure the sensors to show a certain sensor status when receiving a certain HTTP status code. Is there a rule for that? ...

This article applies as of PRTG 22 What is the Redfish standard and which vendors support it? In 2021, we introduced the Redfish Power Supply sensor, the Redfish System Health sensor, and the Redfish Virtual Disk sensor. Redfish Scalabl...

This article applies as of PRTG 22 Error adding SNMP Dell PowerEdge sensor to PRTG, PRTG aborts the sensor deployment and list of common errors with Dell PowerEdge sensors with reasons and troubleshooting solutions. Common errors w...

This article applies as of PRTG 22 Receiving this error message while monitoring SonicWall via SNMP: "Invalid SNMP packet with the note Invalid engineID: 0" -or- Why do the SonicWall sensors cause this error message in the l...

This article applies as of PRTG 22 Why do the SNMP Synology System Health sensor's CPU Load and Memory Free values differ from Synology's resource monitor, and what OIDs does PRTG query for these metrics? Does PRTG perform any calcul...

This article applies as of PRTG 23 In PRTG, SNMP Traffic sensors for an Extreme Switch are not showing traffic above 610 Mbps, even though the actual traffic is not decreasing which persists in both PRTG versions 8 and 14 using SNMP versi...

This article applies as of PRTG 22 When monitoring vSphere Hypervisor (ESXi) version 5.1 or higher, occurs an error message: "The underlying connection was closed: An unexpected error occurred on a send", preventing VMware moni...

This article applies as of PRTG 22 Guide on creating custom WMI sensors in PRTG which involves identifying Windows metrics, formulating WMI queries, testing them, and implementing them using WMI Custom or WMI Custom String sensors. How t...

This article applies as of PRTG 22 Why do I get the warning message Different Time Zones Detected? Time zone warning message in PRTG When opening the PRTG web interface in a browser, you may receive the warning message Different Time...

This article applies as of PRTG 22 Running PowerShell notifications or EXE sensors with Powershell scripts, which PowerShell version is used by PRTG (32-bit, 64-bit) and how do I have to configure the PowerShell Execution Policy Power...

This article applies as of PRTG 22.x.76 Important notice: The following article only applies to PRTG Network Monitor. It does not apply to PRTG Hosted Monitor. How to integrate Okta SSO into PRTG As of PRTG 22.x.76, you can use Okta as sing...

This article applies as of PRTG 22 When opening Logs in the PRTG web interface via the main menu, the log table does not load. The page remains empty and does not display logs, while the mouse pointer indicates that it is loading. How to res...

This article applies as of PRTG 22 How to use a mobile phone or a modem to send short text messages with the PRTG notification system? This way, messages can also be sent when there is no internet connection available. Sending text me...

This article applies as of PRTG 22 Why does auto-discovery add SNMP Traffic sensors for deactivated or disconnected interfaces, and how can I prevent this? Auto-discovery with SNMP Traffic sensors The auto-discovery always creates SN...

This article applies as of PRTG 22 Could you illustrate a setup for the Business Process sensor with some sample use cases? How you can use the Business Process sensor In the following articles, you will find more information on t...

This article applies as of PRTG 22 Monitoring Citrix XenApp servers with PRTG, the connection between the XenApp Delivery Controller and the terminal servers always drops as soon as monitoring is active. How to monitor without any impairm...

This article applies as of PRTG 22 To use one of the Dell PowerVault MDi sensors, it needs the Modular Disk Storage Manager installed on the probe system. Where do I find that software? Find and install the Modular Disk Storage Manage...

This article applies as of PRTG 22 For using Enterprise Virtual Array sensor the manual states that it requires the Command View to be installed on the probe client. Is this necessary? You do not need to install the Command View on...

After installing the latest Windows updates, my Event Log (Windows API) sensors do not work with error messages: "Access Denied, Code:5, or 1314 a required privilege is not held by the client." Workaround for the Event Log (...

This article applies as of PRTG 22 Using the HTTP Full Web Page sensor with Chromium browser engine. After a while, the sensor shows an error message: temp_dir_.CreateUniqueTempDir() Use Windows credentials of parent device with C...

This article applies as of PRTG 22 Using HTTP Full Web Page sensor, Receiving error message :  Unable to navigate (ERR_NAME_NOT_RESOLVED). HTTP Full Web Page sensor: “Unable to navigate” The HTTP Full Web Page sensor can load web pa...

This article applies as of PRTG 22 How can I change the default viewport size for HTTP Full Web Page sensor screenshots in PhantomJS mode to ensure they appear in a common desktop size rather than mobile format? Defining viewport size...

The probe device reported low disk usage which was due to millions of jscript files in the temp folder: C:\Windows\SysWOW64\config\systemprofile\AppData\Local\Microsoft\Windows\INetCache\IE this is related to URLs we monitor using the HTTP...

This article applies as of PRTG 22 Requirements and usage of the HTTP XML/REST Value sensor HTTP XML/REST Value sensor: FAQ See the following articles about the HTTP XML/REST Value sensor: Is there a tool available that can help me...

This article applies as of PRTG 22 Checking content of multipart emails with the IMAP sensor The internet standard Multipurpose Internet Mail Extensions (MIME), an extension of the original Simple Mail Transfer Protocol (SMTP), allows...

This article applies as of PRTG 22 Is there a list of blacklist servers available that I can use with the IP on DNS Blacklist sensor? IP address on DNS blacklist servers By default, the IP on DNS Blacklist sensor checks some default bla...

This article applies as of PRTG 22 How can I find the names of available performance counters and add them to a PerfCounter Custom sensor in PRTG for monitoring? Obtaining performance counters Depending on the target system, the list...

This article applies as of PRTG 22 While using the QoS Round Trip sensor to monitor the network connection quality between two probes: Note: You must ensure that firewalls, NAT rules, etc. will allow the UDP packets to reach the target p...

This article applies as of PRTG 24 Script v2 sensor JSON output schema This is the JSON schema that the Script v2 sensor verifies the script or native executable output against: For more information about JSON schema, see http://json-sch...

This article applies as of PRTG 22 After updating QNAP recently then started receiving DoS alarms when monitoring it via SNMP. What is causing this and how to fix? QNAP SNMP DoS alarms and system information With certain QNAP firmwar...

This article applies as of PRTG 22 My SNMP System Uptime sensor shows incorrect uptimes. For example, Windows reports 153 days, but PRTG shows only 4 days. Is the sensor querying the correct OID? How can I fix this issue? Incorrect sy...

This article applies as of PRTG 23 I use the Veeam Backup Job Status Advanced sensor and want it to show Down when a backup job is not scheduled. How can I achieve this? Change lookup file in the Job Scheduled channel The Veeam Backu...

This article applies as of PRTG 22 An enabled FIPS mode in Windows system causes sensor error: 'Exception has been thrown by the target of an invocation'. Why does PRTG require a disabled FIPS? Disable the FIPS mode on Windows...

This article applies as of PRTG 22 Monitor IBM System X servers with the available SNMP sensors.  Monitoring IBM System X To monitor IBM System X servers, add one of the following sensors to the corresponding device in PRTG: SNMP I...

This article applies as of PRTG 22 Can an SQL sensor set a specific status based on string values retrieved from a database? Best practice for string search in SQL databases The native SQL sensors of PRTG provide several options t...

This article applies as of PRTG 19 Monitor the results of specific queries using PRTG. Can I use it for alerting and notifications? Configuration of SQL v2 sensors There are a couple of SQL sensor types available in PRTG: ADO SQL v2 ...

This article applies as of PRTG 22 How can I make sure that my SNMP Trap Receiver, Syslog Receiver, or Event Log sensors stay in the Down status for longer than one scanning interval, even if the issue isn't ongoing? Using notificati...

This article applies as of PRTG 22 Whenever I try to use a PowerShell sensor with a server or computer that is not joined to the domain, I get the message "Connecting to remote server failed: WinRM cannot process the request."  Th...

This article applies as of PRTG 22 How do I enter multiple parameters for an EXE/Script sensor in PRTG and ensure they are correctly forwarded to my script? Using parameters with EXE/Script sensors To correctly pass one or more paramete...

This article applies as of PRTG 22 How do I activate Message Queuing in my Windows installation in order to use the Windows MSMQ Queue Length sensor? MSMQ Message Queuing To use the Windows MSMQ Queue Length sensor in PRTG, you need to ...

This article applies as of PRTG 22 Monitoring Windows Server Update Services with the WSUS Statistics sensor. Is the data between PRTG and the WSUS server always encrypted? Windows Server Update Services (WSUS) and SSL encryption If you...

This article applies as of PRTG 22 To show geographical maps in the PRTG web interface. Which preconfigured map provider is best, and where can I find more information about these providers? Important notice: If you used CloudMade bef...

This article applies as of PRTG 22 How to get an API key for Google Static Maps API to use it in PRTG? Acquiring an API key to use Google Maps in PRTG Important notice: To use Google Maps in PRTG Network Monitor version 13 or later, ...

This article applies as of PRTG 24.3.99  To get notified via Slack or Microsoft Teams, need to provide a webhook in the PRTG notification settings. How to get webhooks for Slack and Microsoft Teams? How to configure webhooks for PRTG no...

This article applies as of PRTG 23 I manage multiple PRTG instances using the PRTG desktop and mobile apps. However, push notifications often lead to the wrong instance. How can I fix this? Troubleshooting erratic behavior of push notifi...

This article applies as of PRTG 23 I use single sign-on for PRTG and want to further improve the security for sign-in events. How can I do that? Security improvements for sign-in events by using multifactor authentication for Microsoft ...

This article applies as of PRTG 22 Using Mozilla Firefox web browser to connect to the PRTG web interface. Is it secure to access PRTG with Firefox? Are there cross-site scripting vulnerabilities that make XSS exploits possible? XSS expl...

This article applies as of PRTG 23 I want to update PRTG from an older version such as 16.1.21 or earlier. What steps do I need to take? Updating from previous versions Update from PRTG 13.1.1 through 16.1.2 As of PRTG 16.1.22, PRTG i...

This article applies as of PRTG 21.1.65 Since the update to PRTG 21.1.65, Unable to open the PRTG web interface by double-clicking the desktop shortcut. The Windows User Account Control opens and asks for administrator credentials. Work...