I want to know the steps and sensors to use to monitor vCenter. Monitoring vCenter with PRTG In PRTG, add your vCenter as a device. In the device settings, please do not forget to enter Credentials for VMware/XEN Servers and save your setti...

This article applies to PRTG Network Monitor 14 and later What are the main reasons for notification problems? How to check my configuration if I want to debug a notifications problem in case I do not get any notifications? Top 5 reasons f...

Need a Linux version of the probe software so that we can embed it into a Linux based security appliance and collect the performance data. It is possible to set up a probe on a Linux machine. You have the following options: PRTG Mini Probe A...

This article applies as of PRTG 22 I want to export the monitoring data of PRTG to a .csv or .xml file on a daily basis. This way, I can analyze the data in my own software or import it to Microsoft Excel Exporting historic sensor data int...

After applying the June 2022 Windows Server Patch (KB5014702) on Server 2016, WMI queries fail with the error (80070005: Access is denied) (code: PE015). How to resolve this issue without uninstalling the patch ? If you recently installed Wind...

We need to monitor several SSL certificates. Our internal CA publishes a CRL, accessible from the PRTG server, and is in the trusted root. the SSL certificate sensor is still in the warning state for all internal CAs: Warning by lookup value ...

I get a warning in the new SSL certificate sensors in my network (not in the SSL security check sensors). What does it mean, and how can I fix it? These sensors are on a gateway and a web server. When opening a certificate to view its details,...

We use RedHat Enteprise Linux in our Environment and would like to get the status of systemd-Services in PRTG. What would be the best way to achieve this in PRTG? Is it somehow possible to do it via SNMP? Take this article as basis and create ...

Can I export my current PRTG configuration (sensors and devices) to use as a template for new installations, changing only host names, IP addresses, and logins? If so, how? All (with very few exceptions) of PRTG's configurations are stored...

I want to monitor windows DHCP scope release, ideally the sensor can return to a percent, which is showing in which percent address is in used. Way to monitor DHCP statistics per scope Summary Monitor DHCP statistics, using DHCP MIB and P...

Having problems configuring Office 365 SMTP relay in notification settings. Particular configuration values work well when tested from the same server via PowerShell. How can I find why my "Connection failed"? Tested the PRTG mail de...

How to monitor DFS replication on several servers/sites? Modified and extended version for DFS monitoring One of the challenges with DFS is to monitor the DFS replication backlog. There are various scripts out there to accomplish this. Unfort...

We are using SIEM tools to monitor logs for incidents. How can we integrate the PRTG Network monitor with SIEM. In which path the logs are stored. Is it possible to pull the Logs from the Database of PRTG. Thanks, Ranjith Article ...

Issue with adding a session in PRTG for Windows Server 2019 and CentOS 7 systems getting error:  No response (check: firewalls, routing, snmp settings of device, IPs, SNMP version, community, passwords etc) (SNMP error # -2003) The error -200...

If I try to add an SNMP sensor for the server on PRTG, I get this error: The sensor could not find any matching data on the monitored device. To resolve this issue, check if SNMP is enabled on the device. Also check if the Dell OpenManage Serve...

How do I disable SSLv3 and TLSv1.0 support and update the PRTG Demo Certificate to use a stronger algorithm to comply with PCI DSS requirements? Option for disabling TLS1.0 is now available starting with version 18.3.44.2054. Disclaimer:...

My HP-UX sensors in PRTG are "paused by dependency" and won't resume. How can I fix this? You need to check where the dependency "starts". Are these sensors set to be dependent on another in their Settings tab, or maybe...

I want to use the Google Analytics sensor of PRTG. How do I determine my "Profile ID"? Determine your Google Analytics Profile ID If you don't know your profile ID, please open the Google Analytics website, login, and select the...

How do I reduce the size of the Monitoring Database folder? By default, historic data (in monitoring database) are kept for 365 days. If you want to keep less monitoring data on the hard disk, you can change the automatic data purging limits: ...

Is it possible to monitor Postfix e-mail queue on an e-mail server running Ubuntu 8.04 LTS? I would like notification when the queue is 250 e-mails You can monitor the queues with a simple bash script: #!/bin/bash # 20.06.2011 - JJaritsch @ ...

I want to use a sensor to monitor my SSL certificates so that it tells me when they are about to expire. Anyone know if this is possible? Usage instructions/example It's possible to monitor a certificate's expiration with the native/b...

This article applies to PRTG Network Monitor 12 or later, as well as to previous (deprecated) versions Can you give an example of how I can create a PowerShell (*.ps1) script to execute custom notifications in PRTG? Demo 'PowerShell...

This article applies as of PRTG 24 I want to use a PowerShell script to set up a notification in PRTG to send alerts using the PagerDuty Events API v2. Which steps do I have to take? How to use the PagerDuty Events API v2 with notification...

How can I fix the No Such Instance (SNMP Errors #223) error on a PRTG System Health Temperature sensor for a Cisco device, which resumes polling data when paused and resumed or recreated? The error message appears when a metric that was availa...

How can I create a PRTG sensor to monitor a single SNMP MIB OID for temperature as my old program does? The Cisco System Health sensor doesn't show temperatures. Our Cisco System Health sensor can also monitor the temperatures on the de...

I'm getting an SNMPERR_AUTHENTICATION_FAILURE (SNMP error # -35) error in PRTG for a new Cisco Nexus 5672UP, even though it's configured the same as the old one and other devices with the same SNMPv3 credentials work fine. What could be ...

How can I monitor an Eaton Powerware USV with ConnectUPS Web/SNMP Card? We currently do not have a sensor dedicated to monitoring Eaton Powerware UPS.  Check if the vendor offers any MIBs that you can import into PRTG using the MIB importe...

This article applies as of PRTG 25 and multi-platform probe 3.1.1 Where can I find release notes concerning just the multi-platform probe? Important notice: We strongly recommend to only use the multi-platform probe with as of PRTG 24.1.9...

I'm successfully monitoring local Fortigate interface traffic, but can't autodetect or manually configure SNMP Traffic sensors for a remote Fortigate over IPSEC VPN. By default, Fortigate blocks SNMP queries destined for the WAN interf...

How can I configure PRTG to accept both the internal URL and the Azure Application Proxy URL for SSO? Follow this guide to configure Azure SSO: https://kb.paessler.com/en/topic/88527 The external address would need to read https://prtg-compan...

In version PRTG16.2.23.3270, trying to start the PRTG core service results in the message "sorry, could not start prtg core server (web server)" There is no known issue in regard to the service start in version 16.2.23.3270 in genera...

This article applies to as of PRTG 16 and as of PRTG for Android How can I resolve the "could not retrieve passhash" login error with the PRTG Android app on Android N, while the same credentials work via a web browser? Failed Lo...

How can I monitor a Domain Controller server (WMI CPU/Memory/Disk) without adding the PRTG account to the Domain Admins group? To monitor servers by using an account with the most limited privileges, you need to make sure that the user account...

I have three web servers with several app pools that are being monitored through PRTG. I keep getting the following error: Unable to connect to the specified computer, or the computer is offline. (Performance Counter error 0x800007D0) Please t...

I’m trying to monitor a Rittal LCP using an SNMP library sensor but get the following error: “No such Object error #222.” What should I do? The error message indicates that there is no response to the requested OIDs on the target device here. ...

Just installed PRTG on a Win Server 2016 Hyper-V VM, and right from the start the Probe Health sensor gave me the error "Probe disconnected". Please verify that the PRTG probe service is running on the server PRTG is installed and th...

How can I monitor ma DELL ME4 Series Storage? (is a ME4012 Model). This version uses the Web Interface for configuration and the PowerVault client is no longer supported. If the device supports SNMP, you can use one of our SNMP custom sensors....

This article applies to as of PRTG 15.4.21 Am I able to change the format of the e-mail notifications? I am particularly interested in modifying the subject line. Modifying the Format of Email Notifications You can change the format of em...

I am getting an 90 Day Age of Code error but I don't believe there are any updates needed. If you have this warning as a result of PRTG 19.3.51, this warning is ok - it's actually our own fault. We released PRTG 19.3.51.2725, but then ...

I can't add a domain user to PRTG despite AD integration. I can add AD groups but not domain users, only local PRTG users are available. What am I doing wrong? Did you review our Active-Directory Integration manual section? PRTG Manual: ...

This article applies to as of PRTG 15.4.21 I want to brand HTML emails that PRTG sends out with a custom icon. Is it possible to add my company logo to email notifications, for example? How can I use a logo in HTML emails from PRTG? Custom...

How can I stop PRTG from sending "Paused by Dependency" and "Resumed by Dependency" notifications for edge switches dependent on a core switch? It is not possible to disable certain 'Off Notifications'. However, you...

I'm trying to monitor a Synology NAS with new SNMP sensors, but PRTG cannot find it and generates SNMP errors. Do I need to set up probes or is there a specific method for monitoring a Synology NAS? I'm afraid we are not able to reprod...

How can I prevent "Unusual" (orange) alerts in PRTG without deleting the tests or losing data? The unusual detection can be configured via Setup | System Administration | Monitoring. Enabling/disabling is done on a per-object ...

The activation page is refreshed but this error message continues to appear: Status of license: Not activated Failed to establish secure connection Socket Error # 11001 Host not found. The most likely cause of this error is an incorrect activ...

NetApp has announced End of availability for ONTAPI. What are your plans with NetApp ONTAP (ONTAPI) sensors and migration to native REST API? We re-wrote our NetApp sensors to use the new REST API. E.g. the NetApp System Health v2 Sensor ...

This article applies to PRTG Network Monitor 16.3.25 or later How can I monitor Dell Compellent and other Dell Storage Systems ? Monitoring Dell Compellent and other Dell Storage Systems While we have some built-in sensors that may work w...

Unable to start the SNMP service on CentOS 7 servers, encountering errors related to duplicate IPv4 address detection and issues with opening the specified endpoint. The specific error messages include: Error opening specified endpoint  Server E...

Is "Traffic In" defined as the traffic that's coming from the connected device INTO the port while "Traffic Out" is the traffic that's flowing out of the switch TO the connected device? Usually "Traffic In"...

In most cases, we use Domain Admin account for any WMI sensor. Is there a way to set individual account only for PRTG WMI access WITHOUT Domain or Local Administrative Rights? The permissions required for WMI haven't changed that much. ...

Can I check for specific HTTP Response codes with PRTG? There is no native sensor within PRTG which can do this but you may use the following Powershell script variant to use with an EXE/Script Advanced sensor: <# .SYNOPSIS Query an HTT...

I would like to know if there is a way to move multiple devices to other group at once. Go to Group Root (Devices | All). Select Management. You should now be able to select multiple devices by clicking on them when holding down "CTRL&q...

Trying to install netmiko or other modules dependent upon the future module fails with: AttributeError: type object 'Distribution' has no attribute '_finalize_feature_opts' Disclaimer: Please note that the following steps are n...

This article applies as of PRTG 22 I want to use the SSH Script sensor. Is there an example? What is the return format? SSH Script sensor The expected return format for the scripts used with the SSH Script sensor is documented in the PRTG...

This article applies to PRTG Network Monitor 13 or later, as well as to previous (deprecated) versions I want to monitor system parameters like CPU load and memory on a Linux or UNIX system via SNMP. How does PRTG support this? 1. Install ...

I started a free trial at my-prtg.com. However, time and data values are displayed in American format. Where can I change this? By default, PRTG uses the date format (and time zone) of the underlying Windows operating system. For PRTG Hosted ...

This article applies as of PRTG 22 How does PRTG decide if an accepted protocol is rated weak or strong in the SSL Security Check sensor to monitor SSL/TLS connectivity? For example, why does it consider TLS 1.0 weak and issue a Warning stat...

I keep getting this error intermittently on one of my switches: SNMPv3SNMPERR_UNKNOWN_USER_NAME (SNMP error # -33). There isn't much more that PRTG can log there actually. What you see is the error message that the target device actually t...

Can I change the default HTTPS port (443) that PRTG uses to a different port, especially for external access, to avoid conflicts with our VPN server also using port 443? For the Alpha UI, you need to make the change in the PRTG Administration ...

This applies as of PRTG 23.4.91 and Multi-Platform Probe 0.19 I want to use the Multi-Platform Probe, but it requires a Transport Layer Security (TLS) Certificate. What is TLS and how can I create a TLS certificate to use with the Multi-Plat...

This article applies to PRTG Network Monitor 16 or later I would like to monitor the health of my HP ProCurve switches, but there is no dedicated sensor. Additionally, SNMP CPU and Memory don't work on the appliance. Any workaround? In...

This article applies as of PRTG 22 How do I activate the CIM server on ESXi 6.5 or later to monitor hardware information using WBEM? Enabling the CIM module on VMware ESXi 6.5 or later PRTG provides two technologies to monitor VMware host...

This article applies as of PRTG 22 I would like to send SNMP traps as notifications, so that my trap receiver can process them. Is this possible? Documentation of SNMP traps sent by PRTG PRTG comes with an SNMP Trap Receiver sensor. It ca...

This article applies as of PRTG 25 I have an awesome new feature idea (either functional or sensor-wise) for PRTG. What is the best way to request its implementation and make sure that it is not forgotten? Important Notice: You can continu...

The AVM Fritzbox does not offer monitoring capability though SNMP or other standard monitoring technologies. Can I monitor the bandwidth usage of the DSL, ADSL or VDSL Internet connection using PRTG? Important note: The AVM FRITZ!Box WAN Inter...

I would like to use PRTG. However we can only install it on a virtual machine. Can I use Linux OS on the virtual machine to run the PRTG? Currently it is not possible to install the PRTG core server on Linux/Unix systems. In order to run a PRT...

On one of our probes, the health sensor shows the following warning: 227 Items (Open Requests) is above the warning limit of 100 Items. Interval delay WMI currently shows a 21% delay. How can we troubleshoot this ? This sounds like the probe i...

Trying to monitor services on a remote server 2012r2 with a WMI sensor but got an error: TOctCheckWMIMetaBase.MetaWork: timeout while waiting in WorkEnter. The server is reachable, WMI Tester shows no errors, and using a domain admin account. ...

This article applies to PRTG Network Monitor 15 or later How can I monitor login credentials for a web page with PRTG to check if a username/password combination results in an unsuccessful login attempt? Checking login credentials for a we...

A custom sensor for monitoring Veeam Backup & Recovery (B&R) with PRTG, created by mycloudrevolution.com. It solves integration issues between Veeam's 64-bit PowerShell Plugin and PRTG's 32-bit environment using the PSx64 tool. Th...

This article applies to PRTG Network Monitor 16.2.25 or later I imported the Meraki MIB file and set up SNMP library sensors for access points and SSIDs to monitor Meraki network using PRTG. How can I group related Meraki access point sensor...

This article applies as of PRTG 22 I would like to track the usage of the web pages in my PRTG installation with Google Analytics. Is it possible to use Google Universal Analytics with PRTG? How can I collect usage data of the PRTG web inter...

Our HP DL380 G9, monitored via iLO4, shows a degraded state in the ProLiant System Health sensor due to an unconfigured RAID array. The CPU fan channel shows "other" as there are only chassis fans. The iLO status is OK, with all other ...

All other WMI sensor on that server are running fine receiving the error message from CPU Load Sensor: WMI: 80041017: The query was not syntactically valid. -- PerfCounter: The specified object is not found on the system. (Error # 0xC0000BB8) ...

Unable to add Fortigate SNMP sensor on PRTG. See the article PRTG in Fortigate for setting up an SNMP Traffic sensor for Fortigate. Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at yo...

This article applies as of PRTG 20 I want to add custom icons that I can use in the PRTG web interface in a device's settings. Is it possible to add icons to the standard icons? Add custom device icons To extend the device icons avail...

This article applies to PRTG Network Monitor 16.3.25 or later I have a Cisco Wireless LAN managed by a WLC appliance. How can I use PRTG to obtain meaningful information from this appliance also to get alerts if anything goes wrong? Are ther...

This article applies as of PRTG 22 The SNMP NetApp Disk Free sensor shows free disk space in percent and absolute values. I want to also display the maximum capacity of NetApp volumes and the entire NetApp storage system, and compare it to t...

This article applies as of PRTG 22 Using the SNMP Cisco ASA VPN Traffic sensor and the tunnel is established with IKEv2 (shown type: User to LAN), receiving error message:  There is no active connection for this remote IP address. The reaso...

This article applies as of PRTG 22 Having an older APC UPS that only has a serial monitoring port so the default SNMP sensor for APC does not work. Can I monitor this UPS device? Monitoring an APC UPS with serial monitoring port using a...

This article applies to PRTG Network Monitor 19 or later When generating very large reports, PRTG runs into a timeout. How can I increase the default timeout value for report generation? Change report timeout value By default, PRTG allows...

How can I display more items on the "Google Maps" based GEO map in PRTG, and are there any tricks to create a web page with more mapped icons? Also, why isn't the map interactive, and will that feature be available? Note: The ...

I would like to try other user interfaces (web interface, Windows GUI) than those which come with the standard setup of PRTG. If there are any, where can I get them? Alternative user interfaces by other PRTG users If you're looking for al...

This article applies as of PRTG 21 After an update to PRTG version 13.2.3, all customizations to the web interface are lost. What has happened? Important: The current customization approach is unsupported and deprecated as of versions 17.3...

This article applies to PRTG Network Monitor 7 or later I would like to monitor the free disk space of my web server. It supports PHP. Can I use a PHP script to remotely monitor my server's parameters? Remotely monitoring free disk spa...

If you set up auto-discovery, i.e. on a group that is part of a remote probe, does that create a workload on the remote probe, or on the main server? Both are the case. The probe does the actual scanning, whereas the PRTG core server forwards ...

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 25 Multi-platform probe compatibility The multi-platform probe vers...

This article applies as of PRTG 25 I want to use the REST Custom v2 sensor with XPath or JSON. Are there any recommended resources that can help me understand these topics in relation to PRTG? Rest Custom v2 The REST Custom v2 sensor queri...

Note: You can also connect PRTG SLA Reporter and PRTG Data Exporter to your PRTG installation for customized service level and process level overviews, and for central alerting. For more information see PRTG SLA Reporter and PRTG Data Exporter. ...

What do I need to be aware of regarding the new endpoints of the PRTG API v2 starting as of PRTG 24.3.100? This article applies as of PRTG 24.x.100 Changes in PRTG API v2 For users who already use the PRTG API v2, there are a number of importa...

Deploying Remote Probes For a general introduction to remote probes, please see manual section Remote Probes and Multiple Probes. You can perform a remote installation of a probe directly via PRTG's web interface: PRTG Manual: Remote Probe...

After installation, I want to change the system language of the PRTG web interface. This article applies as of PRTG 24 Change the language of the PRTG web interface In PRTG You can change the system language of PRTG in the PRTG web int...

I have a Cisco Wireless LAN which is managed by a WLC appliance. Is there any way to obtain meaningful information from the appliance using PRTG? Are there built-in sensors I can use? This device's operation is very sensitive for my organiz...

Can I upgrade to newer PRTG version manually after maintenance contract expired? Important Notice: PRTG Network Monitor has moved to a subscription-based licensing model as of July 1st 2024. Perpetual licenses with maintenance renewal are no l...

I want to use PRTG in an industrial environment. This requires OPC communication so the sensor alarms can be linked to the normal SCADA/HMI alarms. Is it possible to set this up? The article applies as of PRTG 23 Monitoring OT environments ...

In data tables of PRTG Network Monitor there is a special column "Coverage". What do the percentage values mean? "Coverage" column in PRTG When viewing live graphs or reports in PRTG, there is a special column "Covera...

This article applies as of PRTG 22 Instructions on how to set up Sigfox callbacks and configure the HTTP IoT Push Data Advanced sensor in PRTG to monitor Sigfox Geolocation data.  Monitoring Sigfox geolocation with PRTG Sigfox Geolocat...

This article applies as of PRTG 22 Learn how to leverage PRTG's REST Custom sensor to monitor Sigfox v2 API, ensuring seamless integration and data monitoring. Monitoring the Sigfox v2 API with the REST Custom sensor Important Notice:...

This article applies as of PRTG 22 I have a device with Sigfox connectivity that measures temperature and humidity using callbacks. How can I monitor these with PRTG? Monitoring Sigfox callbacks with PRTG With PRTG, you can monitor Sig...

This article applies as of PRTG 22 How exactly do I extract values from an XML node using the HTTP XML/REST Value sensor of PRTG? Extracting XML nodes The HTTP XML/REST Value sensor can parse different XML outputs. The notation is XPath c...