Release notes
for the "stable" release channel

In this most conservative channel you receive the best tested versions. We recommend that you use PRTG's stable versions for live environments.

Please use the "Auto-Update" feature to update your PRTG installation: In the PRTG web interface, simply navigate to Setup | Auto Update. You can also obtain the latest version from the PRTG download page!

Download PRTG · Manual: "Software Auto-Update" · Previous Versions and other Release Channels

April 10th 2024 - Version 24.2.94.1400

New

Multi-Platform Probe

Multi-Platform Probe Stable Release	We are happy to announce that the multi-platform probe has entered its stable status after extensive feedback and testing and it's now recommended for productive use. While the classic remote probe is used on Windows systems, the multi-platform probe allows you to deploy probes on various non-Windows systems. These include Debian, Ubuntu, Redhat, and ARM-based systems. Key Features: Cross-platform compatibility: Deploy probes on various non-Windows operating systems. Enhanced stability: The multi-platform probe has undergone rigorous testing to ensure stability and reliability. Expanded use cases: Unlock new possibilities by utilizing sensors and probes on diverse platforms. Upgrade your monitoring capabilities with the multi-platform probe! For more information about the multi-platform probe and how to use it, please see Multi-Platform Probe for PRTG manual. For detailed release notes about this release, see our Knowledge Base article: What are the release notes for the Multi-Platform Probe?.
Probe Adapter	You will now need to configure the probe adapter connection to the NATS server through the PRTG web interface. You can set up your probe adapter configuration in the Core & Probes tab of the System Administration in the Multi-Platform Probe Connection Settings section. In this section you can choose the Multi-Platform Probe Connections, add a NATS Server URL, NATS Server Name, NATS Password, choose the NATS Server Certificate Authority Handling and finally choose the Connection Log Level where you can define the log severity level to determine which logs appear in the probe adapter log file. For this field you can choose one of the options offered from a dropdown menu: Error, Warning, Info (default), Debug, Trace. With this PRTG version we introduce a new Multi-Platform Probe Connection Health (Autonomous) sensor that will inform you of the NATS server connection with your Multi-Platform probe and is created automatically when you have activated Allow multi-platform probe connections in the Core & Probes settings of your PRTG installation. The sensor comes with the channel NATS Connection state that has the lookup values Disabled, Connected and Disconnected. When you have disabled the setting for Allow multi-platform probe connections the sensor will display an according error message and return the value Disabled. Please note that the sensor is in BETA status but you do not need to enable the BETA feature in order to get this sensor created. This sensor type only concerns the connection between Probe Adapter and NATS server.
Multi-Platform Probe Connection settings	We added the NATS Connection Security toggle in the Multi-Platform Probe Connection Settings to explicitly set the security schema used. The configuration for connecting the PRTG core server to a NATS server has changed. The schema is now an explicit toggle instead of encoded into the NATS URL. The NATS URL setting was changed to NATS Server Host, which is made up of the hostname and port of the NATS Server. After this update, the NATS Server Host setting will be reset to the default localhost:23561 value and users will need to reconfigure their NATS server. Important for PRTG Hosted Monitor: This setting is not visible for PRTG Hosted Monitor instances. Customers will be informed separately, as soon as the multi-platform probe can be used with PRTG Hosted Monitor.

Improved

Security

PRTG configuration file	Credentials like passwords in the PRTG configuration file are now masked when you use the option Include configuration file (contains passwords) for Send Logs to Paessler in the PRTG Administration Tool in order to send a support bundle. When you have a larger configuration file, e.g. 355 MB and run the PRTG Administration Tool as a 32 bit version, you will receive a message that PRTG was not able to hide encrypted passwords in the configuration file. The same behavior applies when you want to send a support bundle with a broken configuration file. You will then be asked if you still want to include the configuration file containing passwords or not. Please note that currently is not possible to start the Administration Tool for a Remote Probe running on a 64-bit operating system. As a workaround go to the Program Files (x86) folder, open the PRTG Network Monitor folder, and run the 32-bit version of the Administration tool. We will deliver a fix for this issue in the upcoming PRTG versions.
Sensors	The behavior of the Environment setting was changed for the EXE/Script and EXE/Script Advanced sensors to prevent remote code execution for Batch (.bat) scripts. Thanks to IT Matters Most GmbH who made us aware of that vulnerability and which can be tracked under CVE-2024-28055, with severity 7.2 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Please note that this change might cause your running custom scripts to fail as it is no longer possible to use the environment variables placeholders in the Parameters setting for Batch (.bat) scripts anymore.
Webserver	We hardened PRTG against possible Cross-Site Scripting attacks via User Agent in the browser. We fixed an open redirect which could potentially be used for phishing and other purposes. The severity is 4.3-Medium and calculated as CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N. We hardened PRTG against possible Cross-Site Scripting (XSS) attacks during Probe creation. The severity is 6.9-Medium and calculated as CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:H/A:N.

Improved

Server

Logging

You will now see a log entry in the History tab of a device when you have enabled or disabled the inheritance of an object. For example, if you enable the Inherit From feature toggle for Credentials for Windows Systems, it will be logged as Credentials for Windows Systems: Inherited in the History tab of the device.

Single Sign-on

We improved the Single Sign-on handling for PRTG user integration in Microsoft Azure AD to support the Microsoft Graph API for paging when a user is assigned to more than 100 groups. Previously, the issue occurred in certain cases that a user with Microsoft Azure AD integration could not log in to PRTG via Single Sign-on when he was assigned to more than 100 groups. Due to limitations in the Access Token concerning the group memberships we need to switch to Microsoft Graph API for paging what was not yet supported by PRTG. The user would then receive the message that the login has failed. In the Core.log you could also find this error message for the user login: is no member of SSO groups allowed by PRTG.

Fixed

WebGUI

Find duplicates

We fixed an issue for the Find Duplicates feature on /api/findduplicates.htm. Previously, if you selected the option Find Duplicates from the device Context menu the result you would have received was empty.

Note

Sensors

Discontinued sensors with PRTG 24.2.94

With this version we discontinue the below already deprecated sensors:

Amazon CloudWatch sensors (announced as deprecated with PRTG version 22.3.78.1873)
Cloud HTTP sensor and Cloud Ping sensor (announced as deprecated with PRTG version 22.3.78.1873)
DNS sensor (announced as deprecated with PRTG version 21.2.69.1308)
REST Dell EMC sensors (announced as deprecated with PRTG version 21.2.67.1531)

If you run any of these sensor types they will show an error message This sensor type was removed from PRTG. For more information, see https://kb.paessler.com/en/topic/68227. (code:PE258), when you update your PRTG installations to version 24.1.94. You can pause existing sensors afterwards but you will not be able to deploy them anymore.

For further information about sensor deprecation and discontinuation in general as well as successor sensors and sensor alternatives please see our Knowledge Base articles: What do deprecation and discontinuation in the context of sensors mean? and What sensors are deprecated and what are their successors or alternatives?

Changed

Sensors

VMware Datastore (SOAP) sensor

We changed Bytes (File) to Bytes (Disk) in the Channel Unit Configuration of the VMware Datastore (SOAP) sensor to better match the size of datastores. Please note that this change will come into effect only when you add this sensor type as new and does not affect any existing sensors.

Fixed

Sensors

HTTP Transaction sensor	We fixed an issue for the HTTP transaction sensor that could not access a target URL anymore in certain cases and reported the error message String not found in the previous PRTG version, or when you changed to Compatibility engine in the sensor settings the error message was Object reference not set to an instance of an object.
Memory	We fixed an issue that could cause a higher memory consumption especially on the Multi-Platform Probe when you ran MQTT sensors and OPC UA sensors on your system. We therefore also updated our MQTT library to version 1.3.13 what patches several issues.
Microsoft Azure SQL Database sensor	Your Microsoft Azure SQL Database sensor will now report an according sensor message when the monitored single database or elastic pool is in a different state then Online or Ready. Previously, the sensor reported an error message The queried field "average,count,maximum,minimum,total" is empty. when, for example, the queried database was in status Paused.
Oracle SQL v2	We fixed an issue for the Oracle SQL v2 sensor that reported an error The type initializer for OracleInternal.Common.ProviderConfig threw an exception when Oracle Data Access Components (ODAC) was installed on the system where also the sensor was added, e.g. on a remote probe. The sensor then went into an error state in this case because one of the Oracle assembly references did not match.
QoS (Quality of Service) One Way sensor	The QoS (Quality of Service) One Way sensor now no longer displays any IP address in the Quality of Service Measurement section for Target Probe when you are about to create this sensor type. Previously, the sensor displayed 127.0.0.1 for the local probe what did not reflect the actual probe ID being used.
Sensor logs	The Result of Sensor.txt file will now be updated again when you have activated the Store result option for Debug Options in the sensor Settings. Updating the Result of Sensor.txt file did not work anymore in the previous PRTG versions for certain sensor types. This issue affected sensor types like Traceroute Hop Count sensor, Windows Print Queue sensor and Active Directory Replication Errors sensor, for example.
Sensor message	We fixed an issue where in certain cases the message reported by the sensor suddenly displayed only OK after some time. In these cases the message of the sensor was reverted from the original to OK when the message sent from Probe to Core contained an empty string for some reason. The issue occurred for sensor types like WMI Custom String sensor, SNMP Custom String sensor and REST Custom v2 sensor.
Sensor settings	We fixed an issue that occurred for certain sensor types, like the SNMP Custom v2 sensor, where an additional text overlapping the help box was displayed in the section for Schedules, Dependencies and Maintenance Window. Additionally the default dates for Maintenance Begins and Maintenance Ends were not displayed correctly.
SNMP HPE ProLiant Physical Disk Sensor	We fixed an issue for the SNMP HPE ProLiant Physical Disk Sensor that reported an error Disk: Required field, not defined when you added multiple disks where at least one disk was defective, e.g. did not report serial number and model values. As a result, the sensor could not be created and additionally the PRTG configuration file could also no longer be saved. You will now be able to save your PRTG configuration file again even if your SNMP HPE ProLiant Physical Disk sensor includes a defective disk.
SNMP Memory sensor	We fixed an issue for the SNMP Memory sensor that reported the error message (value)' is not a valid integer value in certain cases. The issue occurred because certain devices falsely returned counter values instead of integer values for the storage size in the OID 'hrStorageSize' (1.3.6.1.2.1.25.2.3.1.5) what the sensor then could not process correctly.
Windows Print Queue sensor	We fixed an issue for the Windows Print Queue sensor that did not report the correct sensor message when monitored printers were offline or paused. The sensor wrongly reported the status message up in these cases.

Fixed

Server

API	We fixed an issue where in certain cases API calls to PRTG failed with the error Unauthorized although the API token was valid. For example, when you use the API endpoint /api/table.json to reach PRTG with a valid created API key, it could happen that the call resulted in an Unauthorized message.
Maps	We fixed an issue where the public map display resulted in an empty window if a read-only user had access only to one object on the map. The issue occurred when the objects were linked with a connector and the read-only user had access only to one of these objects. When the map was opened in a separate incognito window with the option Public Access without login, it would only display an empty page, although the Security Context was set to the read-only user. Your public map display will now work properly again when you are logged in to PRTG with a user that has No access to the relevant map. Previously, when you opened a map with the link for Public Access and you were logged in to PRTG with a user that has No access under Access Rights for the map, the page would then display Map refresh failed, although the map was configured for public access.
Multi-edit	You will now be able to save the settings for all your selected sensors when you use the multi-edit function. This did not work properly before in the previous PRTG versions in certain cases. Saving the value Maximum (Mbit/s) for the channel Traffic Total when you have selected several SNMP Traffic sensors would only work for the first sensor in the list, not for all sensors that you selected via multi-edit.
Notifications	We fixed an issue for sms notifications that were cut off in the text when you used certain special characters, like for example ampersand &.
Notification trigger	We fixed an issue for notification triggers, that is Speed, Volume and Threshold trigger where added values in the PRTG web UI would not be saved correctly in certain cases. It could happen that after you have entered for example a valid value for bit/second in the Speed trigger under Notification Triggers, that the value was saved afterwards with 0 or even an invalid float value. We also fixed this issue for the PRTG App for desktop.
Remote probes	We fixed an issue where not all probe Settings were displayed in the previous PRTG versions when you installed a new remote probe on your system. When you have added a remote probe successfully and opened the probe Settings tab you could see that, for example, the Credentials for Cisco Meraki were missing.

Fixed

PRTG App for Desktop

Access rights	You can now acknowledge alarms with your read-only user in the PRTG App for Desktop when you have set the according rights for that user in the PRTG web interface before. Previously, when you have created a read-only user in PRTG and afterwards added additional rights Allow user to acknowledge alarms to that user, the settings would not automatically be updated when the user was logged in to the PRTG App for Desktop. As a workaround, you had to restart the Core server or the user had to log in to PRTG App for Desktop again.
Auto-Discovery	We fixed an issue where the execution of an auto-discovery with device template on the PRTG App for Desktop produced an access denied message in the CoreWebServer.log.
Proxy server	You can now use Probe Transfer and Configuration Viewer in the PRTG App for Desktop when you have configured a proxy server under Probe Connection Settings in your PRTG installation. In the previous PRTG versions, the remote probe would not connect to the server if you enabled the Probe Transfer feature and if you had a proxy server configured on your PRTG installation. The beta feature Template Transfer for custom device templates from one PRTG server to another will now work as well with a configured proxy server.

Note

Known Issues

PRTG application server

Currently it is not possible to install or uninstall the PRTG application server via button Install Service or Uninstall Service in the PRTG Administration Tool. The PRTG Administration Tool will execute a Core server restart but the PRTG application server will not be installed or uninstalled afterwards. To install the PRTG application server and make use of the new UI and APIv2, please see our Knowledge Base article: I want to use the new UI and API v2. What do I need to know?

PRTG Administration Tool

You will receive an error when you click on the button Stop Service or Start Service (ignore changed settings) for the Core and Probe service in the PRTG Administration Tool when you run it as a 64bit version on your system. The PRTG Administration Tool will then report the following: One or more required program components of PRTG (PRTG Server.exe, PRTG Probe.exe) could not be found! Please re-run the installation program. This issues does not occur when you run the PRTG Administration Tool in a 32bit mode. We will deliver a fix for this issue with the upcoming PRTG versions.

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 24.2.94.1400

sha256_exe CBC38F35BC3B4F557FE90EE9EAEEC8E1E66D852713A947119D477844D7E0E7D8
sha256_zip 483CD024BD41BF522292A52C65EB09316518030455362423FC60EFC59354C3F5

Lab

New UI

Device settings

You can now configure and manage your Credentials for Windows Systems in the device settings in the new UI and also via API v2. This enables you to use sensors on your device which require windows authentication, like WMI sensors. The available fields are Domain or Computer Name, User Name and Password. You can also see and manage the Inherit From toggle and enable or disable it. The windows credentials will also be visible in the new UI when you set them via APIv2 PATCH request on the endpoint /api/v2/devices/{id}. Additionally you are now able to edit the following device settings in the new UI and APIv2: Credentials for VMware/XenServer, Credentials for AWS, Credentials for Script Sensors, Advanced Network Analysis.

Mobile view

We improved the navigation in the mobile view for the new UI. When you click on the menu icon it opens a drawer from the left hand side. The drawer remains open during navigation and you can close it with the x button. Additionally, when you select home in the side bar, you will see links to the sections Welcome and Quickstart.

Lab

PRTG API v2

API

We fixed an issue where it was possible to pause a user via the endpoint api/v2/users/ID/pause. The user was successfully paused and was no longer able to log in. This issue did not affect the old APIv1.
We fixed an issue where the status info of a device was displayed when you have paused it before and now resumed it via POST request devices/id/resume. The status info would then display status:UP when you executed a GET request on devices/id. The status info will now only be displayed when you have paused a device.
The PATCH and POST endpoints can now handle incoming setting lookup values. For example, for the POST endpoint experimental/groups/{id}/device you can now send the discoverytypegroup for a device template.
We fixed an issue where executing the request via endpoint GET users/{userId}/api-keys resulted in a not found error message when you used a newly created API key that you created before in the PRTG classic web interface.
We fixed an issue for the devices/{id} endpoint where executing a PATCH request to rename a device was only changed in the basic section.

PRTG application server

We fixed an issue for the PRTG application server that ran into panic mode when you ran a mini probe on your PRTG installation, for example a Python Mini Probe or a PRTG Mobile Probe for Android. The created panic log would display the error panic: runtime error: invalid memory address or nil pointer dereference in these cases.

Improved

Various

All parts of PRTG	Various other minor fixes and improvements, updated user manual.
Languages	We updated the German and Spanish language files.
Sensor languages	We updated the Spanish language files for certain selected sensor types.

February 14th 2024 - Version 24.1.92.1554

Blog article

By Michael Becker • Mar 1, 2024

PRTG release 24.1.92 is available in the stable release channel!

The latest version of Paessler PRTG, 24.1.92, is now available through the stable release channel! This version comes with several new sensor types that are now fully supported (like the Ping v2...
Read the complete blog post here

New

Sensors

Cisco Meraki sensors	The Cisco Meraki License sensor monitors Meraki licenses of an organization and the Cisco Meraki Network Health sensor monitors the health of Cisco Meraki network devices. Both sensor types use the Cisco Meraki Dashboard API. We released these sensor types as experimental sensors with PRTG version 22.1.74.1869.
FortiGate VPN Overview sensor	This sensor monitors VPN connections of your Fortinet FortiGate firewall. The sensor shows the number of connected SSL clients, as well as the number of both up and down IPsec tunnels. We released this sensor type as experimental sensor with PRTG version 22.1.74.1869.
HTTP v2 sensor	This sensor allows you to send a HTTP request (HEAD, GET or POST) and use placeholders, similar to the REST Custom v2 sensor. We released this sensor type as experimental sensor with PRTG version 22.4.81.1532.
Local Folder sensor	The Local Folder sensor monitors a local folder on a probe system. We released this sensor type as experimental sensor with PRTG version 21.3.70.1629.
Network Share sensor	The Network Share sensor monitor a Server Message Block (SMB) or Common Internet File System (CIFS) network share. We released this sensor type as experimental sensor with PRTG version 21.4.73.1656.
Ping v2 sensor	The Ping v2 sensor comes with a new setting Inverted Error Status different to its predecessor. If you select Enable for this new setting, the sensor shows a Down status if the target device is reachable. The Ping v2 sensor supports IPv6. We released this sensor type as experimental sensor with PRTG version 22.4.81.1532.
Redfish Virtual Disk sensor	his sensor monitors the virtual disks of your Redfish capable servers and shows capacity and status. We introduced this sensor type as experimental sensor with PRTG version 21.3.71.1416.
SNMP Uptime v2	This sensor type comes with the same basic settings as the already existing SNMP System Uptime sensor including the additional Data Source setting under the section SNMP Uptime Specific, where you can select the object identifier (OID) the sensor gets its uptime from. The Data source is also depicted in the sensor status. We released this sensor type as experimental sensor with PRTG version 23.2.84.1566.
Soffico Orchestra Scenario sensor	This sensor monitors the status of processes within an Orchestra scenario. Please note that this sensor requires a Soffico license and as of Orchestra 4.8.2.5. We released this sensor type as experimental sensor with PRTG version 23.4.90.1299.

Improved

Security

API Keys	We improved the creation of API keys via API call requests to match the given access rights. Previously, it was possible to create an API key for a read/write user with the parameter accesslevel_new=full via GET request, although the user only has write access at the most according to the API key access rights settings. The Access Level for the created API key then wrongly displayed full access.
Web interface	We fixed an issue where an authenticated attacker could craft a specific request against the editlicense.htm endpoint and change the license of PRTG partially affecting the availability of PRTG. The severity is 4.3-Medium and calculated as CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
Webserver	We fixed a reflected XSS vulnerability which allowed JavaScript injection. The severity is 6.1-Medium and calculated as CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Improved

Server

Notifications	We added the option for SNMP Trap notifications to include the sensor ID that triggers the notification in the trap message. If you select the option Include sensor ID in the Send SNMP Trap notification template, PRTG will send it on the OID 1.3.6.1.4.1.32446.1.1.5. Previously, parsing the sent trap messages was not possible for certain third party systems due to the missing option.
Update to OpenSSL 1.1.1w	To ensure secure communication furthermore we updated to the OpenSSL version 1.1.1w.

Fixed

Server

Contact Support	You can now send support bundles with the Contact Support option when you have configured a proxy server in the PRTG Core & Probes settings. Important: The issue still appears in the Paessler PRTG app for desktop.
Change Password	You will now receive a proper error message Error (Bad Request) again when you enter an invalid (old) password under My Account in your Account Settings. In the previous PRTG version there was a log entry in the Core webserver log Error: The validation of the data you entered has failed, but no corresponding error message in the web interface. The issue occurred when you selected the option Specify a new password and entered an invalid Old password.
Device List	We fixed an issue that caused the inheritance to be disabled for all settings of a device if you changed settings in the Device List before. The issue occurred when you selected several devices in the Device List via Settings option in the multi-edit and saved the changes. The settings of the devices where you made the changes for were set to disabled in the Inherit From toggle.
Historic Data reports	We fixed an issue for historic data reports that displayed not all or additional hours in the Date Time table when the user has set a different time zone under My Account in the PRTG Web Interface. For example, when your time zone in your account was set to (UTC -6:00) and you ran a historic data report for 12 hours, the report would in this case substract the hours in the Date Time table from the UTC time zone set under your account..
Libraries	We fixed an issue for an unauthorized Ajax error that occurred in certain cases in the CoreWebServer.log instead of displaying the correct error message Your user account is not allowed to access this information. The issue happened when you were logged in with a user account whose assigned user group has write permissions on a library but who is not allowed to access user information when you clicked on the Security Context link for the user to see the User Account Settings.
Lookups	We fixed an issue for lookup files where changes were not reflected in the web interface when you changed values in lookup files after OID library creation. Changes to lookup values were only displayed after a complete PRTG core server restart. The issue affected for example the SNMP Library sensor, but also other sensors that come with value lookups and appeared only for the first modification in the lookup file.
Maps	We fixed an issue for public maps where the map access failed with the error message Map refresh failed in certain cases. The issue occurred for read-only users that had Read Access to a public map in the according PRTG User Group but different security contexts, for example No Access, for objects in a public map. Public maps are now displayed for read-only users but only show the objects the read-only users have access to according to the security context. You can again change the background image of a Map in the Map Settings. If you changed the background image of your map and saved the changes, the map would still display the old image as the new one was saved under an incorrect map ID in the previous PRTG version.
PRTG Installer	We fixed an issue where PRTG stored the data for the Installation Path in the same folder as for the Data Path when you selected to run the PRTG installer in the Custom mode for fresh installations since PRTG version 23.3.88. The issue happened when you changed the Data Path directory in the path field directly.
Remote Probes	Your remote probes that you have deleted from the device tree will no longer appear on your PRTG Status Page under the Probes and Database Objects sections, or in the information returned when you execute a query on PRTG Health System Information via an API call /api/health.json?. In the previous PRTG version, a deleted remote probe would still be displayed on the mentioned sections with the status disconnected.
Reports	You can now sent reports by email again for scheduled reports in the Report Schedule setting. Previously, when the report schedule sent out an email to a configured email address or PRTG user group you would receive an access violation in the Core.log and in certain cases also the message Error sending Report Email. The issue occurred if you selected a schedule for a report in the Report Schedule setting with Target Email Address and/or Email to User Group.
Scanning Interval	We fixed an issue where you could not save your Scanning Intervals in certain cases when you used a regular interval and a UTC interval with the same unit. For example, if you entered 4h and @UTC 4:00 at the same time in the Available Intervals section you would receive a validation error upon saving your changes.

Fixed

Sensors

Add sensor	We fixed an issue for certain sensors on addsensor.htm that could be added although the device or group to which you want to add these sensor types did not have corresponding credentials. When you tried to add an AWS sensor, for example, to a device without Credentials for AWS, you received an error message Sorry, the scan for available monitoring items has failed! The AWS sensors will now be displayed as inactive on addsensor.htm with a hint that valid credentials are needed when you try to add them to a device without Credentials for AWS. This issue was also fixed for the Local Folder sensor (BETA) and the Network Share sensor (BETA).
AWS sensor	We fixed an issue that caused the environment variable AWS_EC2_METADATA_DISABLED to be leaked into the environment of other sensors. For example, it did not work in cases when you had PRTG installed on an AWS environment and ran a script with a Python Script sensor that pulled credentials from an API although the role on AWS allowed PRTG to authenticate with an AWS SDK. The environmental variable was set to AWS_EC2_METADATA_DISABLED=TRUE in this case.
AWS RDS v2 sensor	Your AWS RDS v2 sensors now display the correct values for the channel Database Connections again. The sensors displayed a wrong amount of connections in the mentioned channel with PRTG stable version 23.4.90.1299 since the sensors pulled the metric for 'SUM' and not 'AVG' (average) for Database Connections.
Veeam Backup Job Status Advanced sensor	Your Veeam Backup Job Status Advanced Sensor is now able to display the correct value for the channel Job Scheduled when the scheduled job has been disabled. The channel Job Scheduled will now display the value No where previously the channel would have displayed the value Yes. For more information please see our Knowledge Base article:https://kb.paessler.com/en/topic/89136 .

Fixed

WebUI

Device tree

We fixed an issue that occurred when you renamed a device or group via context menu in the device tree that contained Credentials for Microsoft 365. The error message was The validation of the data you entered has failed and settings could not be saved when you tried to rename the device or group with right click on edit and rename. The issue also occurred when you tried to edit the access rights in the device tree in these cases.

Historic Data Tooltip

We fixed an issue where a second tooltip icon with tooltip text was displayed in the section Percentile Handling in the Historic Data Tab of a sensor. You could observe this behavior when you selected the radio button for Show Percentiles. The second tooltip would be displayed for Percentile Averaging Interval.

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 24.1.92.1554

sha256_exe 4FBB44524659CBB03EB84B4A032B81B5042EA756C0CBC8581E77EBB278D758B8
sha256_zip 2C7B719939CCB1106AEE5B6C5715DC4ED80BE5E07A077FF076A5CC6D1EE7F08C

Lab

Multi-Platform Probe

Multi-Platform Probe 0.19.0 release

The Multi-Platform Probe enables you to deploy probes on platforms not supported by the Remote Probe, including various Linux distributions and ARM hardware. In this latest release, we provide TLS support, ensuring a secure and encrypted connection to the NATS server. Additionally, we've included a user-friendly setup wizard for the NATS server, streamlining the installation and configuration process.

For more information about the Multi-Platform Probe please see our Knowledge Base article: What is the Multi-Platform Probe and how can I use it?

For detailed release notes please see our Knowledge Base article: What are the release notes for the Multi-Platform Probe?

Lab

Sensors

Redfish Virtual Disk Sensor	The Redfish Virtual Disk sensor (BETA) is now able to handle disks that have one of the following states: Enabled, StandbySpare, InTest, Starting, Quiesced, Updating and Qualified. Previously, the sensor could handle only the state Enabled and would display the status offline for all other states.
Script v2 sensor	We improved the security for the usage of Python scripts with the Script v2 sensor. All PYTHON* environment variables that might be set, like PYTHONPATH or PYTHONHOME, will be ignored when you execute scripts with the Script v2 sensor by using the parameter -E. This parameter prevents that a different e.g. PYTHONPATH is set and that Python scripts with potential security issues are run in the Python script directory.
SNMP Uptime v2	We fixed an issue for the SNMP Uptime v2 (BETA) sensor that displayed wrong values in the Live Data section of the sensor in the System Uptime channel. The issue occurred when you added the sensor to your PRTG local probe, however, it displayed the correct values when you have added it to your Multi-Platform Probe.

Lab

PRTG API v2

API	We fixed an issue where only one device template was returned in the settings even if there were multiple device templates for auto-discovery assigned to a device when you executed a GET request with /api/v2/experimental/devices/{id}/settings. This issue also affected the former APIv1 via /api/getobjectproperty.htm. We fixed an issue that occurred when you sent a PATCH request to /devices/{id} endpoint in order to set the IPv4 host of a device. If you sent a GET request to /devices/{id} in order to check if basic.host is set to 127.0.0.1, you would notice that the host option was not set correctly. The issue happened when you created a device in the classic web interface in PRTG before with the IPv6 Hostname set without the IPv4 or a IPv4 Hostname given. We made several changes for the experimental endpoint. We added the sortIndex field and sections and settings are not sorted anymore by the appserver. Default values like false for boolean or empty strings are omitted in the response. Fields for read only users are now masked in the endpoints /devices/{id}/settings and /devices/{id}, for example the Credentials for Windows systems. In the previous PRTG version, those setting fields were not masked when you logged in with a read only user to the appserver and executed a GET request on a device with all settings included. We fixed an issue where the parent tag of a device was not returned when you executed a GET request for the api/v2/devices endpoint. For example, if you added a tag to a specific group to which the device was added and requested the device details via endpoint afterwards, the parent tag for that device was not returned in the response. We fixed an issue for the Create Device endpoint /api/v2/schemas/device?purpose=create&parent=1 that resulted in 404 NOT FOUND error although the API call was on a valid schema. You can now update the inherited value for Credentials for Windows Systems under device Settings with an according PATCH request for the devices/{id} endpoint. We fixed an issue where executing a GET request resulted in a not found error message when you used a newly created API key that you created before in the PRTG classic web interface. When you executed a GET request, for example, via /devices/{id} endpoint and authorized with a newly created API key first, the response would be not found on the first try. The second execution of the request would then be successful.
Devices	You can now create a device under a group or local probe via API v2. You can create a device by sending the according POST request on the endpoint experimental/groups/{id}/device in the Swagger UI. The device will be created on group level. For a device on probe level you need to use the endpoint experimental/probes/{id}/device. Read-only users are now able to see information of the Credentials for Windows Systems settings of a device via the /devices/{id} endpoint. The available information is if the Inherit From toggle is activated or not and where the data is inherited from.
PRTG application server	We fixed an issue for the PRTG application server that in certain cases reported a 503 License Invalid error when you performed a GET request, e.g. GET /api/v2/devices with an according API key. The issue occurred when the PRTG application server was not connected to the PRTG core server. We fixed an issue where the PRTG application server stopped working in certain cases. You could observe that the PRTG application server created a panic.log with the following error message panic: runtime error: invalid memory address or nil pointer dereference in these cases.
Security	We fixed an issue where it was possible to escalate privileges for API-Keys.

Lab

New UI

Web interface

Automatic Logout: You will now be logged out automatically after a certain period of time in the new UI when you have activated the setting for Automatic Logout in the classic web interface. In the previous PRTG version you received an unknown error for the automatic logout process in the new UI and also the Stay logged in button did not work. You will now also receive a proper message on the login page when you were logged out automatically: You have been logged out due to inactivity.
Color mode: We fixed an issue where the Color Mode (Light or Dark mode) selected by a user under My Account was not applied when the user logged in to PRTG.
Delete device: You will now see a proper dialogue displayed when you delete a device via context menu. We improved the text to The object including all subobjects will be deleted. There is no way to undo this operation. The dialogue also displays the subobjects that will be deleted with that action.
Device icon: You can now change the device icon for your device in the settings for Additional Device Information. A selection of device icons opens when you click on Select Device Icon.
Page refresh: You can now manually reload a page within PRTG with the refresh button in the footer. The refresh timer will then start again from the beginning. You can also pause and resume the page refresh with the button in the footer.
Monitoring: We added an alternative Sunburst view to display and navigate monitoring objects on the left side of the split screen. You can change the display of your monitored objects in the View Settings and switch now between Tree and Sunburst view.
Split view: We improved the horizontal space in the split view to use space more effectively for subpages with narrow content (Device List, Info, Settings, Graphs).
User rights: Read-only users are now able to see the Credentials for Windows Systems in the device settings. You will see the information in the Inherit From toggle where the credentials are inherited from when you are logged in as a read-only user. The credentials for Domain or Computer Name, User Name and Password are masked.
We fixed an issue where redirects from the classic web interface led to application errors because the wrong endpoint was called when you clicked on the Open New UI button in certain cases.
You can now manage the inheritance feature toggle on the device Settings tab under Credentials for Windows Systems. When the inheritance toggle is enabled, the active values of the inheritance source are displayed and otherwise, when disabled, the active values of the device are shown. Please note that it is not possible to change the field values yet at the current implementation status.

Mobile view

We introduced a new header for PRTG in mobile view where the menu is positioned on the top left side. The parent breadcrumb will be displayed on the top right side. The main page title Home was removed.

Improved

Various

All parts of PRTG	Various other minor fixes and improvements, updated user manual.
Languages	We updated the German and Spanish language files.
Sensor Languages	We updated the German and Spanish language files for certain selected sensor types.

January 10th 2024 - Version 24.1.90.1306

Important

Security

Webserver Security

CVE-2023-51630 - ZDI-CAN-21182: An XSS vulnerability was identified through the htmclass parameter in the error.htm in PRTG 23.4.90.1299 and earlier versions where an attacker could bypass the authentication by creating a malicious link and luring a PRTG user with an active session to click it. The severity of this vulnerability is high and received a score of 8.8, (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H). For further information, please refer to ZDI-24-073 and CVE-2023-51630

We would like to thank n1nj4sec for working with Trend Micro Zero Day Initiative and responsibly reporting this vulnerability.

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 24.1.90.1306

sha256_exe 8A7FC26DA34FB760FB611D3BB67511AF41319492C1E9F8D36F6815BA8405BC9F
sha256_zip 5342671E0961E2DB67A2A2DD9C2BE89F4A3EC8D3BDE857827F2334D49D59AFD3

November 15th 2023 - Version 23.4.90.1299

Blog article

By Michael Becker • Dec 4, 2023

PRTG release 23.4.90 is available in the stable channel

The most recent version of Paessler PRTG, 23.4.90, is now accessible through the stable release channel! This version comes with the experimental Soffico Orchestra Scenario sensor, supported proxy...
Read the complete blog post here

New

PRTG Data Exporter 2023.11.9.1

General

Major application rework with the newest .NET technologies
Considerable performance improvements for both UI and data collector
PRTG servers can now be registered using either credentials or API key
Security changes (data encryption, DB connection string storage, and encryption)
New tools app for changing the connection string
Improved logging

UI

Filters page

Layout changes (now similar to SLA Reporter)
PRTG tree is now lazy-loaded for improved page performance
Multiple PRTG cores can now be assigned to the same filter

Data Collection page

Data collection can now be visualized on a page instead of a modal window
Improved visualization of the progress
You can now select profiles and set date range parameters

Profile Activity page

Now displays errors/warnings that occurred during the PRTG data collection

Dashboard page

Displays the total number of collections as well as failed and successful collections
Displays information regarding the last collection for each profile
Displays a chart with the total collected data for the last 7 days for each profile

New

PRTG Database Observer 1.60

General

Small bug fixes and changes

New

PRTG SLA Reporter 3.40

General	PRTG servers can now be registered using either credentials or API key Security changes (data encryption, DB connection string storage, and encryption) New tools app for changing the connection string Small bug fixes and changes
PDF Reports	Overlay and style changes Now uses HTML template files which can be customized by the user Company and contact information can now be defined and it will be displayed on the first page Additional options added for customizing the data displayed in the report
Planned Downtimes	Can now be defined by selecting filters, SLAs, and/or individual sensors
Polling Task	New setting added that can be used to enable debug logging
Reporting	Fixed an issue where the SLA/sensor report uptime would contain a negative value fixed an issue with overlapping intervals (planned overlapping unplanned/unknown)
UI	Fixed an issue with the Users page filters getting reset on submit Fixed an issue with the device alias not being displayed in the PRTG tree Changes to the sensor report timeline charts (visual changes, more data displayed) Forms validation fixes
Scheduled Reports	Fixed an issue where the emails would not be sent in some situations Increased the character size for the email addresses field

New

ITOps Board 3.13

Improvements and Fixes

ITOps Board version 3.13 comes with accessibility enhancements. In this release, the Explorer tab has been updated for accessibility and now includes text labels to indicate the health state of each component. Additionally this release introduces the use of icons to indicate the health state of components and alerts. It also covers fixed issues. For more information please refer to the release notes provided with the new version.

Important Notice: Upgrade Process. The ITOps Board installer supports an in-place upgrade. If you made manual changes to the web.config file, those changes are not preserved during an in-place upgrade. Any manual changes to the web.config file are saved in a file with a name that uses the following format: Web-YYYY-MM-DD.config. Before you begin an upgrade, save a copy of this file. It is recommended that you use the file as reference to make changes to the new web.config file, which will overwrite the previous file during the upgrade process. Do not overwrite the new web.config file with the old file.
This release of ITOps Board requires Elasticsearch version 7.17.6.

Improved

Security

Forgot Password

The reset token in the link for setting a new password is now masked in the CoreWebServer.log. It was logged in a readable format before when you clicked on the link for setting a new password with the forgot password option.

Improved

Sensors

Exchange Database DAG (PowerShell) sensor	Your Exchange Database DAG (PowerShell) sensor now recognizes newer versions of Exchange Server (>2019) and can distinguish between versions i.e 2010, 2013, 2016 and 2019. Previously the sensor recognized the Exchange Server 2019 version as an older version and tried to use this information, resulting in a Warning status for the Active Copy Channel with the message Could Not Read Activation Preference.
EXE sensors	We updated our database connectors for certain EXE sensor types, e.g. Oracle SQL v2 sensor, MySQL v2 sensor and PostgreSQL sensor. Previously, the connection to the corresponding databases failed due to required encryption ciphers that did not match.
Microsoft Azure sensors	You can now add the following sensor types to your device template when you select the function Create Device Template in the device tree: Microsoft Azure SQL Database sensor, Microsoft Azure Subscription Cost sensor, Microsoft Azure Virtual Machine sensor and Microsoft Azure Storage Account sensor. This enables you to create these sensors afterwards with the option Run Auto-Discovery with Template. Please note that these sensor types require an Azure custom role with specific permissions. For more information please see our Knowledge Base article: https://kb.paessler.com/en/topic/88625. We generally hardened the approach how Microsoft Azure sensors retrieve data to avoid gaps in the sensor data.
OPC UA Custom sensor	Your OPC UA Custom sensor now supports more data types, that means enums and single values from array-valued variables. Previously, the sensor supported only string, Boolean, and numeric variables.
Proxy Settings	We improved the following sensor types to support the Proxy Settings in the device settings so they are able to use a HTTP proxy server when you have set up one in the device settings: AWS v2 sensors Cisco Meraki (BETA) sensors Cloud HTTP v2 sensors Cloud Ping v2 sensors Dell EMC sensors FortiGate sensors HPE 3PAR Common Provisioning Group HPE 3PAR Virtual Volume HTTP v2 (BETA) sensors Microsoft 365 Microsoft Azure NetApp sensors Redfish sensors REST Custom v2 (BETA) sensors Soffico Orchestra sensors Veeam sensors Zoom Service Status sensor
Soffico Orchestra sensors	You can now create device templates that include the sensor types Soffico Orchestra Channel Health sensor and Soffico Orchestra Scenario sensor (BETA). This enables you to add these sensors via auto-discovery.

Changed

Sensors

MySQL v2	With this PRTG version the MySQL v2 sensor does not support the integrated Windows authentication for MySQL anymore due to a license change in the database connector. The sensor will request the Windows password and username instead.
Windows IIS 6.0 SMTP Received, Windows IIS 6.0 SMTP Sent	We renamed the sensor types Windows IIS 6.0 SMTP Received sensor to Windows SMTP Service Received sensor and Windows IIS 6.0 SMTP Sent sensor to Windows SMTP Service Sent sensor to meet the technical requirements.

Fixed

Server

Access rights	We fixed an issue that affected the creation of Reports, Notification Templates and Schedules when you were logged in as a user with read/write access. When you were logged in as a read/write user, you would get an Unauthorized ajax error when you tried to create a Report, Notification Template or Schedule. However, the creation was successful in the background and visible to PRTG users with administrative rights afterwards.
API Keys	We fixed an issue where the created API key for an active directory user was still valid for a certain period of time even though the active directory user was deleted. Previously, when you created a new user in your active directory and connected it with your PRTG installation and also created an API key for this user, the API key would still be valid for a while even the login credentials were not when you deleted the user afterwards. The API key is now promptly invalid like the credentials when you delete the user from your active directory.
Map rotation	Public map rotation is now working again as expected. Previously, if you used the public map rotation feature without login credentials required, only the first map would be displayed or the other maps would be displayed as blank pages instead.
Reports	You can now create Historic Data Reports in the Historic Data tab for sensors as .csv file format again with the setting for show percentiles activated. Previously, the historic data report would run into an Ajax Error: timeout when you selected the format .csv file and additionally selected the radio button for show percentiles.
Scanning Interval	We fixed an issue for certain selected sensor types that caused the previously set scan interval to be ignored and always run for the default value of 60 seconds. In addition, the interval information was not added to the sensor log in cases where the Store result option was enabled under Debug Options in the sensor settings.

Fixed

Sensors

AWS sensors	We implemented various improvements for the AWS v2 sensors: You can add the AWS Alarm v2, AWS RDS v2, and AWS ELB v2 sensors again as expected even if services in a region cannot be accessed. In rare cases the sensor failed with the error message You are not authorized to perform this operation. We fixed an issue for AWS sensors that could not be created when you ran an auto-discovery via device template. Adding the sensors with auto-discovery now works again as expected. AWS EBS v2: We improved the wording of an error message text when the ID of the AWS EBS volume that this sensor monitors is not found. The error message displayed in the Down status of the sensor is No volume with the ID x was found.
EXE sensors	We fixed an issue for certain EXE sensor types, such as the ADO SQL v2 sensor, where the parsing for arguments failed when the Connection String in the Database Specific setting contained a linebreak. The sensor reported a down status with the message Invalid Authorization Specification in these cases.
Microsoft 365 Mailbox sensor	You can now again save changes in the sensor Settings of your M365 Mailbox sensor. This did not work before in the previous PRTG version 23.3.86.1520. Previously If you had changed the sensor settings and tried to save them, you would have received an Unauthorized ajax error message, the site page would have reloaded, and the settings would have reverted to the previous state. You could have saved the settings initially when you added this sensor type as new sensor during the creation process. We fixed an issue where you could not add the Microsoft 365 Mailbox sensor to your PRTG when it inherited credentials given under Credentials for Microsoft 365 from Root group. PRTG would report the following in this case PRTG Network Monitor has encountered a problem. Your last request could not be processed properly. You could also observe the following entry in the CoreWebServer.log: Error: The request cannot be processed because the object ID is missing.
MySQL v2	We fixed an issue for the MySQL v2 sensor where the executed SQLV2.exe client tool reported an error with the message Parameter -sslmode is missing. With PRTG version 21.2.68.1492 we introduced a dedicated setting for the SSL mode; however, this setting was initially only implemented for the Command Line Interface. The options you could choose are the same as the values of the MySQL sslmode parameter.
Netflow sensors	We fixed an issue for certain Flow sensors, like the NetFlow v9 sensor or IPFIX sensor, that led to access violations in certain cases when the data flow contained fields with variable length.
OPC UA Server Status sensor	We fixed an issue for the OPC UA Server Status sensor that reported the following error message in certain cases: The sensor could not connect to the OPC UA server (BadConnectionClosed). The issue occurred because the endpoint selection changed with an update of the library open62541 that is used by OPC UA.
SNMP HPE ProLiant Memory Controller sensor	We fixed an issue for the HPE ProLiant Memory Controller sensor that in some cases could not be created on a HPE ProLiant Gen10 server when the device type was 1 (other) in the given OIDs. An error with the message The sensor could not find any matching data on the monitored device occurred in these cases during sensor creation.
SMTP sensor	We fixed an issue for the SMTP sensors where the HELO ident that you configured in the Authentication setting of the sensor was ignored and instead e.g. the default hostname of the probe was used. This issue affected the SMTP sensor, SMTP&POP3 Round Trip sensor and the SMTP&IMAP Round Trip sensor.

Note

Paessler PRTG Enterprise Monitor

Offline activation

With this PRTG version we introduce a solution for offline installations of Paessler PRTG Enterprise Monitor that allows you to use a special Paessler PRTG Enterprise Monitor license for an offline system. You will be contacted by your Paessler Sales representative if this change applies to you.
For more information please see our Knowledge Base article https://kb.paessler.com/en/topic/91881.

Fixed

Paessler PRTG Enterprise Monitor

WebGUI footer

We fixed an issue where the footer on the PRTG web interface displayed Renew Maintenance when you had an active subscription license and when you were logged in with an account with administrative rights. The button Renew Maintenance appeared regardless of the maintenance days you had left. The footer now displays correctly the Contact Support button.

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 23.4.90.1299

sha256_exe F65CFEB47739935642DE9CA4E62F9CDA1E76D611766051D80FE3C6D3953F3195
sha256_zip 46BCD0BFD49AFD574A8DCF34310555C445521796F5DA4BF72BB01CA48E4AC68D

Lab

Sensors

Script v2 sensor	You can now create the Script v2 sensor (BETA) when you execute the Run Auto-Discovery with Template function on a device. The sensor will be created only when you have Python installed on the probe system.
SNMP Disk Free v2	We fixed an issue for the SNMP Disk Free v2 (BETA) that displayed wrong values in certain cases when you updated to PRTG version 23.3.88.1393. The issue occurred in cases when you monitored disks with a larger volume. The sensor then reported wrong values like 0% for the percentage channel Free Space and went into error status. Additionally, the absolute values in the channel Total were displayed as negative. The issue happened because the value calculation in the sensor was exceeded by the large values and the sensor could not handle the value overflow correctly.
SNMP Traffic v2 sensor	Your SNMP Traffic v2 sensor now includes the tag snmp in the default tags that are automatically predefined in the Basic Sensor Settings when you add the sensor.
Soffico Orchestra Scenario sensor	You can try out our experimental Soffico Orchestra Scenario sensor that we introduce with this PRTG version. This sensor monitors the status of processes within an Orchestra scenario. The sensor comes with the channels Aborted Count, Downtime, Finished Count, Paused Count, Running Count and Warning Count. Please note that this sensor requires a Soffico license and as of Orchestra 4.8.2.5.
Local Folder sensor and Network Share sensor	You can now add the sensor types Local Folder Sensor (BETA) and Network Share Sensor (BETA) to your device template when you select the function Create Device Template in the device tree. This enables you to create these sensors afterwards with the option Run Auto-Discovery with Template.

Lab

PRTG API v2

API v2

We added a new parameter purpose to the /schemas/{kind} endpoint that supports the values create (for POST), update (for PATCH) or read (for a GET endpoint). The endpoint returns the appropriate schema for a given purpose.

PRTG application server

The PRTG application server now calculates inheritance information of a device only in cases when the information is needed to avoid unnecessary CPU cycles. This applies when you request device settings via GET request /devices/ID/settings.
We fixed an issue where the PRTG application server service crashed in certain cases what led to the Core.log growing exponentially with log messages ctorConnectionOutgoingThread.Execute message not sent through TPaeTalkProtocolBuffersServerTCP. A short-term workaround was to reboot your system. The issue happened mostly for larger installations and was due to a TLS connection timeout.

Lab

New UI

Channels	We fixed an issue for the Last Value column in the new UI that displayed 0% as difference value. The Last Value column now no longer show a difference value of '0' in the sensor channel list when the value is 0% as difference between Warning Limit and Last Value.
Device Settings	The option to edit the IPv4 Address/DNS Name and IPv6 Address/DNS Name in the Device setting for the Probe device is no longer displayed. You can now see the parent Tags via the Parents Tags field that this device inherits from its Parent Group and Parent Probe, which are displayed in the Device Settings You can now add and remove custom and existing Tags via the Tags field under the Device Settings. You can confirm each tag with the Spacebar key, a comma, or the Enter key. You can now select a device icon for your device via the Select Device Icon field in the Additional Device Information section. Please note that for the moment the icon change is not reflected in the device tree. When you edit a section in the Device Settings and save your changes the sections will retain their expanded or closed behavior after you click Save Changes. You can now search for device tags by adding the tag you want to search for, to the search field in the Device Settings tab. You can now delete a device from the context menu. A device can be deleted from the context menu by clicking the option Delete Object of a device tree, a device list, a device header or the Action Button. Before deleting a device, a confirmation dialogue allows you to cancel or confirm the deletion.
Maps	We fixed an issue that occurred when you deleted devices that were included in a map. Previously after you deleted devices in the new UI that were included in a publicly accessible map you would receive the warning message Monitoring might be incomplete or inaccurate due to fundamental problems in your PRTG installation! Click here for more information! when you opened the map then in the classic UI. In addition, the Core Health sensor displayed a down status with the error message Free Physical memory is below error limit of x in Free Physical Memory. The public access page for the map was also not accessible and reported the error Map Refresh Failed in these cases.
URL parameter	The URL will again reflect the sorting parameters e.g tables?sort_identifier=status&sort_direction=ASC when you sort by Status in the Channel list of a sensor. The URL will again reflect the sorting direction parameters e.g /devices?sort_direction=ASC{} when you sort a device list by clicking on the Toggle sort direction* button.

Improved

Various

All parts of PRTG	Various other minor fixes and improvements.
Manual	We have updated the manual to provide recommendations on how to handle PRTG configuration files in a secure manner, please see the updated manual sections Files and Subfolders in the PRTG Data Directory and Handling Configuration Files.
Languages	We updated the Chinese, French, German, Japanese, Portuguese, Russian and Spanish language files.
Sensor Languages	We updated the Chinese, German, French, Japanese, Portuguese, Russian and Dutch language files for certain selected sensor types.

October 16th 2023 - Version 23.4.88.1429

Blog article

By Michael Becker • Oct 25, 2023

New PRTG release 23.4.88 is available!

The latest Paessler PRTG release, 23.4.88, is now available in the stable release channel! This version comes with the experimental SNMP Traffic v2 sensor and improvements for the MQTT Subscribe...
Read the complete blog post here

Important

Security

Webserver

We fixed a path traversal vulnerability in the PRTG Webserver that could be leveraged without authentication. The vulnerability can be tracked under CVE-2023-45858.

More information will be available as part of a staged disclosure process, for updates please see our Knowledge Base article https://kb.paessler.com/en/topic/91880.

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 23.4.88.1429

sha256_exe 7C5A30892CCB773A708C6EBE7D50D84227CBC7A5642FF24B98EA941194D30268
sha256_zip 3D9902DFF7483D90ECC45B10628FA8A772121631EF43F01109C58D74B268783C

October 2nd 2023 - Version 23.3.88.1421

Fixed

Sensors

SNMP Disk Free

We fixed an issue for the SNMP Disk Free sensor that displayed wrong values in certain cases when you updated to PRTG version 23.3.88.1393. The issue occurred in cases when you monitored disks with a larger volume. The sensor then reported wrong values like 0% for the percentage channel Free Space and went into error status. Additionally, the absolute values in the channel Total were displayed as negative. The issue happened because the value calculation in the sensor was exceeded by the large values and the sensor could not handle the value overflow correctly.

Note: This issue still occurs for the SNMP Disk Free v2 (BETA) sensors that we released as experimental sensors with PRTG version 23.2.86.1520.

Fixed

Server

Maps	We fixed an issue that led to a higher memory consumption when you updated to the previous PRTG stable version 23.3.88.1393. The issue was caused by public map displays. You can also recognize an increased Sessions number in the PRTG Core Server System Memory on the setup page in this case.

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 23.3.88.1421

sha256_exe 81639398DEE35B3060F9E34653AF93FDC627F13FF696B355C4D19A462AAC644B
sha256_zip C419331F1680505137301DAEE8AAAAD2DA54126B8C3005A6ED4A367B7ABF301E

September 20th 2023 - Version 23.3.88.1393

Improved

Server

Security

Your API Keys are no longer logged in a readable format in the CoreWebServer.log when you have created an API key before and executed an API call request with it. The issue only occurred for the Log in Debug Level.

Improved

Sensors

AWS EC2 v2 and AWS RDS v2 sensors	Your AWS EC2 and AWS RDS v2 sensors will show a warning message if the limit of the channel CPU Credit Balance limit has less than 1 credit available. Previously the sensors were showing an error status. Please note that this change applies only when you add this sensor type as new sensor.
Microsoft 365 Mailbox sensor	You can now filter emails that match a defined regular expression. The new filter filters email whose Subject, From or Body fields match the defined regular expression. You can set the new option under the Microsoft 365 Settings. Important: The regular expressions filter will result in the Down status if there are more than 10,000 emails in the mailbox folder you want to monitor. This is because the regular expression filter is applied after the emails are retrieved from the API. The larger the volume of emails, the greater the impact on performance. Enable the Filter by Age setting or use a non-regular expression filter in addition to the regular expression filter to reduce the number of emails.
MQTT Subscribe Custom sensor	We added two new options in the MQTT Specific settings of the MQTT Subscribe Custom sensor for a better message handling. The option Add duration since last message will set a threshold alarm that will notify you when no message was received. Previously, the sensor went into unknown status before when no message was received in the scan interval. This default behavior will remain if the setting for Add duration since last message is not enabled. The option Retain last sensor value keeps the last message on the live charts and allows you to monitor specific JSON values of the payload.
SNMP Buffalo TS System Health Sensor	Your SNMP Buffalo TS System Health sensor is now able to display an additional status for the channel Firmware Update Available. Previously, the status was not included in the lookup file and therefore displayed an error with the message undefined lookup value (3) when the value 3 was sent to the sensor. The value 3 in this case represents the status latest.

Fixed

Server

Cluster Setup	We fixed an issue that caused the Failover node to become unreachable when you added a new contact to the Notification Contacts settings of the Master node.
Dependencies	We fixed an issue where dependent objects, like sensors and devices, were not paused if the configured master sensor went into error status due to exceeded limits. When you configured the sensor under Dependency Type as Master sensor for parent then the issue occurred in rare cases when the sensor was not saved to the device tree while the limit status changed. The issue only affected newly created sensors.
Error messages	PRTG shows the error dialog Error (Bad Request) in the web interface again when you attempt to save invalid changes to settings. Previously, the error description was not displayed. The page reloaded without any indication when you tried to save your changes with invalid settings. The error was only logged in CoreWebServer.log.
Libraries	You can now create libraries again when you are logged in as a user with read/write access. This did not work before in the previous PRTG version 23.3.86.1520 when you were logged in as a read/write user that has full access in the according user group. You would get an Unauthorized ajax error message for adding a new library before.
Notifications	We fixed an issue that prevented notification templates from being edited within the notification trigger tab. We fixed an issue for the notifications template Send Syslog Message where the message contained a wrong character (?) at the beginning, regardless of the format (ANSI, UTF-8) you selected before. We fixed an issue in the delivery of sms notifications that occurred in cases when you used NowSMS service as an sms endpoint for PRTG. The delivery of sms notifications was delayed in these cases in the previous PRTG version.
PRTG Administration Tool	You can now enter a folder path with a folder that contains ANSI-characters, like umlauts or accents, in the PRTG Core Server Tab of the PRTG Administration Tool. Please note that this change does not work for unicode characters, like the Cyrillic language. If you select a folder path that contains non-ANSI characters or if you enter a folder path name with such in the field for Local Storage of Data Files and Monitoring Database, then an according error message will be displayed.
PRTG Installer	During PRTG installation, when the license server is unreachable due to connection or license expiration issues, the following error message will be displayed: Either the license server is not available because you are offline, or you cannot use the current version of installer because your license has expired. Please check your connection or log into the Paessler shop, make sure your maintenance contract is active and restart the installer. Previously, the installation displayed an error with the message that the license is invalid or that maintenance has expired.
Probe connection	We fixed an issue where in certain cases the probe service stopped working and caused the probe to disconnect from the PRTG core server. The probe service then reported a high CPU usage in these cases and sometimes access violations were logged in the PRTG probe.log additionally. The issue was probably caused by the DNS v1 sensor that we declared as deprecated with PRTG version 21.3.69.1333 and which was replaced with its successor DNS v2 sensor. For more information about deprecated sensor types and their alternatives please see our Knowledge Base article: https://kb.paessler.com/en/topic/89505.
Remote probe update	We hardened the mechanism for the automatic update of remote probes in PRTG with this PRTG version. Previously, sometimes remote probes required a manual update after you auto-updated your PRTG server with a new version due to a connection issue. Please note that this change will take effect when you update from PRTG 23.3.88 to the following version, not immediately after updating to this PRTG version.
Scanning Interval	We fixed an issue in the Monitoring settings for the Scanning Intervals section. You can now enter multiple scanning intervals again with the format of Coordinated Universal Time (UTC) points, like @ UTC hh:mm , hh:mm. Previously intervals with the "@ UTC" format were treated as duplicates and the entries could not be saved. Please note that you have to enter different time periods in the scanning intervals when you add multiple intervals in the UTC format. Note:The input validation still incorrectly fails when you add a UTC at a full hour that is already set as hourly scanning interval. For example, @ UTC 06:00 fails to save when there is already a scanning interval with 6h while @ UTC 06:01 would work in this case.
Single Sign-on	We fixed an issue where in rare cases the execution of the button Test Single Sign-On Authorization Endpoint led to an access violation. This issue occurred only in very rare cases if your Application (Client) ID for loading the configuration contained a blank space at the end.
User groups	We fixed an issue for user groups that had the setting Allow user group members to create certain sensors only enabled. When you created a user group with the mentioned setting and did not select any sensor types in the list, then all the sensor types would be selected after a PRTG core server restart for this user group.

Fixed

Sensors

Add sensor	We fixed an issue for certain sensor types that ran into the error no available in the Specific settings of the sensor during sensor creation. The issue happened when a timeout value higher than 300 was set in the registry for the initial sensor scan when you added the sensor. Sensor types affected were Microsoft 365 Service Status Advanced, Veeam Backup Job Status Advanced sensor, for example.
Beckhoff IPC System Health sensor	The Beckhoff IPC System Health sensor now supports IPv6 as IP Version connection that you can configure in the Basic Device Settings under IP version of the monitored device. The sensor appeared under Sensor types that are not IPv6 compatible in the previous PRTG versions due to a missing compatibility flag in the sensor library.
Custom sensor channel names	We fixed an issue for custom sensor types, like the HTTP Push Data Advanced sensor, where channels were created as duplicate when there was a trailing whitespace behind the relevant channel name. The issue occurred after a PRTG core server restart. The whitespace was removed and since it did not match the previous channel name, the sensor would create a duplicate.
HL7 sensor	We fixed an issue for the HL7 sensor in the settings for Message Header where the Default message header was overwritten in certain cases. The issue happened when you entered data for the setting Override message header but you activated the radio button for Default message header afterwards. In those cases, the sensor always took the override parameters instead of the selected default headers from the script.
HTTP Push Data sensors	Your HTTP Push Data sensors will show again their values in the Last Value column of the channel list of the sensor as well as in the channel gauges of the sensor Overview tab. The Last Value column did not display any data before in the previous PRTG versions for the HTTP Push Data sensor, HTTP Push Data Advanced sensor and HTTP IoT Push Data Advanced sensor.
HTTP sensors	We fixed the handling of HTTP methods that are returned after a redirect to follow the Post/Redirect/Get (PRG) pattern. This prevents the contents of the original POST to be resubmitted by redirecting the client to another location. If you select the Request Method POST, for example, under the HTTP Specific settings of the sensor, then the first request will use this method. If a request is redirected, all further requests will use GET. Redirects of requests that use GET and HEAD will continue to use GET and HEAD, respectively. This change affects all HTTP based sensor types, like the HTTP sensor and HTTP Advanced sensor.
Microsoft Azure sensors	Your Microsoft Azure sensors now query data in a slightly longer time span to make sure data is returned from Microsoft Azure and that every time stamp is considered. Previously, it could happen that Azure did not return any value when the queried time span was too close to the present as it would query only the most recent one and not also the latest data. Note: The Microsoft Azure SQL Database sensor will throw an exception in case no result is returned from timeseries. Microsoft Azure Storage Account and Microsoft Azure Virtual Machine sensors return default value = 0 in case no result is returned from timeseries.
NetApp I/O v2 sensor	We fixed an issue for the NetApp I/O v2 sensor that occurred with the ONTAP version update to 9.12.1P3. Due to changes in the API, the sensor received additional unexpected information which resulted in an error with the message The queried field "value" is empty for NetApp Cluster systems.
OPC UA sensors	We fixed an issue for OPC UA sensors that could run into a memory leak on the probe system causing the probe service to stop. The issue occurred only in certain cases when you ran a large number of OPC UA sensors, like OPC UA Certificate sensor, OPC UA custom sensor and OPC UA Server Status sensor with a short scan interval.
Redfish System Health sensor	We fixed an issue for the Redfish System Health sensor that in certain cases reported an error when the monitored device did not sent a Thermal service. The sensor ran into an exception and reported the error message No 'Thermal' service found in Redfish chassis. The channel for Thermal Status will now report the status Offline/Absent when there is no Thermal data sent by the monitored device. The channel for Thermal Status will not be created if the target system does not support this service determined with the first scan.
SSL sensors	We fixed an issue for the SSL Security Check sensor and SSL Certificate sensor that did not work anymore when a SOCKS proxy server for sensor connection was used in the previous PRTG versions. The sensors reported an error with the message The connection has dropped (PE039) in these cases.
SNMP Cisco System Health sensor	We fixed an issue for the SNMP Cisco System Health sensor that resulted in sensor logs that were written into the \Logs\sensors folder when you have selected the option Discard result in the Debug options of the sensor. The sensor kept overwriting the log files in this case when the store result option was disabled. Additionally, the sensor disabled the option Store result automatically after writing log files and reset it to Discard result. We also fixed this behavior so that you can now edit the options again manually.
SNMP Custom String sensor	We fixed an issue for the SNMP Custom String sensor where the parameter for the setting Interpret Result As was always set to the String (default) option, regardless of the option you set before. This issue occurred when the sensor was used in a device template.
SNMP Nutanix Hypervisor sensor	Your SNMP Nutanix Hypervisor sensor will display the speed in the column Last Value (speed) for Bytes Received when you update to this PRTG version. In the previous PRTG versions, the Last Value (speed) for Bytes Received was missing and had the unit Megabyte instead of Mbits configured.
SNMP sensors	Your SNMP Disk Free and SNMP Memory sensors now display valid values for monitored disks with a larger size >16 terabyte and memory storage >2 terabyte again. In the previous PRTG versions, these sensor types displayed random values or reported an error code 2003

Note

Known Issue

PRTG Installer

PRTG currently stores the data for the Installation Path in the same folder as for the Data Path when you select to run the PRTG installer in the Custom mode for fresh installations. This issue happens when you change the Data Path directory in the path field directly. We will deliver a fix for this issue in the upcoming PRTG versions.

As a workaround, please create a custom folder first if you do not want to install PRTG with the given default Data and Installation Paths. You can then select the folder location with the Browse button in the PRTG installer for the according path.

Solved with PRTG Stable version 24.1.92.1554

Fixed

PRTG Desktop

Cloning sensors	We have fixed an issue that prevented a sensor from being cloned to more than one device. The same issue would also occur if you tried to clone another sensor to another device after the first clone attempt. In both cases you would receive an error message stating Invalid operation. You can now clone a sensor (or different sensors) to more than one device.
Comments	We fixed an issue that prevented you from saving new or edit existing comments in the Comment tab of a device or a sensor.
Probe transfer	We fixed an issue where the transfer of your probes to another server may have failed in certain cases and resulted in a deadlock with the previous PRTG versions. With PRTG version 23.2.84.1566 we announced that you can find the Probe Transfer feature for PRTG Desktop under Probe Connection Settings in the PRTG setup and that it is no longer available in the Experimental Features section.

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 23.3.88.1393

sha256_exe FEBD43624FA423E18713245ACD4B612EAF29F5E5BCF02A91A1058D65157F60E5
sha256_zip 15455DB350CA3C4F7B1E2AB869C71CFAD643C2F5C90A304637A1B18EA0DC990B

Lab

Multi-Platform Probe

Beta release

The Multi-Platform Probe enables you to deploy probes on platforms not supported by the Remote Probe, including various Linux distributions and ARM hardware. We are happy to announce that the MPP has entered its Beta status with this release. This version brings improvements for various internal processes and includes the SNMP Traffic v2 sensor.

For more information about the Multi-Platform Probe please see our Knowledge Base article: What is the Multi-Platform Probe and how can I use it?

For detailed release notes please see our Knowledge Base article: What are the release notes for the Multi-Platform Probe?

Lab

PRTG API v2

Device settings	We fixed an issue where it was not possible to pause a device via API with /api/v2/devices/40/pause.
API Keys	You can now create, read, update and delete API-Keys with HTTP requests via PRTG API v2. For example, a POST request to users/{id}/api-key will create an API key with name, description and access level properties for the user. For more information about how to manage API keys in the API v2, check the Accounts section in your OpenAPI specification at {yourprtgserver}:1616/api/v2/oas/#/Accounts (HTTPS) or {yourprtgserver}:1615/api/v2/oas/#/Accounts (HTTP) .
PRTG application server	We fixed an issue for the PRTG application server that ran into panic mode during startup process in certain cases.

Lab

New UI

Device Settings	After searching for a value in the Filter Setting Sections the relevant to your search device setting sections remain expanded even after changing the respective search text value in your device settings. Collapsed Device Setting sections that contain invalid fields will expand when saving your changes. Setting sections that contain validation errors are no longer hidden when applying a filter to the device settings.
Device Tree	We fixed an issue that resulted in a missing cloned group in the new UI tree when you have cloned the group before in the classic UI and removed one device from the cloned group afterwards. Instead of only missing the deleted device in the new UI the whole group was gone in these cases.
Web Interface	We improved the navigation behavior of cards on the device and sensor overview pages.

Lab

Sensors

REST Custom v2	We improved the handling for JSON-path expressions in the REST Custom v2 sensor that in some cases could not be mapped if there were boolean strings with true and false. The mapping now works for counter and integer Value Type in the Channel Settings of the sensor with a given JSONPath/XPath. We fixed an issue for the channel setting Custom Unit in the REST Custom v2 sensor that was displayed even if you selected a different unit than custom. The field will now be displayed only when you have selected Custom (default) for the relevant channel as unit before.
SNMP Traffic v2	You can try out the experimental SNMP Traffic v2 sensor. The SNMP Traffic v2 sensor monitors bandwidth and traffic on a device via the Simple Network Management Protocol (SNMP). This sensor type has the same basic settings as its predecessor and comes with the additional channels Broadcasts In (number of incoming broadcast packets), Broadcasts Out (number of outgoing broadcast packets), Multicasts In (number of incoming multicast packets), and Multicasts Out (number of outgoing multicast packets). This sensor is not affected by the following SNMP compatibility options set in the parent device: Port Name Template, Port Name Update, Port Identification, Start Interface Index, and End Interface Index.
HTTP v2	We improved the handling of HTTP requests for the HTTP v2 (BETA) sensor to follow the Post/Redirect/Get (PRG) pattern.

Improved

Various

All parts of PRTG	Various other minor fixes and improvements.
Languages	We updated the German and Spanish language files.
Sensor Languages	We updated the Dutch, German and Spanish language files for certain selected sensor types.

July 25th 2023 – Version 23.3.86.1520

Blog article

By Michael Becker • Aug 14, 2023

New release! PRTG 23.3.86 is now available

Paessler PRTG 23.3.86 is now available in the stable release channel! The main focus of this release is to provide security fixes throughout PRTG. In addition, this release includes the...
Read the complete blog post here

New

ITOps Board 3.11

Improvements and Fixes

ITOps Board version 3.11 comes with improvements to accessibility on the boards page and context menu, as well as excluded child boards by default on display and improvements to integration settings.

It also covers fixed issues. For integrations that have a large number of components, an internal server error may have occurred in previous ITOps Board versions when you have performed a search. Also boards will no longer remain in maintenance mode when the scheduled maintenance period has ended.

Security Update: We updated the ITOps Board to version 3.11.4 to fix an issue in the remote agent installation file where the connection credentials were stored in a readable format and are now masked again.

Improved

Security

Vulnerabilities

We fixed a vulnerability where a PRTG user with write permissions could trick a few sensors into creating possibly executable files on the host system, which could then be executed under certain circumstances. The vulnerability can be tracked under CVE-2023-31448, CVE-2023-31449 and CVE-2023-31450.
We fixed a vulnerability where it was possible to bypass the CSRF protection. The vulnerability can be tracked under CVE-2023-31452.
We fixed a vulnerability where it was possible for a PRTG user with write permissions to trick certain sensors to use sensor specific files from unintended locations on the host system which could lead to arbitrary actions within the capabilities of the sensors. The vulnerability can be tracked under CVE-2023-32781 and CVE-2023-32782.
We fixed a vulnerability where a target url could be tricked to redirect the user to foreign domains.

For further information please also see our Knowledge Base article: https://kb.paessler.com/en/topic/91845

Improved

Sensors

Sensor Security

We fixed a vulnerability that could enable an authenticated and authorized malicious user to write an arbitrary file on the probe system. The issue affected the exe sensors FTP Server File Count sensor and HTTP XML/REST Value sensor. The vulnerabilities can be tracked under CVE-2023-22631 and CVE-2023-22632.

For further information please also see our Knowledge Base article: https://kb.paessler.com/en/topic/91756

Improved

Web server

Web server Security

We hardened PRTG against a possible Cross-Site Scripting (XSS) attack where a malicious actor could trick a victim into running injected javascript code over a manipulated link. Specifically, by using the bodyclass as a get parameter in conjunction with specifically encoded javascript, an attacker could trick a victim into running the injected code and disclose information to the attacker. Thanks to Nicolas Verdier for reporting the issue. The vulnerability can be tracked under CVE-2023-28148.

Fixed

Server

Forgot Password	Read-only users that do not have the permission to change their password will now receive an email again with the information Subject: Password Reset Failed: Please contact your PRTG administrator. Password Reset Failed: Not allowed. Read-only users without permission to change their password did not receive this email in the previous PRTG version before with the Forgot password? option on the PRTG login page.
PRTG Configuration file	Access keys for Probe and PRTG application server are now encrypted in the PRTG configuration file. The mentioned access keys were displayed in a readable format in the previous PRTG versions.
PRTG installer	The PRTG installer now validates the access to the selected Installation Path and Data Path on PRTG installation in the Custom mode and resets the path to its default when it is not accessible. Previously, the installation displayed a fatal error with the message PRTG Webserver could not be started properly when the installer failed to write into the path due to access restrictions.
Notifications	We fixed an issue for the HTTP notification type when it contained reserved special characters, such as hash symbols (#), in the placeholders of the URL which you can add in the Execute HTTP Action section. The URL string was cut off after the hash symbol in these cases.
Object naming	We fixed an issue on group, sensor, device and notifications level that led to several issues in the web interface when you entered an URL as name of the relevant object.

Fixed

Sensors

DNS v2 sensor	We fixed an issue for the DNS v2 sensor where the character escaping for curly brackets } in the Filter Value did not work properly. The sensor displayed the error message regex_error(error_brace): The expression contained mismatched { and }.
HL7 sensor	We fixed an issue for the HL7 sensor that went into error status with the message Error caused by lookup value 'No' in channel 'Message Control ID OK' (AE:102 Data type error) after running for a certain period of time. The issue was located in the current date and time of the timestamp.
HPE 3PAR	We fixed an issue that happened within the parsing of the output for the commands executed by the HPE 3PAR drive enclosure sensor. The sensor then reported the error message Invalid response structure encountered, some data is missing for HPE Primera systems in certain cases.
HTTP Advanced	Your HTTP Advanced sensors now can use custom headers again when you have defined them in the setting for Use Custom HTTP Headers of the sensor settings. Previously, the custom headers were ignored and overwritten with a default value. We therefore also fixed an issue with the default HTTP headers where the wrong response format, e.g. XML instead of JSON, was returned in certain cases.
Microsoft Azure Storage Account Sensor	We fixed an issue for the Microsoft Azure Storage Account sensor's channel, Used Capacity , which was previously recording 0 values. With this fix the sensor returns the average values.
NetApp SnapMirror v2	Your NetApp SnapMirror v2 sensor is now able to display a correct status for the channel Transfer Status when the reverse lookup value is insync for Snapmirror response protections. Previously, the sensor reported an error with the message The following reverse lookup value is invalid: insync. in this case.
NetFlow	We fixed an issue for the NetFlow v5 sensor where the values for Inbound and Outbound Interface were set to 16 bit instead of 32 bit in certain cases.
OPC UA Sensors	We fixed an issue for the OPC UA Certificate Sensor, OPC UA Custom Sensor and OPC UA Server Status Sensor that went into an error status after one or more scan intervals with the message BadSessionInvalid. The issue happened during session establishment where the session timeout response from the server was not taken into account by the sensor. You can now set the connection configuration for OPC UA to SecurityMode = None in the Endpoints tab with additional user name authentication via Username & Password for a user account. This combination did not work previously and the connection to the OPC UA sensors could not be established before. The OPC UA Server Status sensor now supports Client Keys with a 4096 bit length for OPC Client Certificates. In previous PRTG versions, the sensor reported an error when a private key with a length other than 2048 bits was used.
Veeam Backup Job Status and Veeam Backup Job Status Advanced sensor	We fixed an issue for the Veeam Backup Job Status and Veeam Backup Job Status Advanced sensor where the login on the Veeam Enterprise Manager failed with the message Enterprise Manager Login failed: 401: Unauthorized
Windows MSMQ Queue Length sensor	Your Windows MSMQ Queue Length sensors will now run again when you update to this PRTG version. These sensor types did not work anymore with PRTG version 23.1.82.2175 and reported an error with the message Queuename not found on specified machine in certain cases. The issue occurred on remote systems with a MSMQ service running that could not be queried.

Fixed

PRTG Mobile Apps

User Login

We fixed an issue where the login for non admin user accounts did not work anymore when PRTG was updated to version 23.2.84.1566. The issue occurred for both manual and QR code login. The workaround was to log in with an admin user account.

Note: This fixes also an issue for PRTG Desktop where non admin users were also not able to log in anymore with PRTG version 23.2.84.1566.

Note

Known Issue

PRTG Desktop Probe Transfer	The transfer of your probes to another server may fail in certain cases and will result in a deadlock. We are currently analyzing the issue. With PRTG version 23.2.84.1566 we announced that you can find the Probe Transfer feature for PRTG Desktop under Probe Connection Settings in the PRTG setup and that it is no longer available in the Experimental Features section. Solved with PRTG 23.3.88.1393
Libraries	You currently cannot add a library with a user account that has read/write access when you update to this PRTG version. When you are logged in as a read/write user that has full access in the according user group you will get an Unauthorized ajax error message for adding a new library. As a workaround, please use an admin user account instead. We will deliver a fix for this issue in the upcoming PRTG versions. Solved with PRTG 23.3.88.1393
Microsoft 365 Mailbox sensor	You currently cannot save changes in the sensor Settings of your M365 Mailbox sensor when you update to this PRTG version 23.3.86. If you change the sensor settings and try to save them, you will receive an Unauthorized ajax error message, the site page will reload, and the settings will revert to the previous state. You can save the settings initially when you add this sensor type as new sensor during the creation process. We will deliver a fix for this issue in the upcoming PRTG versions. Solved with PRTG 23.4.90.1299

Note

Installer

Security

You can verify the authenticity of the PRTG installer with the Secure Hash Algorithms for the following versions and release channels:

Stable 23.3.86.1520

sha256_exe D69D9F30092A351503A6404F01EB0C813F68DDCF8D2B8A057974C1513191BC09
sha256_zip D5B2FFAC3B6B973B035B5BEBADD20ABC5771E75B4290A45B65BBE7EC904385F5

Important: This PRTG stable version has the sequential build number 23.3.86. We published PRTG 23.3.85 only in the preview release channel due to a change in the release process.

Lab

Multi-Platform Probe

Second Alpha release

The Multi-Platform Probe enables you to deploy probes on platforms not supported by the Remote Probe, including various Linux distributions and ARM hardware. We are happy to announce that this version brings you the most recent sensors in a streamlined installation process, using Linux distributions package managers from Debian, Ubuntu, and RHEL/CentOS. This release adds the sensors HTTP v2, SNMP Disk Free v2, SNMP Custom v2, and SNMP Uptime v2.

With this release the focus is on expanding Linux compatibility. We removed Windows compatibility and will continue to explore supporting Windows. For Windows, please continue to use the remote probe.

Important: There have been significant changes in the installation, including changes to the file paths and the exposure of the service. If you already installed the Multi-Platform Probe in the past, then please remove your current installation before you install this release.

For more information about the Multi-Platform Probe please see our Knowledge Base article: What is the Multi-Platform Probe and how can I use it?

For detailed release notes please see our Knowledge Base article: What are the release notes for the Multi-Platform Probe?

Lab

Sensors

Cisco Meraki	We fixed an issue for the Cisco Meraki License Sensor and Cisco Meraki Network Health Sensor that went into an error status when PRTG was updated to version 23.2.84.1566 with the message The sensor could not get a response from the server. 0 (). schannel: next InitializeSecurityContext failed: SEC_E_ILLEGAL_MESSAGE (0x80090326) - This error usually occurs when a fatal SSL/TLS alert is received (e.g. handshake failed).
HTTP v2	We improved the HTTP v2 sensor to be more compliant with its predecessors HTTP and HTTP Advanced sensor concerning the redirect handling. The HTTP v2 sensor now comes with the new Setting Maximum number of Redirects that is by default set to 16. You can use a value of 0 if you do not want the sensor to follow any redirects. To make it more clear, we have renamed the setting from Timeout (sec.) to Timeout per Request (sec.) in the HTTP Specific settings of the sensor.
SNMP Disk Free v2	You can try out the experimental SNMP Disk Free v2 sensor that was rewritten to work on the Multi-Platform Probe. The SNMP Disk Free sensor monitors the free disk space on a logical disk via the Simple Network Management Protocol (SNMP). This sensor type has the same basic settings as its predecessor and comes with the channels Free Space (bytes), Free Space (%) and Total Space (bytes).
SNMP Uptime v2	We fixed an issue for the SNMP Uptime v2 sensor that reported the following error in certain cases: Could not resolve OID for 'iso.org.dod.internet.mgmt.mib-2.host.hrSystem.hrSystemUptime.0'. Either the required MIB file was not found or the name is invalid. The issue occurred only when you have added the sensor to a remote probe.
Script v2	We fixed an issue for the Script v2 sensor where the path to the Script folder was broken. The issue was fixed for the path on Microsoft Windows operating systems.

Lab

PRTG API v2

PRTG application server

We fixed an issue that prevented logging in after an automatic logout, for example after a timeout, logout in a different tab or when the PRTG application server was disconnected.

Lab

New UI

Device settings

Your device Settings are now divided in collapsible sections providing you a clear overview of the available settings.
You can now filter for items in the device Settings via an integrated search field. The matching results will be displayed expanded per section so that you can immediately change them.
You can now collapse and expand the settings sections with a toggle button. Basic Device Settings are expanded by default. When you have expanded all settings sections, the button will display close all and open all when the settings sections are collapsed.

Web Interface

We fixed an issue that led to an unknown error when you logged in to PRTG after a logout and when you navigated to Monitoring view via side menu.
We fixed an issue that resulted in an error message "An unknown error occurred". The error occurred when you expanded the Graphs card of a sensor and then closed it with the x button.
You can now add channel graphs again via the Add button in the expanded view of the Graphs page of a sensor.
We activated the Change Password button, which previously prevented you from submitting your request to set a new password.
You will now see a banner when you activate the new UI that will inform you about the development status. The text message with linked Knowledge Base article is The new interface is still in development and not yet feature complete. Please take a look at our Knowledge Base to see what is coming next.
We fixed an issue that resulted in not keeping the zoomed-out position of a graph of a device or sensor overview in down or warning status after the automatic refresh.

Improved

Various

All parts of PRTG	Various other minor fixes and improvements.
Languages	We updated the German and Spanish language files.

Previous Versions
and other Release Channels

Release notes for the "stable" release channel

April 10th 2024 - Version 24.2.94.1400

New

Multi-Platform Probe

Multi-Platform Probe Stable Release

Probe Adapter

Multi-Platform Probe Connection settings

Improved

Security

PRTG configuration file

Sensors

Webserver

Improved

Server

Logging

Single Sign-on

Fixed

WebGUI

Find duplicates

Note

Sensors

Discontinued sensors with PRTG 24.2.94

Changed

Sensors

VMware Datastore (SOAP) sensor

Fixed

Sensors

HTTP Transaction sensor

Memory

Microsoft Azure SQL Database sensor

Oracle SQL v2

QoS (Quality of Service) One Way sensor

Sensor logs

Sensor message

Sensor settings

SNMP HPE ProLiant Physical Disk Sensor

SNMP Memory sensor

Windows Print Queue sensor

Fixed

Server

API

Maps

Multi-edit

Notifications

Notification trigger

Remote probes

Fixed

PRTG App for Desktop

Access rights

Auto-Discovery

Proxy server

Note

Known Issues

PRTG application server

PRTG Administration Tool

Note

Installer

Security

Lab

New UI

Device settings

Mobile view

Lab

PRTG API v2

API

PRTG application server

Improved

Various

All parts of PRTG

Languages

Sensor languages

February 14th 2024 - Version 24.1.92.1554

Blog article

PRTG release 24.1.92 is available in the stable release channel!

New

Sensors

Cisco Meraki sensors

FortiGate VPN Overview sensor

HTTP v2 sensor

Local Folder sensor

Release notes
for the "stable" release channel