Release Notes for the
"Stable" Release Channel

Software versions in this channel are updated about once a month. 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!

 

Go to Download Page

Manual: Using the "Software Auto-Update" Function of PRTG

Previous Versions and other Release Channels


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May 15th 2019 – Version 19.2.50.2842


Blog article

PRTG Release 19.2.50: Measure MQTT Roundtrips with PRTG and Other News about the Release

The PRTG release version 19.2.50 has been available for installation in the stable channel for several days now. Maybe you already have the version in use, or you are planning the update. As...
Read the complete blog post here



New

Sensors


MQTT Round Trip

This PRTG version comes with the new MQTT Round Trip sensor! You can now monitor the availability of an MQTT broker to ensure your IoT devices can deliver their data at all times. Use the MQTT Round Trip sensor to check if a connection to the broker can be established, if the broker accepts messages via publish, if the broker forwards a message to a matching subscriber, and measure either the connection times or the round trip time from publishing a message until receiving it back on a subscribed topic.

The sensor shows the message round trip time, the round trip status, the publisher connection time, and the subscriber connection time in different sensor channels. Keep a close eye on your IoT infrastructure - with PRTG and the new MQTT Round Trip sensor!

Improved

Sensors


DHCP

You can now monitor multiple DHCP servers in different networks. The DHCP sensor will send the data packets only via the selected NIC to monitor the DHCP server. If there is no DHCP server available in the specified network, for example, if the NIC has a link-local address, the sensor will time out as expected.

FTP Server File Count

The FTP Server File Count sensor now supports TLS 1.2 connections.

Oracle SQL

We updated the Oracle library that Oracle SQL v2 and Oracle Tablespace sensors use to monitor your Oracle databases. We have seen that both sensor types cause less CPU load on the PRTG probe system compared to previous versions when using the updated library.

VMware Host Hardware Status (SOAP)

You can now define Known Warnings and Known Errors in the settings of the VMware Host Hardware Status (SOAP) sensor that include angle brackets (<>) to ignore messages that include such characters.

VMware Host Performance and VMware Virtual Machine (SOAP)

The sensor types VMware Host Performance (SOAP) and VMware Virtual Machine (SOAP) can now inherit the Channel Unit Configuration settings from the parent device. Please note that this still is not possible for certain units like bandwidth, for example.

Windows IIS Application

We added two new channels to the Windows IIS Application sensor. The channels show status and system uptime of a monitored web service. If the web service is not available, the sensor will show a down status.

Improved

Notifications


Amazon SNS Notifications

The Location setting of the notification method Send Amazon Simple Notification Service Message now shows all available SNS locations in a dropdown list instead of a bullet list for a better usage of the available space.

Execute Program

Notifications that execute programs now show a meaningful message in notification related logs instead of an access violation if the defined credentials are incorrect.

Notification Templates

On the Notification Templates tab in your account settings, you can now directly test an existing template, pause or resume it, and open a list of objects that use the template. The functionalities are accessible in the notification templates table without the need of using the multi-edit menu.

Notification Triggers

Notification templates that you select for a notification trigger now show the actions they perform with an according icon in the dropdown before the template name.

SMS Notifications

  • Ampersands (&) are now correctly URL-encoded (%26) in SMS notifications even if you use a custom URL for SMS delivery. In previous versions, the encoding was missing in this case so that the notification messages were truncated to everything before the ampersand.
  • PRTG will now create a meaningful ticket if sending an SMS notification fails due to connection issues.

Improved

WebGUI


Multi-Edit

  • You can now acknowledge one or more down states on the Alarms tab of the root group, of a group, and of a device using the multi-edit menu.
  • We improved the usage of the available space when editing multiple tickets at once.

Reports

We changed the rendering engine for PDF reports. PRTG now uses Chromium instead of the deprecated PhantomJS to be able to generate PDF reports in a more reliable way. Screenshots that you generate for the support bundle also use Chromium now.

Known issue: Please ensure port 9222 is not blocked on the PRTG core server system to generate PDF reports and screenshots. This only affects PRTG version 19.2.50.

Tags

Clicking a tag in the settings of a Notification Template or Map now opens a list with all accordingly tagged objects.

Improved

Server


Cluster

We slightly improved the cluster performance.

Probe Connections

We slightly improved the performance of probe connections by introducing a threadpool instead of using two dedicated threads for each probe. You will especially notice the improvement if you have many remote probes connected.

Changed

Sensors


Packet Sniffer

Packet Sniffer and Packet Sniffer (Custom) sensors now use the Npcap library instead of the deprecated WinPcap to monitor your traffic.

Note: If you need to downgrade from PRTG 19.2.50 or later to a PRTG version 19.2.49 or previous for some reason, please first stop the PRTG services and manually uninstall Npcap before you install an older PRTG version.

Loopback Adapter

PRTG now installs a loopback adapter as part of the Npcap library for Packet Sniffer sensors.

Note: If your remote probe runs additional services, for example a DHCP server, this adapter might have an effect on these services. If you experience issues, we recommend that you disable the adapter. This will not affect PRTG.

Changed

WebGUI


Device Icons

We replaced the previous SVG device icons with new TinySVG 1.2 compliant icons.

Fixed

Sensors


Cisco IP SLA

PRTG will not create an instance of the Cisco IP SLA sensor for an OID anymore if the target device does not return values for this OID. In such cases, the Cisco IP SLA sensor immediately showed a down status with the message No such object (SNMP error # 222) after sensor creation in previous versions.

HTTP

The auto-discovery creates working HTTP sensors again even if the target device only runs on HTTP (ports 80, 8080). In previous versions (since PRTG 18.3.42), the auto-discovery only created properly working HTTP sensors for HTTPS devices (port 443).

HTTP Advanced

The HTTP Advanced sensor can monitor a website over a proxy server with basic access authentication (HTTP) now. In previous versions, it returned an error with the message Unauthorized (HTTP error # 401) when using a proxy.

IMAP

We improved the message filtering of the IMAP sensor. In previous versions, the IMAP sensor only recognized the content types text/html and text/plain if the attributes were written in lowercase. Depending on the configuration of your email server, they can be written in different casing, so that the sensor could not find matching messages. This will now work.

NetApp NIC

NetApp NIC BETA sensors that you add to a NetApp cDOT or ONTAP with a version earlier than 9.2 will not create the Healthy channel anymore. NetApp versions previous to 9.2 do not return according data so the Healthy channel just remained empty after sensor creation.

Sensor Factory

We fixed several issues with the Sensor Factory sensor. Reports and graphs now include all data without gaps that occurred in certain cases, and the error handling as well as the no data behavior realize your defined options more reliably.

SNMP Cisco System Health

PRTG again only creates one instance of an SNMP Cisco System Health sensor per selected item in the Add Sensor dialog. In browsers other than Chrome (for example, Firefox and Internet Explorer 11), each selected measurement of the SNMP System Health sensor was added twice in previous versions.

SNMP Custom Table

The column headers in the Table Specific settings in the Add Sensor dialog of the SNMP Custom Table sensor are now always aligned with their columns so you can easier identify which data belongs to which column. In previous versions, the column headers did not scroll sideways with the table content.

SNMP Windows Service

The table of Windows services in the Add Sensors dialog of the SNMP Windows Service sensor has now paging so you do not have to scroll down through all the services anymore.

WMI Microsoft SQL Server

We removed the obsolete setting SQL Server Version from the sensor types WMI Microsoft SQL Server 2017, WMI Microsoft SQL Server 2016, WMI Microsoft SQL Server 2014, WMI Microsoft SQL Server 2012, WMI Microsoft SQL Server 2008, WMI Microsoft SQL Server 2005.

Fixed

Server


Images

We fixed an issue with images in PRTG that were not correctly loaded (for example, graphs in reports) when the port to publish PRTG via NAT or on a load balancer did not match the port of the web server.

Search

We fixed an access violation that appeared in certain cases on the PRTG core server and resulted in a malfunctioning PRTG search, not returning any search results.

Fixed

WebGUI


Dark Theme

  • Data graphs in HTML email notifications will now always appear in light theme style, even if you use the dark theme of the PRTG web interface. The same applies to graphs in reports that you generate via the historic data tab of a sensor. In previous versions, graphs in emails and historic data appeared dark when using the dark theme.
  • Dialog windows and context menus are now better distinguishable from the background when using the dark theme.

Dropdown Menus

Entries in dropdown menus are better readable again. In previous versions, some dropdown menus like, for example, the report templates list appeared with blurred section headings in Google Chrome.

Graphs

Zoomed graphs automatically refresh their data again, as well as the according page footer shows up again. You can open a zoomed graph via the button Zoom graph in new window on several pages in the PRTG web interface.

Maintenance Window

If a sensor, device, group, or probe has the inheritance of the Schedules, Dependencies, and Maintenance Window setting enabled, PRTG will not validate the values (for example, start and end time of the maintenance window) anymore when you click Save. In case of enabled inheritance, the settings on this device tree level are inactive anyway. The previous behavior resulted in unnecessary error messages in certain cases.

Mobile Android Probe

We removed the last remaining links from the PRTG web interface that lead to the download page of PRTG Mobile Probe for Android. The app is not official supported and was removed from the Google Play Store some months ago.

Multi-Edit

The multi-edit menu is always available now if you have selected at least one item in a list (for example, a list of devices, sensors, reports, maps, libraries). In previous versions, the menu disappeared after cancelling the delete dialog while one or more items were still selected.

Page Refresh

The pause and resume buttons for the automatic page refresh in the page footer now always show the correct status, indicating if a click will pause or resume the refresh countdown.

Quick Ranges

We improved the filtering with quick range buttons, for example, for logs. The filters now better correspond to what the buttons say.

Reports

Data table entries in reports with a downtime greater than 0% are highlighted in red color again. We also improved the layout of reports with very long names and report related pages.

Search

The item count selector on the detailed search page now shows the current number of shown results per page without hovering over the selector.

Smart Setup

If you skip single steps or the the whole introduction, the setup assistant on a new PRTG installation will keep your decision and does not show up unwanted anymore.

User Rights

Only PRTG user accounts with administrative rights can download remote probes now. Read/write users and read-only users do not have the option anymore to open the Remote Probe Installer tab under Setup | Downloads and Tools, nor have the permission to do so on other places in the PRTG web interface. Read-only rights for remote probe downloads also apply to failover nodes in a PRTG cluster.

Fixed

Various


All Parts of PRTG

Various other fixes and improvements to all parts of PRTG, updated user manual

Note

Known Issue: Reports


Report Period in Chrome

In the current version, manually defining a date range (Period) with Start Date and End Date is not possible if you access the Report page with Google Chrome and your currently logged in PRTG user account uses the date format DD.MM.YYYY (24h or AM/PM). The date validation fails in this case.

Workaround: Because the issue only exists in Chrome, you can use another browser like Firefox, Internet Explorer 11, or Edge to manually define a report period.
Another option is to temporarily change the Date Format of your PRTG user account to MM/DD/YYYY or YYYY-MM-DD (24h or AM/PM). You can do so under Setup | Account Settings | My Account, section Web Interface.

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April 16th 2019 – Version 19.2.49.2018


Fixed

Server


Dependencies

Dependencies work as expected again. In previous PRTG 19.1.49/19.2.49 versions, an issue with dependencies resulted in unwanted down notifications that were not expected due to dependencies defined over different groups and subgroups.

calendar

April 9th 2019 – Version 19.2.49.2004


Fixed

Various


Manual

We fixed an issue with the PRTG manual where in some cases it was not properly displayed.

calendar

April 8th 2019 – Version 19.2.49.2001


Fixed

Server


PRTG Core Server

We fixed an issue with the PRTG core server where in certain cases access violations (for example, schedule thread exceptions) lead to read and write locks. The issue could result in unexpected server restarts.

Server Startup

In rare cases, the PRTG server did not automatically start after a fresh installation. We fixed this behavior.

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March 4th 2019 – Version 19.1.48.2929


Blog article

Don’t Miss News About PRTG Release 19.1.48

Welcome to the first PRTG Release News on the blog in 2019. I hope you had a fantastic start to the new year and have bravely stuck to your good intentions so far. Our developers are already...
Read the complete blog post here



Fixed

Server


Cluster and Reports

Reports contain data from failover nodes again if defined in the report settings.

Cluster and Sensors

It is possible to add meta-scan sensors to devices on the cluster probe again. In previous 19.1.48 versions, the meta-scan did not work and never finished on the cluster probe so that you could not add any meta-scan sensors.

Dependencies

Dependencies work as expected again when a master object returns from a down status, so that all dependent sensors will automatically resume monitoring as soon as the master object comes back. In previous 19.1.48 versions, dependent sensors did not resume in some cases but showed a paused by dependency status even if the target device was reachable again.

Fixed

Probe and Sensors


Probe and Sensors

We fixed a potential memory leak that occurred when using many SNMP sensors with multi get as request method.

.NET Tickets

We reduced the amount of created PRTG ToDo tickets that inform about the required update to .NET 4.7.2 on a probe system. PRTG will now only create a new ticket when there is not an open ticket about .NET 4.7.2 on the probe yet.

Note

Known Issue: Down (Acknowledged)


Acknowledged by

In current versions, PRTG does not show the user account who acknowledged the down status of a sensor. The user name is missing in the sensor message and in the log of a sensor in Down (Acknowledged) status.

Status: resolved with PRTG 19.1.49.1966

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March 28th 2019 – Version 19.1.49.1966


Blog article

PRTG Release 19.2.49 News Roundup – PRTG Desktop, .NET 4.7.2 and More…

For a few days now, the PRTG release 19.2.49 has been available for download on the stable release channel. The current release contains a lot of improvements, including improved performance of...
Read the complete blog post here



New

Apps


PRTG Desktop

The PRTG Desktop client is now fully integrated in PRTG! You can directly open the download page from the PRTG web interface under Setup | Downloads and Tools | Desktop Client Apps or via the automatically created shortcut Get PRTG Desktop on the system you run your PRTG server and install the app on your desired system.

PRTG Desktop is a new native PRTG application that runs on supported Windows and macOS systems. Use PRTG Desktop to completely control one or more PRTG installations with one app and show data of all your independent PRTG core servers including PRTG hosted by Paessler. The integrated tray tool will notify you whenever PRTG discovers issues in your network. You can also import server connections from the Enterprise Console.

For more information and a direct download link, see the PRTG Desktop app webpage.

Changed

Sensors


EXE-Based Sensors

PRTG now requires .NET version 4.7.2 installed on all computers running a probe for all sensor types that require the .NET framework. You will receive a ToDo ticket in PRTG for each affected probe if .NET 4.7.2 is missing. You will not be able to add .NET sensors anymore in this case and running .NET sensors will show a down status with error code PE104 after you have installed the PRTG update.

For more details, please see this Knowledge Base article.

SNMP HP and SNMP HPE Sensors

We updated the names of several sensor types to reflect differences between devices from Hewlett Packard Inc. and Hewlett Packard Enterprise. Except for the SNMP HP LaserJet Hardware sensor, all former SNMP HP sensors have now a leading SNMP HPE in the sensor name. Please note that we already updated the device icons in PRTG version 18.2.41. There are no functional changes.

Changed

API


JSON

JSON output from the PRTG API now returns all fields as string values as long as the textraw format is not used for the field, even if a field was returned as integer until now. For example, priority in table.json is now returned as string instead of integer.

Improved

Server


Active Directory

We improved the performance of Active Directory group synchronization when PRTG Active Directory accounts are members of two or more PRTG Active Directory user groups. You will especially perceive the improvement if you use PRTG apps to access PRTG.

Tags

We improved the way PRTG handles tags in the background, providing more consistency, stability, and a slightly improved performance for tag usage.

PRTG Core Server

Several other minor performance improvements

Improved

Sensors


SNMP Synology Logical Disk

We added 9 new states to the standard lookup file of the SNMP Synology Logical Disk sensor, so your are now able to monitor all possible states of your Synology RAID.

Windows Process

The Windows Process sensor now supports 64-bit processes and accurately monitors processes that use more than 4 GB RAM (private bytes).

Fixed

Security


API

We fixed a potential DoS vector in the PRTG API.

Sensors

We improved the input validation of port fields in sensors settings. The fix closes a potential attack vector for malicious activities like Remote Code Execution (RCE). The issue was reported by Anton Vaychikauskas and Dmitry Galecha from Positive Technologies, thank you! (CVE-2018-19204)

WebGUI

We fixed some potential XSS vulnerabilities in the PRTG web interface. Thanks to the usd Bug Bounty Team (CVE-2018-14683), as well as Anton Vaychikauskas and Dmitry Galecha from Positive Technologies for reporting the issues!

Fixed

Sensors


Cloud HTTP and Cloud Ping

It is not possible to add Cloud HTTP or Cloud Ping sensors to IPv6 devices anymore because they do not support IPv6 and just showed an error message in this case.

Sensor Factory

Gauges of Sensor Factory sensors are now properly shown even if you use certain special characters in the channel definition.

Fixed

Server


Auto-Discovery

The PRTG auto-discovery adds found devices exactly written as they are named in the DNS, considering upper and lower case. In previous versions, PRTG erroneously added devices only in lower case.

Cluster

The Master Heartbeat now also works on failover nodes that become the current master. The file you choose via the PRTG Administration Tool on the failover server will be executed every 5 minutes as expected.

Dependencies

We fixed another issue with dependencies where pausing by dependency did not work as expected in certain cases. If a sensor is set as master dependency, the sensor shows a down status in case of an error again instead of a paused status as it sometimes happened in PRTG 19.1.48.

Device Tree

The group in the device tree that is automatically created when adding a new PRTG user group now always has the same name as the user group with an attached home (for example, New User Group home), even if the user group was created while adding a new user account. The group part of the name was missing in the device tree group in such cases.

Down (Acknowledged)

PRTG shows the user account who acknowledged the down status of a sensor again. As usual, the name will appear in the message as well as in the log of a sensor in status Down (Acknowledged). In PRTG version 19.1.48, the name of the acknowledging user account was missing.

Logging

The logging level in configuration files is now case insensitive for easier usage.

Maps

The History tab of maps now always contains an entry with the date the map was created. In previous versions, the entry disappeared as soon as 100 history entries were reached.

Probes

Your Python processes on PRTG probe systems will now continue running when you update your probes. In previous versions, updating probes resulted in terminating all Python processes on the machine because the updater did not check which process runs python.exe.

Server Startup

We fixed an issue with custom toplist fields where the check for the status of the target data structure was missing when PRTG upgrades the field declaration due to a change in PRTG version 18.4.47. Depending on when the custom field was created, the start of the PRTG core server could have been blocked by the issue. The error message that appeared in the PRTG core server log or when trying to start the server via the PRTG Administration Tool was TPaeInternalList.SetData: Col index out of bounds: 3(2)

Unknown Status

We fixed an issue where the system time of PRTG probe and server ran out of synchronization, which could result in grey sensors (for example, Ping sensors) in PRTG 19.1.48.

You also might have noticed the issue if you use the WMI UTC Time sensor that showed a steadily increasing value in the Difference channel (time difference between PRTG system time and monitored device), which is also fixed with this new PRTG version.

Fixed

WebGUI


Cluster

  • We improved the layout of the Cluster Status page so that each host name is now fully shown.
  • The refresh of sensors pages on the cluster probe device now happens without unnecessarily appearing spinning wheels at the bottom of the page.
  • Switching the cluster node when using map rotation now works. In previous versions, PRTG was not able to find a map ID after switching the node and showed an according error message in this case.

Dark Theme

We improved the readability of notification template names when editing notification triggers in the dark theme.

Dependencies Graph

The dependencies graph now properly displays select dependencies that were not shown in certain cases.

Device Tree

  • When moving objects in the device tree (for example, groups or devices), the More button that appears when more than 20 sub-objects (for example, sensors) are affected by the action will now redirect to a search page that lists all affected objects. In previous versions, this page just was empty and did not show any search results.
  • Using special characters like a dot (.) as custom channel unit now works and will not result in a broken device tree view anymore.

HTML Email Notifications

We improved the readability of HTML email notifications that contain SNMP Trap or Syslog messages resolved from the placeholders %traperrors, %trapmessages, %trapwarnings, %syslogerrors, %syslogmessages, %syslogwarnings

Maintenance Window

Minor usability improvements for the maintenance window setting in the PRTG device tree

Management Tab

We fixed a layout issue on the Management tab where the device tree showed too much whitespace between devices in browsers other than Chrome.

Reports

Reports now show an according message when there are no sensors included in the report instead of showing just an empty page.

System Information

  • System information pages now only request data according to the PRTG standard refresh timer (every 30 seconds) and do not cause the browser to send update calls every second for every table anymore.
  • The refresh button or the refresh indicator is now always visible on system information tables, depending on the current status of the table.
  • We removed spurious bullet points that sometimes appeared in system information tables when no data has been retrieved yet.

Toplists

Layout improvements for the time-range selector on toplist pages

Welcome Page

Read/write users and read-only users can now stay on the PRTG welcome page without receiving the message Error (Bad Request). Sorry, your user account is not allowed to access this information. because of erroneously trying to retrieve license information.

Fixed

Various


Languages Files

Major update of the Dutch language file, especially more consistency in terminology, and updated German language file

All Parts of PRTG

Various other fixes and improvements to all parts of PRTG, updated user manual

Note

PRTG 19.1.49.1916


Memory Leak

Please note that we took PRTG version 19.1.49.1916 (released on March 19) offline on March 21. The PRTG core server included a memory leak in version 19.1.49.1916. Depending on your monitoring scenario, this could lead to critical memory consumption on your PRTG server.

The new PRTG version 19.1.49.1966 includes a fix for the memory leak. If you are running the withdrawn version 19.1.49.1916, please update as soon as possible.

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February 19th 2019 – Version 19.1.48.2891


Fixed

Sensors


SNMP Dell PowerEdge Physical Disk

The SNMP Dell PowerEdge Physical Disk sensor lists all available disks again when you add a new sensor of this type. In the previous 19.1.48 versions, it only showed one disk after the meta-scan in the Add Sensor dialog.

SNMP HP BladeSystem Enclosure System Health

The SNMP HP BladeSystem Enclosure System Health sensor works again. In the previous 19.1.48 versions, sensors of this type always failed with the error message Duplicates not allowed.

Fixed

Server


Dependencies

Master dependencies work again when they were taken over by cloning a device, so that all dependent sensors will automatically pause by dependency as soon as the master object fails. In the previous 19.1.48 versions, dependent sensors on cloned devices did not pause by dependency but showed a down status if the target device was not reachable, which could result in receiving many unnecessary notifications, for example.

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February 14th 2019 – Version 19.1.48.2876


Fixed

Server


Sensor Graphs

We fixed an issue with the PRTG graph data cache recalculation. After updating to PRTG version 19.1.48.2868, historic data graphs did not show data in certain cases because of the issue. If you were affected by the issue, please don't panic, your data is not lost. Your data will be shown again after installing the new PRTG version 19.1.48.2876.

Fixed

Sensors


SNMP Linux Disk Free

The SNMP Linux Disk Free sensor works as expected again. In the previous PRTG version 19.1.48.2868 it failed when monitoring certain Linux distributions like, for example, Debian 6, Debian 7, and CentOS 6. Affected sensors showed an error with the message List index out of bounds (0).

calendar

February 11th 2019 – Version 19.1.48.2868


Important

Known Issues


SNMP HP BladeSystem Enclosure System Health

SNMP HP BladeSystem Enclosure System Health sensors will show an error with the message Duplicates not allowed after the update to PRTG version 19.1.48.2868 in certain cases. We recommend that you wait with the update of your PRTG installation until we publish a fix for the issue if you are using SNMP HP BladeSystem Enclosure System Health sensors.

Status: resolved with PRTG 19.1.48.2891

Sensor Graphs

After updating to PRTG version 19.1.48.2868, historic data graphs will not show data in a few cases. This happens due to an issue with the PRTG graph data cache recalculation. If you are affected, please don't panic, your data is not lost. We will provide a fix for the issue as soon as possible and your data will be shown again.

Status: resolved with PRTG 19.1.48.2876

SNMP Linux Disk Free

SNMP Linux Disk Free sensors will show an error with the message List index out of bounds (0) after the update to PRTG version 19.1.48.2868 when monitoring certain Linux distributions. Affected are, for example, Debian 6, Debian 7, CentOS 6, Mandriva Linux 7.2 Odyssey, Ubuntu 12.04. Please note that these are affected distributions from which we only know right now. We are currently working on a fix and recommend that you wait with the update of your PRTG installation until we publish it if you are using SNMP Linux Disk Free sensors.

Status: resolved with PRTG 19.1.48.2876

Improved

Sensors


Lookups

We added two new standard lookup files to PRTG that reflect the Boolean values 1 (true) and 0 (false). Use prtg.standardlookups.boolean.statetrueok as lookup if you want to have an up status for true (returned 1), use prtg.standardlookups.boolean.statefalseok if you want to have an up status for false (returned 0).

SNMP HP ProLiant System Health

We added the lookup status noPowerInput(17) to the standard lookup file prtg.standardlookups.hp.powersupplystatus of the SNMP HP ProLiant System Health sensor. The sensor will now show an according down status if your target device returns this value.

SNMP Sensors

We changed the method that SNMP sensors use on creation to search for available monitoring items on the target device ("meta-scan"). SNMP sensors will now use GETBULK requests during meta-scan instead of GETNEXT. With SNMP GETBULK, the sensors request 10 OIDs at a time by default, which leads to performance improvements in comparison to GETNEXT that requests only 1 OID at a time.

The change also affects the System Information feature, so that the DDoS protection of QNAP devices should report alerts less often because of PRTG.

Note: Only SNMP v2c and SNMP v3 support GETBULK, for SNMP v1 you still have to use GETNEXT. You can change the setting in the SNMP Compatibility Options of the target device in PRTG, section Walk Mode.

Improved

Server


PRTG Core Server

This version includes various minor and major performance improvements, especially for the handling of a lot of remote probes. We also improved the scalability of the server with CPU cores and memory, the server startup times, and the post-processing of configuration changes (special thanks to electromichi for pointing us to this issue!).

Improved

WebGUI


Maps

The Top 10 lists Longest System Uptime and Shortest System Uptime are now available as map objects.

Notification Delivery

You can now directly test your SMTP and SMS settings on the Notification Delivery tab to check immediately if your settings work without changing pages and losing your context. Just click the button Test SMTP Settings or Test SMS Settings and see if your delivery settings work.

Object History

The object history of a notification template now indicates if settings of this template have been changed, Also, resuming an object like a sensor or device from paused status appears in the object history as of this version.

Fixed

Sensors


Business Process

Saving the settings of a Business Process sensor is now also possible when you only remove an object from the channel definition because the Save button is now active after the change. Also, when deleting an object from the channel definition, all objects are still shown and not only the first 7 entries so that you can easier delete more than 1 object.

File and Folder

File sensors and Folder sensors now use a negative value to indicate when the timestamp of a modified file is in the future. This approach will prevent the sensors from showing false warnings in such scenarios.

File Content

You can now add File Content sensors with the auto-discovery using your own device template. In previous versions, PRTG erroneously added File Content sensors as File sensors to newly created device templates, so that an auto-discovery with this device template only added File sensors.

IMAP

You can now use the setting Check connectivity only, do not process emails without providing credentials for the monitored mailbox. Credentials are not required in this scenario but were requested when you have manually added the sensor in previous versions.

Sensor Factory

The Sensor Factory sensor handles angle brackets (<>) in the channel definition in a better way now. The sensor overview tab will not appear broken anymore if you use these characters, but please note that the sensor gauge still will not look perfect in such cases.

SNMP Cisco System Health

The SNMP Cisco System Health sensor now shows a down status with error code PE268 if the sensor runs against an invalid OID. The sensor will show a down status with error code PE269 if there are one or more channels for which the sensor cannot query data. In previous versions, the sensor status was not expressive enough in such cases because it only showed unknown (gray color) or up with empty channels.

SNMP IBM System X System Health

We fixed the appearance of the gauge for the Overall Status channel of the SNMP IBM System X System Health sensor. The gauge did not properly appear because the sensor used a unit type not supported by lookups. The sensor now also shows the return message if the target device returned an invalid value (sensor value -1).

Important: To apply the fix, please add the sensor anew.

SNMP Linux Disk Free

The SNMP Linux Disk Free sensor now creates channels for all disks on the target device. In previous versions, the sensor stopped searching for available disks during sensor creation as soon as there was a missing OID in the index table and so did not create channels for each disk on the target system.

SNMP Synology Logical Disk

The SNMP Synology Logical Disk sensor is now able to recognize when the order or name of a volume changes. In previous versions, it was possible that the sensor monitored an incorrect volume in such cases, which resulted in wrong monitoring data.

Windows Updates Status (PowerShell)

We fixed an issue with the Time since last update channel of the Windows Updates Status (PowerShell) sensor that still showed incorrect values in certain use cases after the improvements in the previous PRTG version 18.4.47.

Fixed

Security


Login

  • We fixed a security issue that allowed to modify text on the login page of the PRTG web interface. This content spoofing issue could have been exploited for phishing, for example.
  • We fixed a reflected XSS vulnerability on the login page of the PRTG web interface. Special thanks to Damian Schwyrz for reporting the issue!

Reports

We removed PRTG credentials (login name and passhash) from the URL of HTML reports that appeared in certain cases.

Fixed

Server


Auto-Discovery

We fixed an issue with the custom meta-scan that you can use with the auto-discovery but did not work as expected in certain cases. Please note that this functionality is still not officially supported.

Installer

PRTG now correctly switches from the 32-bit version to 64-bit after a server restart when the machine on which PRTG runs upgraded from less to more than 6GB RAM. This did not work in previous versions when a server restart was pending (status "PendingReboot") because of some Windows update or similar.

Logging

Several fixes and improvements for the logging framework

PRTG Administration Tool

If you change the Local Storage of Data Files and Monitoring Database folder on the Core Server tab in the PRTG Administration Tool, PRTG will also restart the local PRTG probe service along with the PRTG core server service now to immediately apply the changes. This is necessary to write data into the correct folder.

Server Startup

We fixed an issue that occurred when adding or editing a Sensor Factory sensor using Internet Explorer 11 or Edge. In this case, some control characters were wrongly added to the PRTG configuration file, which resulted in a failing start of the PRTG server. The error message in this case was: Sorry, could not start PRTG Core Server (Web server) [...] Formula empty.

Updating from Version 18.1.37 or Older

Direct updates from PRTG version 18.1.37 and previous versions to the current PRTG version 19.1.48 do work. It was not possible to directly update from these older versions to the previous PRTG version 18.4.47 because the PRTG server was not able to start in this case.

Fixed

Notifications


Slack and Teams

Slack and Microsoft Teams notifications now recognize line breaks within placeholders and show the whole content in a received notification.

Teams

The message when pausing a monitoring object like a sensor for 60 minutes via a received notification in Microsoft Teams now correctly is Paused via Microsoft Teams. In previous versions, PRTG showed the wrong pause message Paused via Slack.

Fixed

WebGUI


Dark Theme

  • We improved the look of the dark theme on various places in the web interface.
  • Graphs in historic data reports will now always appear in light theme style, even if you use the dark theme of the PRTG web interface and run a historic data report. Reports always have a white background, but graphs appeared dark in previous versions when using the dark theme.

Graphs

  • Unclickable graph legends do not appear as clickable anymore
  • Removed needless page footer when zooming a graph in a new window
  • Graphs on device tabs (2 days, 30 days, 365 days) show full sensor names again.

Maps

  • If you delete an object like a sensor from the device tree, maps that include this object will still properly work afterwards. In the previous version, maps that included a deleted object were suddenly empty, which you could only resolve with a restart of the PRTG server.
  • Better responsiveness of status icons to the length of current messages
  • Map objects now indicate when they are already on the lowest layer and so cannot be sent to back anymore in this case.
  • Improved readability of Minigraph only objects
  • High priority maps with 5***** stars now show their name on the browser tab instead of "undefined" when you open them via Home from the PRTG main menu bar.
  • We fixed an issue with auto-scaling of public maps that occurred when using the cluster map object.
Note: Please note that due to these improvements to maps, a longer existing issue with the Data Tables map object Alarms (gauges) became visible. We fixed the issue in this version, but you might encounter public maps that are constantly reloading after you updated PRTG from version 18.4.47 or previous. The issue occurs if your map contains a custom map object that uses the code of the Alarms (gauges) object and you are not logged in to PRTG. For more details, please see the article Why does my public map constantly refresh?

Multi-Edit

  • We fixed an issue that appeared in rare cases when multi-editing sensors. If one or more sensors selected for multi-edit were created via auto-discovery but include settings that were required but not filled, multi-editing resulted in a validation error. This special scenario affected the IMAP sensor, for example.
  • The multi-edit menu is now always visible on larger lists even when you scroll down.
  • Fixed layout when showing all objects (for example, sensors) in multi-edit dialog windows

Sensor Gauges

Sensor channels that show data as percentage now show gauges with minimum 0% and maximum 100% by default and appropriately display set limits.

Tables

Improved table layout and usage on various places, for example:
  • Better usage of available space for several tables, which also results in tables without jumping content
  • The mouse pointer now indicates that you can click channels in a sensor table to open the settings.
  • Font sizes in tables are now the same in each column.
  • Some minor fixes for filtering with tags

Tickets

  • Several style fixes for the PRTG ticket system
  • The multi-edit menu now works with lists of tickets, for example, to reopen tickets.

Top 10 Lists

Top 10 lists of sensors will not show sensors without current last value anymore.

Various

This version includes dozens of other minor fixes and improvements for the PRTG web interface. This will remarkably improve your overall experience with PRTG! The fixes and improvements affect the following parts of the web interface, among others.
  • Buttons: Improved positioning and style of several buttons
  • Breadcrumbs: Several layout fixes
  • Channel settings: The color picker now always reflects the current hex value.
  • Cluster: Several layout fixes for cluster visualizations, for example, on cluster status and cluster setting pages
  • Configuration reports: Several style fixes
  • Dependencies graph: Minor display fixes
  • Device tree: Fixed loading icons that only disappeared after a page refresh
  • Dialog windows: Several style fixes and usage improvements for dialog windows that you open via context menus, for example.
  • Hover popups: Graphs are ordered by covered time span again
  • Icons: Several fixes for icons throughout the web interface, for example, the object selector has the correct reading glass symbol now in dependency and library settings
  • IE11 and Edge: Several fixes for the web interface when used with Internet Explorer 11 and Edge
  • Language selection: We removed the needless request to select a file.
  • Lists: The behavior of "Select all" checkboxes in lists is more consistent now.
  • Management tab: Several layout fixes
  • Notification templates: Better usage of available space in the list of notification templates, so that longer template names are not cut off too early anymore
  • Priority and favorites: Several fixes for the option to set priority and favorites on several places
  • Remote probe installer dialog: Layout and style fixes for the dialog window that guides you through installing a remote probe
  • Reports: Several layout fixes for historic data reports
  • Setup page: No more empty boxes that appeared for user accounts with certain rights
  • Simulate error: Sensors now immediately show the "Simulated error" status after clicking the simulate error button and do not require a (manual) page refresh anymore.
  • Sunburst: Sections without elements that appear white in sunburst view have borders again.
  • Toplists: Several style and layout fixes for toplist pages

Fixed

Various


All Parts of PRTG

Various other fixes and improvements to all parts of PRTG, updated user manual, updated language files

Note

Probe and Sensors


EXE-based Sensors

Future versions of PRTG will need .NET version 4.7.2 installed on all computers running a probe for all sensor types that require the .NET framework. You will receive a ToDo ticket in PRTG for each affected probe after each probe update if .NET 4.7.2 is missing. For more details, please see this Knowledge Base article.

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December 11th 2018 – Version 18.4.47.1962


Important

Known Issue: PRTG Update


Updating from version 18.1.37 or older

Please note that direct updates from PRTG version 18.1.37 and previous versions to the current PRTG version 18.4.47 do not work. Please wait with an update of your PRTG instance if you are currently running 18.1.37 or an older version until we publish PRTG 19.1.48. This version will include a fix for the issue.

If you update from PRTG 18.1.37 or previous, the PRTG server will not be able to start. It will show an access violation in this case. If you are affected by the issue, please contact our technical support team.

Status: resolved with PRTG 19.1.48.2868

Improved

WebGUI


Notifications

  • You can now see all defined notification methods in your PRTG user account settings at a glance. The Notification Templates overview table has a new column that shows the Actions a notification template will perform when it is triggered.
  • You can now use a search field to filter for existing notification templates when you add or edit a Notification Trigger.

Maps

We improved the readability of map objects with status-related background colors.

Improved

Server


PRTG Core Server

Several performance and stability improvements for the PRTG core server

Graphs

We updated the engine that PRTG uses to create data graphs. Thanks to the updated graphs engine, stacked graphs look better now!

Logging

This version includes some more improvements for the logging framework.

Improved

Sensors


HTTP Push Data Advanced

The HTTP Push Data Advanced now supports UTF-8 characters in the section of received messages and can display, for example, Chinese, Japanese, or Russian characters in the sensor message.

SNMP Trap Receiver

The SNMP Trap Receiver sensor now supports several modes for bindings that you can use with the syntax bindings[oid,value,mode].

Mode can be:
  • substring: This is the default mode that works like bindings[oid,value].
  • exact: This mode enforces an exact match of a value.
  • equal, greater, greaterorequal, less, lessorequal: This mode compares received numbers with the defined value.

Windows Updates Status (PowerShell)

We changed the approach of the Windows Updates Status (PowerShell) sensor to avoid down states that are not meaningful enough. As of the current PRTG version, the sensor will always create the channel Time since last update. All other channels only show up if the sensor can retrieve according data. Furthermore, the channel value is more accurate now.

Fixed

Server


PRTG Core Server

We fixed an issue with the PRTG core server. In certain cases, the issue lead to access violations in the PRTG server system that could result in issues with sending notifications or unexpected server restarts with sensors in unknown status.

PRTG GUI Starter

We fixed several issues with the PRTG GUI Starter. It will work more reliable now.

Security

We fixed a possible XSS vulnerability.

Server Startup

We fixed an issue with the flowid field in toplists of NetFlow sensors that could result in an exception during the startup of the PRTG server. The PRTG server did not start in such cases.

Fixed

Sensors


Channels

  • You can edit channel names in a sensor's channel settings again (where supported). In previous versions, the Name field in the channel settings often was read-only by mistake.
  • If you select the Data option Display in percent of maximum in the settings of a sensor channel, PRTG will now interpret any set Limits as percentage based on the maximum value to avoid false alarms.

Event Log (Windows API)

The Exclude Filter of the Event Log (Windows API) sensor now correctly disregards all events that you have added to the filter, for example, event IDs.

Flow Sensors

Stability improvements for the sensor types IPFIX, NetFlow V5, NetFlow V9, and sFlow: The fields FlowID, InboundInterface, and OutboundInterface in custom toplists are now stored with their field ID. In previous versions, they were stored as index, which could lead to issues when the list of fields changed.

Lookups

Lists of lookup files are sorted alphabetically again when you select value lookups for a sensor channel. IDs of lookups are also loaded case insensitively again to prevent issues when you override default lookups with customs lookups.

Sensor Factory

PRTG correctly calculates historic data of the Sensor Factory sensor again. In the last preview version, live data was used to calculate historic data instead of averages. This resulted in wrong values.

SNMP Custom String Lookup

We fixed an issue with device templates that include an SNMP Custom String Lookup BETA sensor. When running an auto-discovery with the template, PRTG created an unused channel that was not defined for the sensor.

SNMP sensors

SNMP sensors that support this functionality now only replace text within square brackets in the sensor name if the text is an OID or a defined variable. All other text will appear in the sensor name as it is.

SNMP Trap Receiver

The SNMP Trap Receiver sensor now properly handles quotation marks (") in the filter for bindings and can find strings that contain quotation marks.

UPS Health (Generic) Template

The device template UPS Health (Generic) now also supports Tripp Lite UPS, so running an auto-discovery with the template will create suitable sensors for your Tripp Lite UPS.

WMI Sensors

You can now add the sensor types Windows Physical Disk I/O, WMI Exchange Server, WMI Exchange Transport Queue, WMI Logical Disk I/O, and WMI Vital System Data (V2) using the auto-discovery. The auto-discovery could not successfully add these sensor types in previous versions.

Fixed

Notifications


Amazon SNS

We updated the signature version of Amazon SNS notifications to Signature Version 4, so it is now possible to send SNS notifications from AWS regions that only support this signature version like, for example, Canada (Central) (ca-central-1).

SMS

Using the placeholders %SMSNUMBER and %SMSTEXT in the path of custom URLs for SMS notifications works again. Due to an encoding issue, the placeholders only worked in the query string of a URL since PRTG version 18.3.43 and you received an unknown protocol error if your custom SMS provider requires number and text as part of the path.

Fixed

WebGUI


Credentials

We disabled the browser auto-complete of login and password fields in authentication sections of several sensor types (for example, HTTP Advanced and IMAP sensors). If you have saved your PRTG login credentials in your browser, your browser will not automatically fill in the credentials into PRTG settings sections anymore.

Tables

Paging on large tables and the selection of table items in the Add Sensor dialog works properly again. In previous versions, only sensors selected on the current table page were created.

Various

Several other minor fixes and improvements for the PRTG web interface

Fixed

API


XML

We fixed an issue with invalid XML returned by the PRTG API. For example, if a sensor included non-XML compliant characters in the sensor or log message and you requested the sensor via the PRTG API, this resulted in an error with the message cannot convert value.

Fixed

Various


Language Files

Major update for all language files!

All Parts of PRTG

Various other fixes and improvements to all parts of PRTG, updated user manual

Note

Probe and Sensors


.NET Version

Please note that we will upgrade our system requirements for the .NET framework in upcoming versions. Sensors that require the .NET framework will need at least .NET version 4.7.2 on all computers running a probe in the next PRTG version 19.1.48 that we plan to release in the first quarter of 2019.

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November 20th 2018 – Version 18.4.46.1754


Blog article

All You Need to Know About PRTG Release 18.4.46

The closer we get to the end of the year, the faster time seems to fly. It feels like just the other day we were stumbling over pumpkins and being scared by our next-door children with "trick or...
Read the complete blog post here



Fixed

Sensors


SNMP Traffic

We fixed an issue with the SNMP Traffic sensor that could lead to false spike values in certain cases. Please update your PRTG installation if you run one of the affected PRTG versions 18.4.46.1706 or 18.4.46.1736.

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November 14th 2018 – Version 18.4.46.1736


Fixed

Sensors


SNMP System Uptime

The SNMP System Uptime sensor shows correct uptime values again. In the previous PRTG version 18.4.46.1706, uptime values were wrong by the factor of 10 in certain cases.

calendar

November 7th 2018 – Version 18.4.46.1706


Improved

Server


PRTG Status

You can now see the names of all PRTG user accounts that are currently logged in to your PRTG instance! Open the PRTG System Status page in the web interface via the main menu (Setup | PRTG Status) and look at section Software Version and Server Information. There is the new entry Active User Sessions that shows all currently logged in PRTG users.

Remote Probes

Remote probes now always keep their defined names. In certain cases, the name of a remote probe changed to the host name after manually updating the probe.

PRTG Server

This version includes several stability and performance improvements for the PRTG server. For example, we dramatically improved the startup time especially with bigger configuration files, we reduced the memory usage of the core server after startup and after the configuration was saved, and we improved the performance of the website response a little.

Web Server Connections

The PRTG web server will now keep the option that you defined as IP address for the web server even if no IPs were found on the stack after a PRTG core server restart. In certain cases, usually after Windows updates, this resulted in the error No IPs could be found on the stack - reverting web server to local host after the core server started and the web server connection setting permanently switched to localhost.

Improved

Sensors


Amazon CloudWatch

We added the new regions US East (Ohio), EU (Paris), and Asia Pacific (Osaka-Local) to all Amazon CloudWatch sensors. You can use the new regions with the sensor types Amazon CloudWatch Alarm, Amazon CloudWatch EBS, Amazon CloudWatch EC2, Amazon CloudWatch ElastiCache, Amazon CloudWatch ELB, Amazon CloudWatch RDS, Amazon CloudWatch SNS, Amazon CloudWatch SQS.

SNMP System Uptime

We improved the fallback mechanism of the SNMP System Uptime sensor. The sensor uses the hrSystemUptime OID to retrieve the uptime value and uses sysUpTimeInstance as fallback if hrSystemUptime is not available (see also this article).

If both are not available, the sensor will show a down status until at least one uptime OID is available. If both are available again, the sensor will use the preferred hrSystemUptime. In previous versions, the sensor used the fallback sysUpTimeInstance in this case.

Changed

API


JSON

PRTG now returns strings from _raw columns surrounded by quotation marks ("") when you request JSON output, numbers still will be returned without quotation marks. In previous versions, quotation marks were missing for strings, which resulted in some issues because this was not common JSON. Please adapt your usage scenario of the PRTG API if necessary.

Example: "uptimetime":"642 d","uptimetime_raw":55492731

XML

The PRTG API now returns the correct response content-type header text/xml when you request XML output. In previous versions, the content-type was erroneously set to text/html.

Fixed

Sensors


Amazon CloudWatch Alarm

The Amazon CloudWatch Alarm BETA sensor now shows all configured alarms in the Add Sensor dialog. In previous version, some alarms were missing and could not be selected for monitoring.

Debug Options

We fixed an issue with the debug option Write sensor result to disk. In certain cases, some sensors continued writing the log files although the option was turned off again with "Discard sensor result".

DHCP

The DHCP sensor now correctly applies changes to settings. In previous versions, the check for server IP or client IP was still applied if you switched the option to Don't check but kept the entries in the include or must not include fields.

DICOM Bandwidth

The DICOM Bandwidth BETA sensor now shows the correct C-STORE size and correctly calculates the bandwidth usage of sent files.

SNMP NetApp Network Interface

The SNMP NetApp Network Interface sensor now applies the Unit for Bytes (Bandwidth) that you selected in the Channel Unit Configuration settings of the sensor's parent device. In previous versions, the sensor always showed traffic in MByte/s.

SNMP Traffic

We fixed an issue with SNMP Traffic sensors that were not addable to Cisco devices if selected additional channels were not available. PRTG showed the SNMP error #2003 in this case.

SSH Script and SSH Script Advanced

We fixed an issue with the search for scripts when adding an SSH Script or SSH Script Advanced sensor. The sensors were not able to find scripts and show them in the Add Sensor dialog when having certain localizations on target systems, for example, Italian.

WMI HDD Health

We fixed an issue with the WMI HDD Health sensor that occurred when parsing the instance name. The sensor returned an error message like "The query was not syntactically valid." if the WMI property InstanceName included certain characters.

Fixed

WebGUI


IE11 and Edge

Saving changes on setting pages when using Internet Explorer 11 or Edge is possible again. In the previous PRTG version 18.4.45, clicking save resulted in a saving window that did not disappear and the settings could not saved.

Various

Several minor fixes for the PRTG web interface

Fixed

Various


Lookups

We fixed an issue with the PRTG server where access violations regarding lookups resulted in missing channels of some sensors. This only happened under certain circumstances.

All Parts of PRTG

Various other fixes and improvements to all parts of PRTG, updated user manual (including API documentation for System Information), updated language files

Note

Installer


Trial Installation

If you download a PRTG trial version from paessler.com and run the installer on a fresh machine, you will not have to manually enter trial key and license name anymore.

calendar

October 19th 2018 – Version 18.4.45.1898


Blog article

PRTG Release 18.4.45 Offers More Tasteful Donuts, Various Improvements and No Halloween Surprise

We are posting this on the 31st of October, so one could generously call the PRTG release 18.4.45 a Halloween special. Of course, that's not quite right, because when we do a blog about a stable...
Read the complete blog post here



Fixed

Sensors


VMware Host Performance (SOAP)

The VMware Host Performance (SOAP) sensor now works with VMware 6.7 Update 1. The VMware update included a change in the API version that VMware Host Performance (SOAP) sensors could not correctly process. Affected sensors showed a down status with the error message Input string not in a correct format.