Serves the user interface (UI), API endpoints, and configuration dashboards.
Initiate an Auto-Discovery scan on your target subnets. PRTG will analyze responses, identify device types, and automatically instantiate relevant sensors. 5. Security and Access Control
Navigate to a sensor (e.g., a Windows Disk Free Space sensor). Open the . prtg network monitor 21.0.x
Remote probes frequently disconnect.
The sensor gained better wildcard search capabilities, allowing administrators to look for specific strings more efficiently. The new "Search String Contains" setting now supports: Simple string (default) Wildcards Regular expressions Serves the user interface (UI), API endpoints, and
Alerts in PRTG go beyond basic "Up/Down" states. You can configure:
The 21.0.x generation (covering versions such as 21.1.65 up to 21.4.73) standardized this multi-channel model while embedding settings directly into the core platform. This toggling capability allows administrators to spin up beta sensors fresh from Paessler labs without compromising the overall stability of the primary core monitoring server. Major Features in the 21.0.x Ecosystem Remote probes frequently disconnect
If you are currently running a PRTG version , you likely need to follow a multi-step upgrade path through several intermediate versions to reach the 21.0.x series.
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| Requirement | Details | | :--- | :--- | | | Microsoft Windows Server 2025, 2022, 2019, 2016, Windows 11, or Windows 10 (64-bit recommended). Windows Server Core mode is not supported. | | .NET Framework | .NET 4.7.2 or later is mandatory; .NET 4.8 is recommended for best performance and compatibility. | | Hardware (General) | Dependent on monitoring needs. For up to 500 sensors, a recommended starting point is 4 CPU cores, 4 GB RAM, and 100 GB disk space. For up to 1,000 sensors, 6 CPU cores, 6 GB RAM, and 500 GB disk space is more suitable. | | Web Browser | Google Chrome 75 or later (most recommended), Mozilla Firefox 67 or later, Microsoft Edge 79 or later, Safari 11 or later. Internet Explorer 11 may have functional limitations. |
: Significant updates were made to the core sensors (SNMP, WMI, and NetFlow), reducing the CPU overhead on the monitoring server while increasing data polling frequency.