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"Unexpected behavior" notification



I’m wondering if it is possible in PRTG network monitor, to get notifications based on "unexpected behavior"? Not a trigger on a absolute number (volume or threshold), but depending on data from the past. When a sensor is steady increasing or decreasing in time, I want to know when the sensor data is deviating from its ‘line’. A change of angle of the graphic line.

Example: Free bytes of a disk are decreasing evenly but suddenly there is a change. Of course this could be made with a threshold trigger but the value must be adjusted for each case.

Is such an "unexpected behavior" notification already a part of PRTG?

network-monitor notifications prtg trigger

Created on Jan 19, 2017 2:39:51 PM

1 Reply



Dear Niko,

Thank you very much for your KB-Post.

The only way to do this is to use a state trigger for unusual to trigger your notification. For details about PRTGs unusual state, please refer to:

To define what exactly is "unusual" (for your system), please navigate to Setup >> System Administration >> Monitoring >> UNUSUAL DETECTION and set the conditions for this state.

Kindly note, that this settings will apply to all sensors. The only way to exclude a group/device from this is to deactivate the unusual-detection in the settings of that group/device under ADVANCED NETWORK ANALYSIS >> Unusual Detection.

Best regards,

Created on Jan 20, 2017 9:25:19 AM by  Sven Roggenhofer [Paessler Technical Support]

Disclaimer: The information in the Paessler Knowledge Base comes without warranty of any kind. Use at your own risk. Before applying any instructions please exercise proper system administrator housekeeping. You must make sure that a proper backup of all your data is available.