What is this?

This knowledgebase contains questions and answers about PRTG Network Monitor and network monitoring in general.

Learn more

PRTG Network Monitor

Intuitive to Use. Easy to manage.
More than 500,000 users rely on Paessler PRTG every day. Find out how you can reduce cost, increase QoS and ease planning, as well.

Free Download

Top Tags

View all Tags

Is it possible for alerts to stay as red even if sensor recovers?



If a sensor goes down and then recovers, is it possible to make the sensor still push an alert that needs to be acknowledged? E.g. if an uptime sensor goes down for any period, and the device is restarted, could the sensor be made to still raise an alert to notify the user that something has happened between instances of checking PRTG?

prtg sensor snmp

Created on May 19, 2020 4:20:33 PM

1 Reply



Hi there,

I'm afraid it's not possible to let the sensor in this failed state all tough the sensor is working properly again.

PRTG uses Notifications in combination with Triggers to send you alerts whenever PRTG discovers a defined status, such as slow or failing sensors, or when sensor channels breach threshold values. In case you want to know each sensor down, please configure Notification Triggers to get an alarm in case anything happens.

Please see the following link for a guide on how to setup notifications, including triggers: https://www.paessler.com/support/how-to/notifications-webinterface

For more information about this topic, please also see the following links: https://www.paessler.com/manuals/prtg/sensor_notifications_settings https://www.paessler.com/support/videos/prtg-basics/notifications https://www.paessler.com/support/videos/prtg-basics/notifications-use-cases https://www.paessler.com/manuals/prtg/notifications

Kind regards,
Andreas Günther
Tech Support, Paessler AG

[email protected]

Created on May 20, 2020 1:35:05 PM by  Andreas Günther [Paessler Support]

Last change on Jul 26, 2021 11:36:46 AM by  Maike Guba [Paessler Support] (2,404) 2 1

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.