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SNMP Trap Receiver, how do I receive notifications?

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I'd like to receive an email whenever my SNMP trap sensor receives a trap, but it seems it only goes into warning/error if the sensor goes down. I think the filter has something to do with it, but I'm really confused about the formulas. I put "any" in the Error Filter and it didn't seem to work.

prtg snmp snmp-sensor

Created on Sep 23, 2016 6:05:50 PM by  AllianceITSupport (0) 1



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Hello,
thank you for your inquiry.

To receive a notification, just add a trigger with a 0 seconds delay to the sensor. You must also make sure that you have the sensor's filters set-up so that the sensor goes into warning or error when specific conditions are met. These filters must comply with the filter rules syntax.

For more details please visit:

Best Regards,
Luciano Lingnau [Paessler Support]

Created on Sep 26, 2016 11:08:51 AM by  Luciano Lingnau [Paessler]



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Can you provide an example?

I have set the error filter to "source[IP] AND spectrap[0-1000]". I get an alert now, but the state never goes to down. I've set the state trigger to alert when it's down for 0 seconds.

Created on Sep 28, 2016 3:42:42 PM by  AllianceITSupport (0) 1



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Hello, thank you for your reply.

The syntax that you've mentioned looks correct:

source[IP] AND spectrap[0-1000]

Please confirm, did the sensor go down for one scanning interval when this trap was received? You can check that in the "Log" tab of the sensor.

If the sensor went down, it should also tell you whenever a notification was trigger. The trigger should be set-up like the following:

State TriggerWhen sensor state isDownfor at least0seconds performMy notification

The remaining options from the trigger can be ignored.


Best Regards,
Luciano Lingnau [Paessler Support]

Created on Sep 29, 2016 6:52:31 AM by  Luciano Lingnau [Paessler]



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My sensor doesn't go down, even when the trap is received. How do I configure email notifications in this case when the trap is received??

Created on Jan 28, 2021 8:31:55 PM by  mouni2693 (0)



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To configure Notifications you'll first need to add Notification Templates at "Setup > Account Settings > Notification Templates". Here you can define who and how should be notified. After that you can define Notification Triggers at the "Notification Triggers" tab of the sensor. Here you'll can define when and how often you want to get notifications. 

If the sensor doesn't go down/red despite of the above mentioned settings, feel free to send us screenshots of those settings and the "log"-tab of this sensor to [email protected] if you want us to take a closer look.

Created on Feb 1, 2021 11:03:40 AM by  Timo Dambach [Paessler Support]



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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.