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

2 nas alternately connected



For our backups, we use 2 NAS that we connect alternately. When # 1 is online, # 2 is offline. This allows us to always have a backup offline in case we fall victim to a cryptolocker.
We put the 2 NAS in PRTG but as there is always one which is offline, it appears in error. Is there a solution to couple the 2 NAS considering that:
- if 1 out of 2 NAS is online = OK
- if the 2 NAS are online = error
- if no NAS is online = error

Thank you

alerts nas ping

Created on Sep 8, 2020 7:22:07 AM

Last change on Sep 8, 2020 7:34:45 AM by  Timo Dambach [Paessler Support]

1 Reply




It may be possible adding an additional factory sensor. Please also have a look at the "Define Sensor Status—status() Function"-section here.
Alternatively you can write a custom script to create a custom EXE sensor.

Created on Sep 8, 2020 7:39:01 AM by  Timo Dambach [Paessler 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.