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

Watchguard Firebox M300




We have a WatchGuard Firebox M300 which we wish to monitor via PRTG. We've followed this setup guide https://p.widencdn.net/in4vq3/PRTG-RMM-Integration-Guide.

I'm new to PRTG and could do with a little help with two sensors not working

One sensor is for Firebox Device name which reports FireboxM300 is not a valid integer value One sensor is for Firebox Device version which reports sysa:11.11.4.B514824> <sysb:11.9.6B475461>' is not a valid integer value

Could anybody help with these two problems?


name snmp version watchguard

Created on Jul 3, 2018 7:20:39 AM

2 Replies

Accepted Answer



Hello there,

Thanks for your inquiry, we appreciate your contact regarding this matter!

The Sensor you are using here is a SNMP Custom Sensor that expects a single numerical value (int64) for a given OID as result. The results "FireboxM300" and "sysb:11.9.6B475461" are no integer, so the error message is displayed in PRTG.

In order to check a string you can use our SNMP Custom String Sensor which displays these results correctly.

For any further questions or issues, we're glad to help.

Kind regards,
Birk Guttmann, Tech Support Team

Created on Jul 3, 2018 7:36:15 AM by  Birk Guttmann [Paessler Support]

Last change on Jul 3, 2018 7:51:38 AM by  Birk Guttmann [Paessler Support]



Hi Birk

Thank you for the swift response, that worked. I must have mis-read the instructions.

All working, have a good day


Created on Jul 3, 2018 7:44:58 AM

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.