Fping ipv6 only devices no longer working?

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1

I believe our LibreNMS did its self update last night and ever since then our IPv6 only devices are being marked as down when they are not.

Version number is being reported as 25.10.0-dev.27+1d3c661aa - Fri Sep 26 2025 18:03:42 GMT-0500

If I capture the discovery process, I can see it is trying to run fping -4 and failing.

Did something change in this update with ICMP and fping? If I fping the device with the -6 option ( or no ip version option at all ) the server can successfully ping the device.

For now I disabled the ICMP check under the Ping configuration options and everything is “back to normal”, but that’s not ideal.

2

Update merged last night. Just taking a quick look but might have to roll it back.

3

Can you try this patch @Dan_Oachs

wget https://gist.githubusercontent.com/laf/8a971f3506b99a62ee6d8e49b8a989b0/raw/b9341ea21bff06a84c20a8063b6c575762c972bc/gistfile1.txt
git apply gistfile1.txt
4

Thanks! I believe that worked. I patched the file and did a quick capture of a Discover on a device that was failing the fping before and it now shows the correct fping -6 and passes.

5

Remove the patch and update, fix is in the main branch now:

git checkout app/Models/Device.php

./daily.sh

6

Updated any everything looks good.

Thanks!

7

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