ntopng VS Snipe IT

and use software: https://www.ntop.org/

InfluxDB 2.0 Support (ntopng github)

For what it's worth, there used to be a package in many Linux repositories called "ntop" [1] but became less popular when they went commercial. There is still a community version but I have no idea how popular it is any more. It was quite popular prior to projects like PiHole. Perhaps the older ntop has fallen out of favor so maybe there won't be any confusion.

[1] - https://www.ntop.org/

Have you seen https://github.com/ntop/ntopng?

NTOP -- Traffic Analysis.

One of the comments suggests using a managed switch that supports port mirroring, and installing a Flow collector on the connected system. Google netflow collector for software options. Something like ntop may work. See... HowTo Monitor Traffic in SMEs and Home Networks: A Primer

What can I do to implement GeoIP support into ntopng? The instructions I found on the internet (e.g. https://github.com/ntop/ntopng/blob/dev/doc/README.geolocation.md) did not seem to fit the case.

Snipe-IT for Asset Management

At work I use snipeIT to manage our asset inventory, it's fairly quick to spin up with docker and it's quite customisable https://snipeitapp.com/

Another great open source asset management system to check out is Snipe-IT. https://github.com/snipe/snipe-it

I have used it for years both self hosted and with them hosting and it's been a great low cost solution for asset management.

If you like the IT method of asset management, then Snipe-IT is what you want. If you want something more inventory-y and parts-y, then check out PartKeepr or Inventree.

We use SnipeIT

I very strongly disagree, use serial numbers if at all possible, set up Snipe-IT, and you'll never have to change labels again. As long as you are the one handling provisioning, repairs and such, or those who do is allowed access, you'll always know the location, status and ownership of everything in there.