FR for OctoPrint (for networks with Netgear in them)

If you own a Netgear router which includes the Genie network mapper, then this router will send out promiscuous requests to every IP address on your network, port 80, "/currentsetting.htm". If it gets back a response, then it updates its discovery map and then... stops pestering the host.

If the host doesn't respond, then it will be asked again and again to process/ignore these annoying requests until the end of time.

It's annoying, but one strategy might be to create a one-line response to the route "/currentsetting.htm" with contents such as:

Model=OctoPrint

As a benefit, anyone with a Netgear-based router would have more information about the IP and MAC address of their Raspberry Pi.

Querying an actual Netgear router:

curl http://10.20.30.1/currentsetting.htm

Firmware=V2.02.18
RegionTag=C3000_NA
Region=us
Model=C3000
InternetConnectionStatus=Up
ParentalControlSupported=1
SOAPVersion=2.0
ReadyShareSupportedLevel=1
LoginMethod=1.0

rather makes me glad I flashed a custom firmware to my router, netgear's router management is total pants.

You could also just RP with NginX and drop in a static response to do the same thing.