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leiweibau / Pi.Alert

Scan the devices connected to your WIFI / LAN and alert you the connection of unknown devices. It also warns if a "always connected" device disconnects. In addition, it is possible to check web services for availability. For this purpose HTTP status codes and the response time of the service are evaluated.
https://leiweibau.net
GNU General Public License v3.0
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[Bug] Fixed MAC addresses are detected as "Random MAC" #311

Closed waywit closed 1 month ago

waywit commented 1 month ago

Is there an existing issue for this?

Current Behavior

I have different AVM FritzRepeater 2400, 3000 and 3000 AX in my network. All with fixed IPs over pi.hole DHCP MAC mappings, but they are all detected as "Random MAC". I also have this issue with some of my proxmox lxc and VMs, but some are detecxted correctly. I have no idea how this mechanism works and a random MAC is detected, so I have no idea what to change?!?!

Environment

Raspberry Pi 4 with 4 GB RAM and SSD boot drive, newly setup with actual RaspiOS together with a pi.hole installed. Pi.Hole is DHCP and DNS server in network. Fritzbox 7590 for internet access without DHCP.

Anything else?

Perhaps this is no Bug, but I have no Idea what I can do to remove these "Random Mac" badge, because of this I cannont use the Manufacturer field... :-( Perhaps someone can help me with that.

By the way, great piece of software and a lot better then the original version I used some years ago....

leiweibau commented 1 month ago

This is not a bug.

I have no idea how this mechanism works and a random MAC is detected, so I have no idea what to change

MAC address schemes are classified as "random" MAC addresses: x2:xx:xx:xx:xx:xx:xx x6:xx:xx:xx:xx:xx:xx xA:xx:xx:xx:xx:xx:xx xE:xx:xx:xx:xx:xx:xx

You can find out more about the background here (IEEE 802c local MAC address usage). https://en.wikipedia.org/wiki/MAC_address#Locally_administered_address

By the way, great piece of software and a lot better then the original version I used some years ago....

Thanks for the praise

leiweibau commented 1 month ago

Is marked here (https://github.com/leiweibau/Pi.Alert/issues/312) as a topic to be documented.