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Unknown MAC addresses

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Unknown MAC addresses

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Unknown MAC addresses
Unknown MAC addresses
2023-03-14 22:37:25
Tags: #MAC
Model: EAP670   EAP660 HD   SG2008P  
Hardware Version: V1
Firmware Version: 1.0.6 / 1.1.1 / 1.07

I have various unknown MAC addresses that end in 00-00-02 or a variation of.  They ramdomly show up and do not have an IP address assigned, are always on the main LAN, and use no data. They are NOT Apple devices, but I they might have something to do with Bonjour. They always show up as a wired device. Most of the time they are connected to Port 1 of the SG200P - which is connected to the EAP670. However, once in a while, I will see them on Port 2 which is a EAP660. I have moved the EAPs to different ports and the MACs follow which tells me this is something to do with the EAPs. Here are a couple of examples:

 

D4-9C-81-00-00-02

92-45-81-00-00-02

92-45-81-00-20-02

 

Any idea as to what these are? and is there a way to hide them? 

 

Thank you

Chris
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Re:Unknown MAC addresses
2023-03-16 07:06:38

  @CFB25 The MAC addresses ending in 00-00-02 or a variation may be a sign of an active service discovery protocol being used on your network, such as Bonjour. It is possible to hide them by disabling the associated service in your router's settings. I suggest consulting your manufacturer's documentation for more specific instructions.

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Re:Unknown MAC addresses
2023-03-24 22:19:08

  @PhilipMatrix Thank you confirming.! 

Chris
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Re:Unknown MAC addresses
2023-03-25 02:01:13 - last edited 2023-03-25 02:29:08

  @CFB25 

 

I would be concerned seeing a MAC address on my network that I cannot identify, especially when it is wired. Are those APs installed in secure locations? Is it possible that somebody can disconnect them and connect his/her own device to get access to your network? Note that new wireless devices often generate random MAC addresses, but you should be still able to identify them.

Kris K
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