MAC Filter for LAN clients? or DHCP?

Hardware Questions and Recommendations
1

Why isn't this a thing? Anyone know how to implement this?

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Because

  • LAN clients don't "authenticate" with anything like 802.11 clients do
  • LAN clients' traffic doesn't go through the router in many/most situations
  • A client can set its own MAC address and IP, without DHCP
  • MAC filtering provides virtually no security above IP filtering (which isn't very strong)

This is handled in enterprises with techniques like 802.1X port authentication.

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