How to prevent DHCP server to assign IP for specific clients?

[newsettler_AI]

I need connect 2-4 hardware devices and laptop to ESP32 over ethernet. I have code that run dhcp server, but there is one problem.
I don't want ESP32 give any IP to laptop (but still able to give it to other hardware devices).
Any tips how to do this? Probably some MAC filtration required? This first thing come in my mind.

[ESP_ondrej]

Is your laptop Linux or Windows OS? Where is the DHCP server hosted? On that laptop, router or ESP device?