Random Private MAC address

rmcrae — Tue, 30 Mar 2021 21:42:58 GMT

I use DHCP reservations to ensure the devices on my network get the same IP address every time. I have security and routing policies that depend on known IP addresses. Recently Apple, I’m sure other will follow, enabled a feature that by default that randomly selects a private MAC address when they lease an IP address. I realize that you can disable this feature on these devices but is there a way to prevent these random MAC addresses on the network in the first place? I’m looking for a solution that works from the networks point of view that doesn’t require me to black hole my Guest DHCP range. My device is a Palo Alto PA220.

I'm aware of several articles on the net like: https://knowledgebase.paloaltonetworks.com/KCSArticleDetail?id=kA14u000000HAutCAG

Re: Random Private MAC address

BPry — Wed, 31 Mar 2021 02:31:33 GMT

@rmcrae,

You can't do this directly via your firewall using the built-in DHCP server no.

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Random Private MAC address

Re: Random Private MAC address