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I have two active network interfaces on my machine connected to two different subnets.

I run Apple Remote Desktop Admin to administer hosts on only one of the two subnets.

How do I restrict Apple Remote Desktop Admin and Client to broadcast from only one network interface?

Or,

How do I block incoming traffic from the ports Apple Remote Desktop Admin and Client use (TCP 3283, 5900) on the interface connected to the subnet I don't want to hear from?

I have looked into Murus Firewall (successor to IceFloor 2) but I don't really need any of the many other features that software offers.

If I could achieve what I want with the built-in firewall controls that would be great.

I'm running OS 10.13.4. Any help would be greatly appreciated!

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