Adding certain devices to the white list, is it possible?

[Bundy]

Is it possible for certain IP/MACs on some computers to bypass the Pi-hole block and browse or connect freely?

I suspect that I may have certain list or domain incompatibilities with some of my home automation issues, although no problems have arisen to date and they have been connected under Pi-hole as a DNS server, after a disconnection, for whatever reason, Some computers have had or have serious problems reconnecting to the local network.

As it is more difficult to determine what requests they make, perhaps it is best to exclude them from the block if possible, since they are blind computers that can collect little information beyond their operation and you do not browse with them, so it does not matter.

[chrislph]

@Bundy

Is it possible for certain IP/MACs on some computers to bypass the Pi-hole block and browse or connect freely?

Yes, I do this with a couple of devices. See this post.

Some devices, such as newer iPhones, will do MAC address randomisation, where it will create a fake MAC address for each network. If so, you might struggle to find it in the Clients section. On the iPhone you can disable these on a per-network basis, so you could turn it off at home and then whitelist it with its actual MAC address.