In the event that someone connected using our password, they would not have access to the network. One way to configure it would be to add our MACs and we put that only those can be connected. In some routers in the Wi-Fi section we have MAC filtering available, although in terms of security it is not much use, we could enable it to put a small barrier to someone who wants to access the network.

Configure a DHCP, such as, for example, to assign a local IP that is always the same to a specific MAC.

Configure bandwidths and priorities on the router.

Thus, knowing the MAC of a device we could: And if you make your device forget the network, it will also forget the private address it used with that network, unless it has been less than 2 weeks since the last time it was made to forget that network.The MAC allows us to identify a specific computer always and at all times, regardless of the IP it has at that time since it is unique for each device.

Starting with iOS 15, iPadOS 15, and watchOS 8, if your device hasn’t joined the network in 6 weeks, it uses a different private address the next time it connects to that network.

If you erase all content and settings or reset network settings on the device, your device uses a different private address the next time it connects to that network.

In some cases, your device will change its private Wi-Fi address: This unique MAC address is your device's private Wi-Fi address, which it uses for that network only. Starting with iOS 14, iPadOS 14, and watchOS 7, your device improves privacy by using a different MAC address for each Wi-Fi network. This allows a kind of user tracking or profiling, and it applies to all devices on all Wi-Fi networks. If the device always uses the same Wi-Fi MAC address across all networks, network operators and other network observers can more easily relate that address to the device's network activity and location over time. To communicate with a Wi-Fi network, a device must identify itself to the network using a unique network address called a Media Access Control (MAC) address.

How to convert mac address wifi