Each managed access point and its wireless router provides a basic type of access control for connected devices. Enabling MAC filtering on an access point allows you to specify a list of permitted and restricted devices that can, and cannot, connect to the access point. However, there are techniques, all of which were covered in the previous chapter, that allow a penetration tester to capture a list of authorized devices (their MAC addresses) and perform spoofing to gain unauthorized access. However, this feature should still be applied, since having some sort of security is better than having no security at all on your network.

In the next section, we will cover the concept of power levels in antennas.