You're right, most traditional Wi-Fi access points (APs) don't offer the functionality of blocking by default and allowing by exception for MAC addresses within an SSID (Service Set Identifier). However, there are alternative approaches to achieve a similar outcome. ny state of health MAC Filtering with Open Network (Least Secure) This method involves creating an open Wi-Fi network (no password) and restricting access only to authorized MAC addresses through the router/access point's settings. This approach is not recommended for secure environments as anyone can connect and potentially see network traffic if they have the authorized device's MAC address. ... View more