Managing a mesh network like the TP-Link Deco M4 requires a balance between seamless connectivity and robust security. One of the most direct ways to control who (or what) joins your network is through , which functions as a digital gatekeeper . On the Deco M4, this is primarily managed through the Access Control feature within the mobile app or web interface. Understanding Filtering Modes

In a household with many guests or new devices, managing the list can become tedious.

: Prevents specific devices from connecting. You can select currently connected clients or manually enter a MAC address.

Choose to manually enter the unique identifier for a device that isn't connected yet. Method 2: Using the Web Interface

: Community feedback has historically highlighted that whitelisting was missing on many Deco models, forcing users to rely solely on blacklisting. Check for the latest firmware updates (such as version 1.4.1 or higher for similar models) to ensure you have the full "Allow List" functionality.

The Deco M4 offers two primary modes for managing device access based on their unique Media Access Control (MAC) addresses:

Choose to pick from devices currently online.

High-security setups where no unknown device should ever connect.