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Sometimes you may notice that WiFi Guard reports one MAC address for all devices behind a wireless range extender or repeater. In this case it would look like the devices have different IP addresses, yet the same MAC address.

A range extender typically hides devices behind itself and does not retain their MAC addresses. You can type arp -a in a command prompt and observe the same behaviour. This is not a bug in WiFi Guard.

One way around this issue would be to enable the WDS mode (Wireless Distribution System). The advantage of WDS is that it preserves the MAC addresses of client frames across links between access points. The drawback of WDS is that devices from different vendors may not be compatible with each other.

Related articles:

WiFi Guard doesn't see some or any devices on my network
Why a known device may later become unrecognised

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