NETGEAR Nighthawk X4S User Manual page 181

Nighthawk X4S AC2600 Smart WiFi Router
Many broadband ISPs restrict access by allowing traffic only from the MAC address of your broadband modem.
Some ISPs additionally restrict access to the MAC address of a single computer connected to that modem. If
your ISP does this, configure your router to "clone" or "spoof" the MAC address from the authorized computer.
Troubleshooting
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