NETGEAR Nighthawk X4S - Page 181

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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Nighthawk X4S AC2600 Smart WiFi Router