Solve : Disabling secondary router (repeater)?

1.	Solve : Disabling secondary router (repeater)?
Answer» My ROUTER is main. Neighbour have secondary router, and he USES it to steal my internet ( same HOUSE ) Is there any possiible way... to fill something in router settings- to MAKE repeater unable to access internet?Change your WiFi password and set it to use WPA2 security. With a secure enough password (make it COMPLETELY random) it will be practically impossible for them to connect.

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