Tried that already did not work.In Parental Controls, Time Scheduling? That won't work indeed. You are blocking extender's Internet access (it won't be able to sync the time, for example), but not Internet to clients connected to this extender.
I tried doing this and it still did not work. I am attaching a screenshot of the device I want to block.I believe that most WiFi extenders act as both a WiFi client and WiFi access point simultaneously. So you should be able to use MAC address filtering on the WiFi extender's MAC address to block it from accessing your WiFi network. Go to Advanced Settings --> Wireless --> Wireless MAC Filter --> Enable MAC Filter = ON for 2.4 GHz / 5.0 GHz radios (depending on which channel(s) the WiFi extender is connecting on) --> MAC Filter Mode = Reject --> Add the Client Name (MAC address) of the WiFi extender.
This screen shot indicates that the repeater is connected to your router/LAN using an Ethernet cable. If that is actually the case then you have an AP and not a repeater. In any case devices connected by Ethernet to your router can only be blocked by by scripting/iptables and there isn't a way to do this using the GUI.I tried doing this and it still did not work. I am attaching a screenshot of the device I want to block.
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