RS300, access control not working

giubeca wrote:

two devices already connected are blocked and there is no way to allow the connection

Page 57 of the user manual explains how to specify new devices which should be allowed to access the network.

https://www.downloads.netgear.com/files/GDC/RS300/RS300_RS280_UM_EN.pdf

i.e.

• Learn the hardware MAC address of the device.  (being careful to set WiFi devices to use their hardware MAC address rather than 'randomize' a MAC address)
• Disconnect the device from the network and wait for the Access Control page to update showing that it is not connected.
• "Add" a device to the 2nd table (Allowed devices which are not currently on the network)
• Check the 3rd table to see if that device has been recorded as a Blocked device.  If so, delete it from Table 3.
• Check "Apply" at the top of the page to make the changes take effect.
• Connect the device to the network.

This cumbersome process is a consequence of wanting to keep new devices from connecting to the network.  (and one of the reasons I decided YEARS ago not to enable Access Control.  Imagine.... someone comes over and wants to show me something on their smartphone/tablet/laptop.  "What's your WiFi password?"  WAIT... I have to go ALLOW your device on my network.  What's the MAC address?  Is it an iPad that has randomized MAC?  What's that?  ........ Never mind, I've lost interest.)

ok, I'll try. Thanks

The network configuration is the same as all my other devices

Tried using the NH app to control each device?