If you spot a device on your network that shouldn’t be there, you can block it from accessing the internet by removing it from the connected devices list.
For iOS users, start by tapping the devices tab to view the list of connected devices. Devices will be grouped by category, with recently connected ones listed at the bottom.
To block a device, tap on it, then click the circle with 3 dots in the top right corner, this will show you two options, Block or Pause Device.
Blocked devices will be listed in a new section at the bottom of the devices screen. To unblock a device and restore its network access, simply tap on it in this list.
Note: Device blocking is not available when your system is in bridge mode.