Go to Start > Control Panel > Network and Internet > Network and Sharing Center. In the left-hand column, click Change adapter settings. A new screen will open with a list of network connections. Right-click Local Area Connection or Wireless Connection and select Disable.
Prevent web content:
Go to Settings > Screen Time. Tap Content & Privacy Restrictions and enter your Screen Time passcode. Tap Content Restrictions, then tap Web Content. Choose Limit Adult Websites, or Allowed Websites Only.
How do I block Internet access on a device?
To learn how, follow the steps below:
Access your Linksys Smart Wi-Fi Account. ...
Click on Parental Controls in the left panel.
Select the device that you want to restrict access from the Restrict Internet access on list.
Select Always in the Block Internet access box.
Click the Ok button at the bottom of the window.