Disabling your Connection Go to Control Panel/Network and Sharing Center and from the left hand window open the Network Adapter Settings. And chose your connection to which you are connected, open it and there you'll see its properties and status. Click on “Disable” to make it disable.
Is it possible to disable the internet?
You can dam or divert individual streams, but it is virtually impossible to block them all at once, because the water always tries to find a new route downhill. Likewise, the internet is a huge and complex structure operated by a mixture of government and commercial bodies – as well as billions of private individuals.
How do I block internet but allow LAN?
To block the internet while allowing connections to an internal network you need to create a 'Global Rule' under 'Advanced Firewall Settings'. You should also password protect your configuration to prevent others from altering it.