If you're looking for a way to secure your data or funds, an air-gapped computer is a great option. Here's a simple guide on how to set one up.
Secure the Room
Wherever you store your air-gapped computer, make sure to secure the room. Only people you want using the machine should be in there.
For everyone else, it's best they. Treating your air-gapped machine like this will lessen the risk of any potential attacks or breaches.
The room should be locked down and have minimal equipment.
That includes other unnecessary electronics. If a printer, phone, or tablet does not need to be in that room, remove it.
With a laptop, it's easier to grab it and go. But if you prefer to have a computer stay in the room, it needs to be kept cool.
The room should be the ideal climate for the computer so it doesn't overheat.
If the computer breaks down and you have to throw it out, there's a still chance someone could pull info off it.
Remove Things
Disable any unnecessary ports. You will need a few to plug up a USB drive or mouse, but the rest can be disabled.
Any other unused USB port can be blocked with a USB port blocker. Or if you have the time, just remove the post altogether.
Next, eliminate all methods of networking possible. That includes WiFi, Ethernet, and Bluetooth.
Windows computers have settings that allow you to disable them. For Windows users, use Device Manager.
Open Device Manager by searching for it in the search bar, or by typing the devmgmt.msc command.
Right-click on the device you want to disable and go to. Properties > Driver > Device.
But if you want a machine that's truly offline, it's best to remove the ethernet, wireless, and Bluetooth ports entirely.
Wrapping Up
Your air-gapped computer needs to be separate from your other devices.
Only authorized people should have access to it. Lock the device up at all times when not in use.
Keep the computer in a cool environment and remove any unnecessary electronics.
Disable and remove all unnecessary ports - USB, Ethernet, WiFi, and Bluetooth.
If you don't want to deal with an air-gapped computer yourself, there are options out there.
Framework laptops allow you to build basic machines. You can build a computer with all the components taken out.
