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Ask Slashdot: Best Way To Isolate a Network And Allow Data Transfer?

Futurepower(R) writes: What is the best way to isolate a network from the internet and prevent
intrusion of malware, while allowing carefully examined data transfer
from internet-facing computers? An example of complete network isolation could be that each user would have two computers with a KVM switch and a monitor and keyboard, or two monitors and two keyboards. An internet-facing computer could run a very secure version of Linux. Any data to be transferred to that user’s computer on the network would
perhaps go through several Raspberry Pi computers running Linux; the computers
could each use a different method of checking for malware. Windows computers on the isolated network could be updated using Autopatcher, so that there would never be a direct connection with the internet. Why not use virtualization? Virtualization does not provide enough separation; there is the possibility of vulnerabilities. Do you have any ideas about improving the example above?

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