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ESET Cybersecurity Tips & Tricks: Firewalls and how they work

The firewall creates a virtual wall around the company's network, acting as a security guard on any traffic that wants to come in, keeping all the internal company assets safe and authorizing permitted visitors access. There may also be a semi-trusted area called a de-militarized zone, a DMZ. This is a controlled place area for things that are not completely trusted, or it is where you allow visitors to come into the network but not fully.

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