From the course: CISSP Cert Prep (2021): 4 Communication and Network Security

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Firewall rule management

Firewall rule management

From the course: CISSP Cert Prep (2021): 4 Communication and Network Security

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Firewall rule management

- [Instructor] Network firewalls play a crucial role in an organization's overall security posture. They protect the perimeter of the network, blocking any traffic that is not explicitly authorized on the network. Firewalls keep potential attackers at bay, limiting the possibility that they will gain unauthorized access to a protected network. The basic function of a firewall is quite simple. Each time someone outside the protected network attempts a new connection into the protected network, the firewall consults a list of rules maintained by the administrator. If it finds a rule that matches the description of the attempted connection, it then follows the action specified by that rule. If the firewall doesn't have instructions for the situation, it follows the default deny principle and blocks the traffic. For example, we might have a firewall rule base for a simple network that contains these three rules. First, it…

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