In firewall architecture, what does a Router with ACLs do?

A router with Access Control Lists (ACLs) is designed to control network traffic by applying specific rules to the packets that it processes. These ACLs define what traffic is allowed to pass through the router based on characteristics such as source and destination IP addresses, protocols, and port numbers. This means that the router not only routes traffic but also enforces security policies by permitting or denying certain types of traffic according to the rules configured in the ACLs.

This functionality is key to maintaining security within a network, allowing administrators to manage access to network resources and to prevent unauthorized traffic. The router thus becomes a crucial part of the network security architecture, as it proactively manages the flow of data, ensuring that only compliant traffic is allowed to traverse the network.

The focus on controlling traffic based on defined rules enables organizations to implement security measures that align with their specific policies and risk management strategies, making the router with ACLs an important component of network security management.