Which PCI DSS requirement involves using a firewall configuration?

The requirement that involves using a firewall configuration is associated with building and maintaining a secure network and systems. Firewalls are crucial components of network security, serving as barriers that monitor and control incoming and outgoing network traffic based on predetermined security rules. This helps to protect sensitive information, such as cardholder data, from unauthorized access and attacks.

Maintaining a strong network configuration includes implementing firewalls to ensure that only legitimate traffic is allowed, effectively minimizing the risk of data breaches and enhancing overall system security. The PCI DSS emphasizes the importance of a secure network, which encompasses not just the presence of firewalls, but also ensuring they are properly configured and updated in accordance with best practices and organizational security policies.

Other requirements, while important, focus on different aspects of security, such as access controls, protecting stored data, and having an overarching information security policy, but they do not specifically address firewall configurations as part of the network security measures.