This session from AWS re:Inforce 2023 provides an in-depth look at firewalls and their optimal placement within cloud architectures. AWS solution architects Ivo Pinto and Tzoori, along with Buzor Okoye from Workday, discuss various firewall types including security groups, network ACLs, AWS Network Firewall, and AWS WAF. They explore centralized vs. distributed deployment models, inbound and outbound traffic control, and considerations for different application types. The speakers emphasize the importance of multi-layered security, starting protection at the edge, and using tools like AWS Firewall Manager for centralized control. Workday shares their journey of evolving their firewall architecture in AWS, highlighting the benefits of managed services like AWS Network Firewall. The session concludes with key takeaways on implementing effective firewall strategies in AWS environments.