3.2 Design and implement network security controls. - This episode delves into designing and implementing network security controls for AWS environments, drawing from the AWS Certified Security - Specialty exam guide. Listeners will learn how to architect secure, scalable cloud networks that leverage VPC-centric defenses, network segmentation, and least-privilege principles to mitigate risks like unauthorized access and data exfiltration. We explain key AWS security mechanismssuch as security groups, network ACLs, AWS Network Firewall, and VPC endpointsand how they interplay to create layered protection for both simple and complex cloud architectures. The discussion also covers secure inter-VPC and on-premises connectivity, the importance of VPNs and Direct Connect for hybrid deployments, and best practices for redundancy and high availability in critical workloads. Emphasis is placed on using telemetry sources like VPC Flow Logs and Traffic Mirroring for proactive monitoring, threat detection, and compliance auditing. Finally, we outline the importance of automating network access reviews, managing changes with infrastructure-as-code and centralized tools, and aligning network controls with evolving security requirements to ensure both robust defense and operational agility.

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