Implementing security groups, NACLs, and AWS Network Firewall
Continuing our journey through this chapter, let’s focus on the effective implementation of security groups, NACLs, and AWS Network Firewall. These three components are pivotal in ensuring robust protection of your resources within your VPCs, each playing a distinct role in managing and filtering network traffic. In this section, we will clarify their roles, interactions, differences, and overlaps, and provide guidelines for their effective implementation.
First, let’s demystify these three mechanisms:
- Security groups: These act as virtual firewalls at the ENI level for AWS resources within a VPC, managing both inbound and outbound traffic. Unlike traditional host-based firewalls that are implemented within the operating system (OS), security groups are managed through the AWS management plane, providing enhanced security by being less susceptible to compromise. Security groups are stateful, allowing...
