Security, Identity, and Compliance
CoreEgress-only internet gateways
Explicit IPv6 VPC egress configuration.
Key points
- An egress-only internet gateway provides outbound-initiated IPv6 internet access without serving as an IPv4 NAT path.
Best-known use cases
- D4.1, D4.2, and D5.1: route the named private IPv6 egress flow through the appropriate outbound-only gateway.
What candidates often confuse it with
- Egress-only internet gateways apply to IPv6; NAT gateways are the common private IPv4 egress path.
Key takeaway
Match the gateway and route to the address family before changing filters.
Related services
- AWS Certificate Manager (ACM)
- Amazon EC2 security groups
- Elastic Load Balancing (ELB)
Relevant exam tasks
- D4.1 — Task 4.1: Implement and manage security and compliance tools and policies.
- 4.1.1 — Implement IAM features (for example, password policies, multi-factor authentication [MFA], roles, federated identity, resource policies, policy conditions).
- D4.2 — Task 4.2: Implement strategies to protect data and infrastructure.
- 4.2.1 — Implement and enforce a data classification scheme.
- D5.1 — Task 5.1: Implement and optimize networking features and connectivity.
- 5.1.1 — Configure a VPC (for example, subnets, route tables, network ACLs, security groups, NAT gateways, internet gateway, egress-only internet gateway).