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Review origin group priority, response status, origin health, failover criteria, request method and edge access logs. These checks are primarily associated with CloudFront origin groups and failover behavior; they are less discriminating for this case. The relevant checks are: Inspect metric dimensions, statistic, evaluation windows, missing-data treatment, alarm actions and correlated service health. Scenario: A VPN metric periodically stops publishing and an alarm configured to ignore all missing periods never warns operators of a loss of visibility.

Examine Connect peer IPs, GRE tunnels, BGP neighbors, Transit Gateway associations and propagated routes. These checks are primarily associated with Transit Gateway Connect integration for SD-WAN; they are less discriminating for this case. The relevant checks are: Inspect metric dimensions, statistic, evaluation windows, missing-data treatment, alarm actions and correlated service health. Scenario: A VPN metric periodically stops publishing and an alarm configured to ignore all missing periods never warns operators of a loss of visibility.

Correlate CloudFront request IDs, ALB access log fields, DNS query logs, origin response times and encrypted log retention. These checks are primarily associated with ELB CloudFront and Route 53 log correlation; they are less discriminating for this case. The relevant checks are: Inspect metric dimensions, statistic, evaluation windows, missing-data treatment, alarm actions and correlated service health. Scenario: A VPN metric periodically stops publishing and an alarm configured to ignore all missing periods never warns operators of a loss of visibility.

Data-center clients can resolve the intended AWS private names while unrelated public resolvers still do not publish those records. That result supports Resolver inbound endpoint for AWS private zone access but does not establish the requested networking outcome here. Instead verify: A precisely scoped application exchange succeeds without pretending overlapping private routes can coexist unmodified in one TGW routing domain. Scenario: A team keeps an overlapping on-premises CIDR and advertises identical prefixes into a TGW, causing unpredictable destination selection.

The VIF establishes layer-two and layer-three adjacency and exchanges only authorized networks with no VLAN collision. That result supports Direct Connect LOA VLAN and BGP bring-up but does not establish the requested networking outcome here. Instead verify: A precisely scoped application exchange succeeds without pretending overlapping private routes can coexist unmodified in one TGW routing domain. Scenario: A team keeps an overlapping on-premises CIDR and advertises identical prefixes into a TGW, causing unpredictable destination selection.

Intended private traffic crosses directly peered VPCs without accidental internet ingress or assumed transitivity. That result supports VPC peering routes and security controls but does not establish the requested networking outcome here. Instead verify: A precisely scoped application exchange succeeds without pretending overlapping private routes can coexist unmodified in one TGW routing domain. Scenario: A team keeps an overlapping on-premises CIDR and advertises identical prefixes into a TGW, causing unpredictable destination selection.

Gate network IaC deployment on route reachability tests, reviewed changes, canary application checks and documented rollback with independent health metrics. That approach addresses Safe network change rollout and rollback automation instead of the principal requirement here. A valid IaC template does not guarantee a live network route works; static reachability analysis should be complemented by runtime tests. The better fit for this scenario is: Detect network drift from declared infrastructure using CloudFormation drift detection, AWS Config and controlled reconciliation before applying corrections. Scenario: A production subnet route is modified during an incident, but the Git-owned IaC template still declares the earlier path and no drift audit notices.

Model reusable VPC and routing constructs with AWS CDK while keeping account/Region-specific values and synthesized CloudFormation templates reviewed. That approach addresses AWS CDK network configuration and environment context instead of the principal requirement here. CDK synthesis generates infrastructure templates; application code passing unit tests does not alone prove a network change is safe at deploy time. The better fit for this scenario is: Detect network drift from declared infrastructure using CloudFormation drift detection, AWS Config and controlled reconciliation before applying corrections. Scenario: A production subnet route is modified during an incident, but the Git-owned IaC template still declares the earlier path and no drift audit notices.

Connect appropriate private or transit VIFs through a Direct Connect gateway and supported gateway associations, enforcing allowed prefixes and account boundaries. That approach addresses Direct Connect gateway and association limits instead of the principal requirement here. A Direct Connect gateway is a routing association construct; it does not automatically permit every VPC or encrypt link traffic. The better fit for this scenario is: Detect network drift from declared infrastructure using CloudFormation drift detection, AWS Config and controlled reconciliation before applying corrections. Scenario: A production subnet route is modified during an incident, but the Git-owned IaC template still declares the earlier path and no drift audit notices.

Inspect web ACL associations, rate rules, sampled requests, managed rules, Shield signals and legitimate-client false positives. These checks are primarily associated with AWS WAF Shield and application threat boundaries; they are less discriminating for this case. The relevant checks are: Review organizational scope, policy type, resource inclusion, remediation state, compliance findings and delegated administrator status. Scenario: A new AWS account launches an internet-facing application without the corporate WAF policy because the organization's Firewall Manager scope excludes it.

Inspect log group permissions, filter pattern, metric namespace and dimensions, alarm window, delivery and event correlation. These checks are primarily associated with CloudWatch log metric filters and cross-source alert correlation; they are less discriminating for this case. The relevant checks are: Review organizational scope, policy type, resource inclusion, remediation state, compliance findings and delegated administrator status. Scenario: A new AWS account launches an internet-facing application without the corporate WAF policy because the organization's Firewall Manager scope excludes it.

Verify record format, start/end aggregation periods, flow direction, tcp-flags, action, log-status and delivery permissions. These checks are primarily associated with Custom VPC Flow Log fields and aggregation limits; they are less discriminating for this case. The relevant checks are: Review organizational scope, policy type, resource inclusion, remediation state, compliance findings and delegated administrator status. Scenario: A new AWS account launches an internet-facing application without the corporate WAF policy because the organization's Firewall Manager scope excludes it.

Check key-signing key state, DNSKEY and DS chains, validator responses, zone type and registrar delegation records. These checks are primarily associated with Route 53 DNSSEC signing and resolver trust; they are less discriminating for this case. The relevant checks are: Correlate API eventName/principal/time/resource, Flow Log ENI/action/ports, affected route table and change records. Scenario: A VPC Flow Log record indicates REJECT and auditors mistake that action for evidence of a denied IAM API operation.

Review organizational scope, policy type, resource inclusion, remediation state, compliance findings and delegated administrator status. These checks are primarily associated with AWS Firewall Manager organization-wide audit; they are less discriminating for this case. The relevant checks are: Correlate API eventName/principal/time/resource, Flow Log ENI/action/ports, affected route table and change records. Scenario: A VPC Flow Log record indicates REJECT and auditors mistake that action for evidence of a denied IAM API operation.

Check mirror sources and filters, target health, capture timeline, packet identifiers, access logging and retention approvals. These checks are primarily associated with Traffic Mirroring forensic capture access governance; they are less discriminating for this case. The relevant checks are: Correlate API eventName/principal/time/resource, Flow Log ENI/action/ports, affected route table and change records. Scenario: A VPC Flow Log record indicates REJECT and auditors mistake that action for evidence of a denied IAM API operation.

Apply least-privilege security groups to ENIs and deliberate subnet network ACL rules while accounting for stateful return behavior and stateless ephemeral ports. That approach addresses Stateful security groups and stateless network ACLs instead of the principal requirement here. Security groups are stateful and NACLs stateless; a NACL must explicitly allow required traffic directions and ephemeral return ports. The better fit for this scenario is: Configure supported AWS Site-to-Site VPN encryption with IKE/IPsec parameters, approved customer-gateway algorithms and monitored tunnel state for hybrid traffic. Scenario: An enterprise assumes that its dedicated Direct Connect cross-connect encrypts database traffic and an audit requires proof of IPsec confidentiality.

Configure DNSSEC on supported public Route 53 hosted zones and maintain correct registrar DS delegation, distinguishing signing from transport encryption. That approach addresses Route 53 DNSSEC signing and resolver trust instead of the principal requirement here. DNSSEC supplies DNS data origin authentication/integrity, not confidentiality; Route 53 private hosted zones are not public DNSSEC-signing zones. The better fit for this scenario is: Configure supported AWS Site-to-Site VPN encryption with IKE/IPsec parameters, approved customer-gateway algorithms and monitored tunnel state for hybrid traffic. Scenario: An enterprise assumes that its dedicated Direct Connect cross-connect encrypts database traffic and an audit requires proof of IPsec confidentiality.

Use ACM Private Certificate Authority where appropriate for private PKI and managed service-to-service TLS identities with restricted issuance and rotation. That approach addresses AWS Private CA service-to-service TLS and rotation instead of the principal requirement here. Private certificates require clients to trust the issuing CA; owning a certificate file does not establish secure identity without hostname and chain validation. The better fit for this scenario is: Configure supported AWS Site-to-Site VPN encryption with IKE/IPsec parameters, approved customer-gateway algorithms and monitored tunnel state for hybrid traffic. Scenario: An enterprise assumes that its dedicated Direct Connect cross-connect encrypts database traffic and an audit requires proof of IPsec confidentiality.

Combine CloudTrail API activity with VPC Flow Logs metadata to investigate who changed network resources and how traffic behaved afterward. That approach addresses CloudTrail control-plane events versus Flow Logs traffic evidence instead of the principal requirement here. CloudTrail records API activity and Flow Logs summarize network flow metadata; neither alone proves application payload success. The better fit for this scenario is: Use ACM Private Certificate Authority where appropriate for private PKI and managed service-to-service TLS identities with restricted issuance and rotation. Scenario: An internal proxy uses a private certificate but client containers do not trust its root CA and reject all TLS handshakes.

Configure supported AWS Site-to-Site VPN encryption with IKE/IPsec parameters, approved customer-gateway algorithms and monitored tunnel state for hybrid traffic. That approach addresses IPsec Site-to-Site VPN for network encryption instead of the principal requirement here. Encrypted tunnels protect traffic on their encapsulated path; an unencrypted Direct Connect physical link by itself does not fulfill an IPsec requirement. The better fit for this scenario is: Use ACM Private Certificate Authority where appropriate for private PKI and managed service-to-service TLS identities with restricted issuance and rotation. Scenario: An internal proxy uses a private certificate but client containers do not trust its root CA and reject all TLS handshakes.

Enforce HTTPS viewer policies and origin protocol policies on a CloudFront distribution, using trusted origin certificates and least-privilege origin access. That approach addresses CloudFront HTTPS policies and origin security instead of the principal requirement here. Redirect-to-HTTPS at the viewer edge does not prove CloudFront is also using HTTPS to the origin. The better fit for this scenario is: Use ACM Private Certificate Authority where appropriate for private PKI and managed service-to-service TLS identities with restricted issuance and rotation. Scenario: An internal proxy uses a private certificate but client containers do not trust its root CA and reject all TLS handshakes.

Inspect GWLBe subnet routes, GWLB target health, GENEVE tunnel behavior, appliance state and AZ-specific return paths. These checks are primarily associated with Gateway Load Balancer centralized inspection and symmetry; they are less discriminating for this case. The relevant checks are: Check mirror sources and filters, target health, capture timeline, packet identifiers, access logging and retention approvals. Scenario: An engineer selects an ENI source not supported for Traffic Mirroring and concludes that no attack traffic exists when captures remain empty.

Correlate API eventName/principal/time/resource, Flow Log ENI/action/ports, affected route table and change records. These checks are primarily associated with CloudTrail control-plane events versus Flow Logs traffic evidence; they are less discriminating for this case. The relevant checks are: Check mirror sources and filters, target health, capture timeline, packet identifiers, access logging and retention approvals. Scenario: An engineer selects an ENI source not supported for Traffic Mirroring and concludes that no attack traffic exists when captures remain empty.

Inspect log group permissions, filter pattern, metric namespace and dimensions, alarm window, delivery and event correlation. These checks are primarily associated with CloudWatch log metric filters and cross-source alert correlation; they are less discriminating for this case. The relevant checks are: Check mirror sources and filters, target health, capture timeline, packet identifiers, access logging and retention approvals. Scenario: An engineer selects an ENI source not supported for Traffic Mirroring and concludes that no attack traffic exists when captures remain empty.

Inspect event pattern and detail, Lambda IAM role, idempotency key, retry/DLQ policy, logged action and configuration outcome. These checks are primarily associated with EventBridge and Lambda network change reaction; they are less discriminating for this case. The relevant checks are: Inspect template parameter values, change sets, route dependencies, stack outputs, drift state and failure/rollback events. Scenario: An operator changes a Transit Gateway route directly in the console and its CloudFormation stack keeps reporting drift from the source template.

Inspect endpoint ENI addresses, service name, endpoint acceptance status, subnet placement, security-group inbound ports and DNS resolution. These checks are primarily associated with Interface VPC endpoints and PrivateLink service acceptance; they are less discriminating for this case. The relevant checks are: Inspect template parameter values, change sets, route dependencies, stack outputs, drift state and failure/rollback events. Scenario: An operator changes a Transit Gateway route directly in the console and its CloudFormation stack keeps reporting drift from the source template.

Compare CDK context values, synthesized resources, environment references, stack dependencies and deployed change sets. These checks are primarily associated with AWS CDK network configuration and environment context; they are less discriminating for this case. The relevant checks are: Inspect template parameter values, change sets, route dependencies, stack outputs, drift state and failure/rollback events. Scenario: An operator changes a Transit Gateway route directly in the console and its CloudFormation stack keeps reporting drift from the source template.

Check mirror sources and filters, target health, capture timeline, packet identifiers, access logging and retention approvals. These checks are primarily associated with Traffic Mirroring forensic capture access governance; they are less discriminating for this case. The relevant checks are: Correlate API eventName/principal/time/resource, Flow Log ENI/action/ports, affected route table and change records. Scenario: An organization sees a sudden security group exposure but reviews only Flow Logs and cannot determine which IAM principal opened the inbound rule.

Review viewer protocol policy, origin protocol policy, CloudFront access logs, certificate associations and origin permission settings. These checks are primarily associated with CloudFront HTTPS policies and origin security; they are less discriminating for this case. The relevant checks are: Correlate API eventName/principal/time/resource, Flow Log ENI/action/ports, affected route table and change records. Scenario: An organization sees a sudden security group exposure but reviews only Flow Logs and cannot determine which IAM principal opened the inbound rule.

Verify record format, start/end aggregation periods, flow direction, tcp-flags, action, log-status and delivery permissions. These checks are primarily associated with Custom VPC Flow Log fields and aggregation limits; they are less discriminating for this case. The relevant checks are: Correlate API eventName/principal/time/resource, Flow Log ENI/action/ports, affected route table and change records. Scenario: An organization sees a sudden security group exposure but reviews only Flow Logs and cannot determine which IAM principal opened the inbound rule.

Check transport attachment, Connect peer GRE outer IPs, inside BGP address allocation, advertised routes and TGW routing tables. These checks are primarily associated with Transit Gateway Connect peer implementation; they are less discriminating for this case. The relevant checks are: Inspect DX gateway associations, attached transit or virtual private gateway, allowed prefixes, VIF type, BGP advertisements and quota constraints. Scenario: A networking engineer changes allowed prefixes at a DX gateway association but does not confirm corresponding advertisements on the external BGP router.

Review DX VIF reachability to VPN endpoint public IPs, IKE proposals, tunnel BGP routes, MTU/MSS and encryption evidence. These checks are primarily associated with VPN over Direct Connect for encrypted hybrid connectivity; they are less discriminating for this case. The relevant checks are: Inspect DX gateway associations, attached transit or virtual private gateway, allowed prefixes, VIF type, BGP advertisements and quota constraints. Scenario: A networking engineer changes allowed prefixes at a DX gateway association but does not confirm corresponding advertisements on the external BGP router.

Inspect outbound endpoint status, corporate DNS targets, rule priority and domain suffix, VPC rule associations, UDP/TCP 53 security groups and query logs. These checks are primarily associated with Resolver outbound rule with conditional corporate forwarding; they are less discriminating for this case. The relevant checks are: Inspect DX gateway associations, attached transit or virtual private gateway, allowed prefixes, VIF type, BGP advertisements and quota constraints. Scenario: A networking engineer changes allowed prefixes at a DX gateway association but does not confirm corresponding advertisements on the external BGP router.