AWS Network Firewall Adds Rule Hit Counts to Eliminate Stale Policies and Validate Compliance

AWS has added native rule hit count tracking to AWS Network Firewall for stateful inspection rules across custom and partner-managed rule groups. Enabled by default across most commercial AWS regions at no additional service cost, the feature measures how frequently specific Suricata-compatible rules match live network traffic. Hit metrics are derived when a rule generates an alert log—covering alert, drop, and reject actions automatically, as well as pass actions explicitly tagged with the alert keyword. The resulting telemetry surfaces in a centralized Top Rule Hits dashboard and embeds Suricata signature IDs (SIDs) alongside AWS resource ARNs in alert logs for downstream analytics. As enterprise virtual private cloud (VPC) deployments scale, firewall rulesets inevitably accumulate technical debt. Security administrators hesitate to delete older rules because determining whether an allow or drop statement is genuinely inactive traditionally required expensive, asynchronous log ingestion and manual Athena or CloudWatch queries. This lack of rule-level visibility introduces performance drag, exhausts firewall capacity limits, and complicates regulatory audits under frameworks like PCI DSS 4.0 and the Digital Operational Resilience Act (DORA), both of which mandate demonstrable proof that network controls are actively operating. This enhancement aligns with a broader shift in cloud infrastructure toward observable, data-driven security policy lifecycle management. As multi-account topologies and transit VPC inspection architectures become default enterprise blueprints, network boundaries can no longer be treated as static configurations. Surfacing match metrics directly within the infrastructure plane reflects how modern platforms are turning passive inspection filters into continuous observability pipelines, closing the gap between intent and runtime behavior across distributed cloud perimeters. In practice, platform and security engineering teams can now establish systematic cleanup routines to identify and safely decommission dormant policies. However, engineers must note two crucial operational caveats: stateless rules remain outside the scope of hit count tracking, and standard pass rules do not record hits unless modified to include the alert keyword. While enabling alerts on high-volume allow rules makes them visible in telemetry, it also increases CloudWatch Logs and S3 ingestion expenses. Teams should selectively apply pass-alerting during auditing windows rather than as a permanent global default to balance visibility against log storage costs.