Spamhaus DROP and SBL are the standard for mail and network DNSBL blocking. isMalicious adds REST enrichment, URL scoring, CVE context, and STIX feeds. Most mature stacks use both at different layers.

Replace long-lived cloud secrets with GitHub Actions OIDC while constraining claims, permissions, environments, reusable workflows, and incident response.

Turn Kubernetes audit logs into detections for privilege abuse, secret access, persistence, risky exec, and control-plane compromise.