Multi-flow ingress architecture mapping Ansible automation, Nessus vulnerability scanning, Zabbix monitoring, PAM privileged access, and SAP public exposure across seven GCP projects with firewall rules and VLAN boundaries. Data flows from four management servers (Ansible 10.121.0.24, Nessus 10.111.0.63, Zabbix 10.188.0.4/5, PAM 10.100.1.100/2.100) into target projects including malwee-sap, malwee-backup-dr, malwee-prd-motor-de-regras, and gcp-malwee-monitor via GCP firewall policies with protocol-specific ingress rules. The architecture demonstrates least-privilege access patterns for infrastructure automation, security scanning, and monitoring while flagging configuration risks including unconfirmed project access, overly broad Nessus scanning scope, and redundant SAP public exposure rules. Security teams can fork this diagram to audit their own multi-project firewall policies, document access boundaries, and remediate identified gaps in rule specificity and project tagging. This reference architecture is particularly valuable for organizations migrating legacy on-premises access controls to GCP's VPC firewall model.