About This Architecture

Secure multi-tier fintech network with layered firewalls, load balancers, and segregated VLANs protecting web, app, and database tiers. Traffic flows from Internet through Core Router (BGP), External Firewall, WAF, and Web Load Balancer before reaching nginx web servers in VLAN 10. Application tier in VLAN 20 runs Java servers behind Load Balancer-App, while PostgreSQL primary and replicas in VLAN 30 are protected by Firewall-DB with replication across nodes. Management Zone (10.0.99.0/24) provides centralized Prometheus monitoring and ELK Stack logging, with VPN Gateway enabling secure remote access. This architecture demonstrates defense-in-depth principles critical for fintech compliance, reducing blast radius and enforcing least-privilege access across all network segments. Fork and customize this diagram on Diagrams.so to match your organization's IP ranges, add additional security controls, or integrate with your specific monitoring tools. The three-layer firewall strategy (external, internal, database) combined with VLAN isolation exemplifies zero-trust network design for regulated financial services.

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How should I design a secure multi-tier network architecture for a fintech application with defense-in-depth firewalls and VLAN segmentation?

This diagram shows a fintech-grade network with three firewall layers (external, internal, database), WAF protection, and VLAN-segregated tiers: VLAN 10 for nginx web servers, VLAN 20 for Java app servers, and VLAN 30 for PostgreSQL primary/replicas. Load balancers distribute traffic, while Prometheus and ELK Stack provide centralized monitoring and logging across all segments.