Network Security & Access Control Architecture
Scope: Extended ACLs, IPSec Site-to-Site VPN, Stateful Firewalls, & Zero-Trust Access Rules
Architecture Overview
Architected an enterprise perimeter defense system focusing on strict access control enforcement, encrypted inter-site transit, and stateful traffic filtering. By combining granular Extended Access Control Lists (ACLs) with hardware-accelerated IPSec VPN tunnels and stateful firewall inspection, the deployment eliminates unauthorized lateral movement while securing sensitive data in transit between remote branch offices and core data centers.
Perimeter Security & VPN Topology
Site-to-Site & Remote Access Secure Tunneling
Key Security Capabilities & Control Mechanisms
Granular Extended ACL Filtering
Designed layer-3 and layer-4 Extended Access Control Lists to enforce strict protocol, port, and IP filtering rules. Restricted inter-VLAN routing paths between production servers, guest zones, and administrative management interfaces.
IPSec Site-to-Site VPN Tunnels
Configured secure IPSec tunnels using IKEv2 proposal parameters, AES-256 encryption, and SHA-512 integrity verification. Established persistent site-to-site connectivity for safe cross-office database synchronization.
Stateful Inspection & NAT/PAT
Deployed stateful packet inspection rules to track active connection states across perimeter gateways. Configured Dynamic NAT with overload (PAT) to obscure internal subnet topologies from external internet probes.
Zero-Trust Ingress Controls
Enforced least-privilege access rules across administrative consoles. Implemented port security MAC-address locking and anti-spoofing unicast reverse path forwarding (uRPF) to safeguard network entry points.