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Business Systems House 2026

Network Address Translation (NAT) & Port Forwarding Architecture

Network Address Translation (NAT) & Port Forwarding Architecture
FortiGate Central NAT VIPs Destination NAT (DNAT) Source NAT (SNAT) IP Pools

Network Address Translation (NAT) & Port Forwarding Architecture

Architected clean perimeter NAT policies mapping public IP addresses to isolated internal DMZ server endpoints with explicit port restriction.

Key Features & Implementation

  • Virtual IP (VIP) Mapping: Mapped static external public IP addresses to internal DMZ server IPs restricted strictly to required listening ports (e.g., 443, 22).
  • Source NAT (SNAT) IP Pools: Configured outbound overload NAT IP pools to prevent perimeter gateway IP port exhaustion during peak user hours.
  • Hairpin NAT Routing: Configured loopback NAT rules allowing internal office users to resolve public FQDNs to local servers seamlessly.
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