FortiGate 51G Firewall

FortiGate 51G is a next-generation firewall (NGFW) and Secure SD-WAN appliance designed for small to mid-sized businesses and branch offices that require advanced threat protection, high encrypted traffic performance, and flexible WAN connectivity in a compact, fanless desktop form factor.

FortiGate 51G

Why Choose FortiGate 51G?

Advanced Threat Protection

AI-powered Intrusion Prevention System (IPS)
Antivirus and malware protection
Web filtering and DNS security

Secure SD-WAN Built-In

Application-aware traffic steering
SLA-based WAN path selection
Optimised cloud and SaaS access

Operations & Manageability

Fanless, silent desktop design
High VPN and SSL inspection throughput
Scales for growing branch networks

Common Use Cases

Branch Office Security

Centralised security enforcement for distributed branch locations.

SMB Network Security

Enterprise-grade firewall protection for small and mid-sized businesses

Secure SD-WAN Edge

Improved application performance across multiple WAN connections.

VPN Connectivity

High-performance IPsec VPN for site-to-site and remote access use.

Cloud & SaaS Access

High-performance IPsec VPN for site-to-siteOptimised and secure access to Microsoft 365 and cloud platforms. and remote access use.

Technical Specifications – FortiGate 51G

Performance

Firewall Throughput5 Gbps
IPS Throughput2.25 Gbps
NGFW Throughput1.25 Gbps
Threat Protection1.1 Gbps
SSL Inspection1.3 Gbps

VPN Capacity

IPsec VPN Throughput4.5 Gbps
Gateway-to-Gateway Tunnels200
Client-to-Gateway Tunnels250
Concurrent Sessions720,000

Interfaces & Ports

GE RJ45 WAN Ports1
GE RJ45 Internal Ports4
USB Port1
Console (RJ45)1

Hardware & Capacity

Form FactorDesktop, fanless
Onboard Storage64 GB SSD
ProcessorFortiASIC SP5
New Sessions / sec85,000

System Limits

Virtual Domains (VDOMs) 5 (Default/Max)
Firewall Policies2,000
Max FortiSwitches8
Max FortiAPs (Total / Tunnel) 16 / 8

Management & Services

Secure SD-WANYes
Centralized Management FortiManager
Logging & Analytics FortiAnalyzer
Security Services FortiGuard AI

Available Variants

FortiGate 51F

Standard NGFW and Secure SD-WAN appliance with onboard storage.

Bundled & Cloud Options

Available with FortiGuard security bundles, FortiCare support, and FortiGate Cloud subscriptions for centralised management and analytics.

Subscription & Licensing

FortiGate 50G uses a subscription-based licensing model. The hardware can operate as a basic firewall without a license; however, advanced security services require an active FortiGuard subscription.

  • UTP – Unified Threat Protection (most common)
  • ATP – Advanced Threat Protection
  • Enterprise Protection – Compliance-focused security
  • Subscriptions available for 1, 3, or 5 years
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