Description
Fortinet FG-120G – FortiGate Next-Generation Firewall
Product Overview
The Fortinet FG-120G is a high-performance next-generation firewall (NGFW) designed to protect enterprise networks, medium-sized businesses, branch offices, and distributed IT environments. Part of the FortiGate 120G Series, this security appliance combines firewalling, intrusion prevention, application control, VPN connectivity, and advanced threat protection in a single integrated platform.
Powered by Fortinet’s FortiSP5 security processing technology, the FG-120G accelerates network security operations to help organizations maintain strong protection while minimizing performance overhead. It supports high-throughput network traffic inspection, secure connectivity between sites, and centralized network security management.
With 39 Gbps firewall throughput, 5.3 Gbps IPS throughput, and 2.8 Gbps threat protection throughput, the FortiGate FG-120G is designed for environments that require comprehensive security, high-speed connectivity, and reliable network performance.
Key Features
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Manufacturer: Fortinet
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Product Family: FortiGate 120G Series
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Model: FG-120G
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Product Type: Next-Generation Firewall (NGFW)
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Security Processor: FortiSP5
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Firewall Throughput: Up to 39 Gbps
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IPS Throughput: Up to 5.3 Gbps
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NGFW Throughput: Up to 3.1 Gbps
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Threat Protection Throughput: Up to 2.8 Gbps
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IPsec VPN Throughput: Up to 35 Gbps
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Concurrent Sessions: 3 million
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New Sessions per Second: 140,000
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Network Interfaces: 18 × GE RJ45, 8 × GE SFP, 4 × 10GE SFP+
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Power Supply: Dual AC power supplies
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Form Factor: 1U rack-mount appliance
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Operating System: FortiOS
Advanced Network Security
The FortiGate FG-120G integrates multiple network security functions into a single appliance, helping organizations protect their networks against unauthorized access, malicious traffic, and other cybersecurity threats.
Its security capabilities include:
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Stateful firewall inspection
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Intrusion Prevention System (IPS)
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Application control
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Antivirus and malware protection
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Web filtering and content security
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IPsec VPN connectivity
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Network access control and segmentation
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Security policy enforcement
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Threat detection and mitigation
These capabilities help IT teams apply consistent security policies across corporate networks, branch offices, data centers, and remote connections. Availability of specific security services and advanced inspection features depends on the FortiOS version, configuration, and applicable FortiGuard subscriptions.
High-Performance Firewall Throughput
The FG-120G is designed to provide high-speed network traffic processing while enforcing firewall policies and controlling network access.
With firewall throughput of up to 39 Gbps, it can support demanding enterprise network environments where large volumes of traffic must be processed efficiently. This capacity makes the appliance suitable for network gateways, business-critical infrastructure, and security deployments requiring high throughput.
Intrusion Prevention System (IPS)
The integrated Intrusion Prevention System inspects network traffic for suspicious activity and potential exploits.
With IPS throughput of up to 5.3 Gbps, the FG-120G provides protection against network-based threats while helping maintain performance in environments with substantial traffic volumes. IPS functionality can be used to identify and block malicious traffic according to configured security policies.
Next-Generation Firewall Capabilities
The FG-120G provides up to 3.1 Gbps of NGFW throughput. This performance figure represents traffic processing with firewall, intrusion prevention, and application control enabled under Fortinet’s specified test conditions.
These capabilities allow administrators to enforce policies based on network traffic and application behavior, helping improve visibility and control across enterprise networks.
Integrated Threat Protection
The appliance delivers threat protection throughput of up to 2.8 Gbps, according to the FortiGate 120G Series datasheet.
Threat protection combines multiple inspection technologies to help identify and block malicious traffic, including threats addressed by intrusion prevention, application control, and malware protection. This integrated approach helps reduce the need to deploy separate appliances for individual security functions. Actual throughput depends on the enabled security features and traffic conditions.
FortiSP5 Security Processing Technology
The FG-120G uses Fortinet’s FortiSP5 security processing unit, designed to accelerate security and networking workloads.
Hardware acceleration helps improve the efficiency of traffic processing, security inspection, and network connectivity. This architecture is intended to deliver high performance while supporting the combined security requirements of modern enterprise networks.
High-Speed VPN Connectivity
The FortiGate FG-120G supports IPsec VPN connectivity for secure communication between geographically distributed offices, corporate headquarters, data centers, and remote network environments.
With IPsec VPN throughput of up to 35 Gbps, it can support high-bandwidth encrypted connections for business applications and site-to-site communication. VPN performance varies with encryption algorithms, packet sizes, tunnel configuration, and other operating conditions.
Comprehensive Network Connectivity
The FG-120G offers a broad selection of copper and fiber interfaces for flexible deployment in enterprise network architectures.
Its interface configuration includes:
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16 × Gigabit Ethernet RJ45 switch ports
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1 × Gigabit Ethernet RJ45 management port
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1 × Gigabit Ethernet RJ45 HA port
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8 × Gigabit Ethernet SFP slots
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4 × 10 Gigabit Ethernet SFP+ slots
This combination supports copper-based network connections, fiber uplinks, high-speed network aggregation, and dedicated management and high-availability connections. The 10GE SFP+ slots can also support FortiLink connectivity for compatible FortiSwitch deployments.
High Availability and Redundant Power
The FG-120G includes dual AC power supplies configured for 1+1 redundancy. This design helps maintain power availability if one power supply fails, provided the appliance is connected to an appropriate redundant power arrangement.
The dedicated HA interface also supports high-availability network designs, allowing compatible FortiGate appliances to be configured for redundancy and continuity. The exact behavior depends on the deployment architecture and configuration.
Enterprise Network Management
The appliance runs FortiOS, Fortinet’s network security operating system. FortiOS provides the configuration and management framework for firewall policies, network interfaces, routing, VPNs, and security functions.
Depending on the deployment and licensing, organizations can integrate the FG-120G with Fortinet’s security management and analytics products to support centralized administration, policy consistency, and security event visibility.
