Skip links

FortiGate 91G

RM0.00

FortiGate 91G

FortiGate 90G Series

Fortinet FortiGate 91G

Enterprise-Grade Protection for Smaller Networks

The FortiGate 91G delivers 4.5 Gbps IPS, 2.2 Gbps threat protection, 25 Gbps IPsec VPN, 120 GB onboard SSD, and 2x 10GE RJ45/SFP+ WAN ports powered by SP5 ASIC for enterprise branch deployments.
4.5 Gbps
IPS Throughput
2.2 Gbps
Threat Protection
1,500,000
Concurrent Sessions


Overview

Enterprise-Grade Protection for Smaller Networks
The FortiGate 91G delivers a powerful converged next-generation firewall and SD-WAN solution in a compact desktop form factor, engineered for distributed enterprise sites requiring high throughput and advanced security. With 4.5 Gbps IPS throughput, 25 Gbps IPsec VPN, and 10 GE/SFP+ WAN connectivity, the 90G provides a significant performance leap for demanding branch and midsized enterprise deployments.

The 91G series runs on FortiOS, the industry’s first converged networking and security operating system. The SP5 ASIC delivers unprecedented performance acceleration, enabling high-throughput SSL inspection (2.6 Gbps), 41.85 Mpps packet processing, and 300,000 concurrent SSL sessions — all in a compact fanless-capable chassis.

IPSNGFWThreat ProtectionInterfaces
4.5 Gbps2.5 Gbps2.2 Gbps8x GE RJ45 Internal | 2x 10GE RJ45/SFP+ WAN | 1 x 120 GB SSD

Highlights:

  • Gartner Magic Quadrant Leader for both Network Firewalls and SD-WAN.
  • 4.5 Gbps IPS throughput and 2.2 Gbps threat protection powered by Fortinet’s SP5 ASIC.
  • 10 GE/SFP+ dual-media WAN ports for high-speed fibre or copper WAN flexibility.
  • 25 Gbps IPsec VPN throughput for high-performance site-to-site and remote access.
  • 2.6 Gbps SSL inspection throughput — essential for modern encrypted traffic environments.
  • Supports up to 24 FortiSwitches and 96 FortiAPs for comprehensive SD-Branch deployments.

Features

FortiGuard AI-Powered Security Services

FortiGuard AI-Powered Security Services is part of Fortinet’s layered defense and tightly integrated into our FortiGate NGFWs and other products. Infused with the latest threat intelligence from FortiGuard Labs, these services protect organizations against modern attack vectors and threats, including zero-day and sophisticated AI-powered attacks.


Network and file security

Network and file security services protect against network and file-based threats. With over 18,000 signatures, our industry-leading intrusion prevention system (IPS) uses AI/ML models for deep packet/SSL inspection, detecting and blocking malicious content, and applying virtual patches for newly discovered vulnerabilities. Anti-malware protection defends against both known and unknown file-based threats, combining antivirus and sandboxing for multi-layered security. Application control improves security compliance and provides real-time visibility into applications and usage


Web / DNS Security

Web/DNS security services protect against DNS-based attacks, malicious URLs (including those in emails), and botnet communications. DNS filtering blocks the full spectrum of DNSbased attacks while URL filtering uses a database of over 300 million URLs to identify and block malicious links. Meanwhile, IP reputation and anti-botnet services guard against botnet activity and DDoS attacks. FortiGuard Labs blocks over 500 million malicious/phishing/ spam URLs weekly, and blocks 32,000 botnet command-and-control attempts every minute, demonstrating the robust protection offered through Fortinet.


SaaS and Data Security

SaaS and data security services cover key security needs for application use and data protection. This includes data loss prevention to ensure visibility, management, and protection (blocking exfiltration) of data in motion across networks, clouds, and users. Our inline cloud access security broker service protects data in motion, at rest, and in the cloud, enforcing compliance standards and managing account, user, and cloud app usage. Services also assess infrastructure, validate configurations, and highlight risks and vulnerabilities, including IoT device detection and vulnerability correlation.


Zero-Day Threat Prevention

Zero-day threat prevention is achieved through AI-powered inline malware prevention to analyze file content to identify and block unknown malware in real time, delivering sub-second protection across all NGFWs. The service also integrates the MITRE ATT&CK matrix to speed up investigations. Integrated into FortiGate NGFWs, the service provides comprehensive defense by blocking unknown threats, streamlining incident response, and reducing security overhead.


OT Security

With over 1000 virtual patches, 1100+ OT applications, and 3300+ protocol rules, integrated OT security capabilities detect threats targeting OT infrastructure, perform vulnerability correlation, apply virtual patching, and utilize industry-specific protocol decoders for robust defense of OT environments and devices.


FortiOS Everywhere

FortiOS, Fortinet’s Real-Time Network Security Operating System

FortiOS is the operating system that powers Fortinet Security Fabric platform, enabling enforcement of security policies and holistic visibility across the entire attack surface. FortiOS provides a unified framework for managing and securing networks, cloud-based, hybrid, or a convergence of IT, OT, and IoT. FortiOS enables seamless and efficient interoperation across Fortinet products with consistent and consolidated AI-powered protection across today’s hybrid environments.

Unlike traditional point solutions, Fortinet adopts a holistic approach to cybersecurity, aiming to reduce complexities, eliminate security silos, and improve operational efficiencies. By consolidating security functions into a single platform, FortiOS simplifies management, reduces costs, and enhances overall security posture. Together, FortiGate and FortiOS create intelligent, adaptive protection to help organizations reduce complexity, eliminate security silos, and optimize user experience.

By integrating generative AI (GenAI), FortiOS further enhances the ability to analyze network traffic and threat intelligence, detects deviations or anomalies more effectively, and provides more precise remediation recommendations, ensuring minimum performance impact without compromising security.

Available in:

Intuitive easy to use view into the network and endpoint vulnerabilities

Comprehensive view of network performance, security, and system status


Fortinet ASICs: Unrivaled Security, Unprecedented Performance

Powered by the only purpose-built SPU

Traditional firewalls cannot protect against today’s content and connection-based threats because they rely on off-the-shelf general-purpose central processing units (CPUs), leaving a dangerous security gap. Fortinet’s custom SPUs deliver the power you need to radically increase speed, scale, and efficiency while greatly improving user experience and reducing footprint and power requirements. Fortinet’s SPUs deliver up to 520 Gbps of protected throughput to detect emerging threats and block malicious content while ensuring your network security solution does not become a performance bottleneck.

Fortinet ASICs are designed to be energy-efficient, leading to lower power consumption and improved TCO. They deliver industry-leading throughput, handle more traffic and perform security inspections faster, reduce latency for quicker packet processing and minimize network delays.

Fortinet SPUs are designed with integrated security functions like zero trust, SSL, IPS, and VXLAN to name but a few, dramatically improving the performance of these functions that competitors traditionally implement in software.

Secure SD-WAN ASIC SP5

  • Combines a RISC-based CPU with Fortinet’s proprietary SPU content and network processors for unmatched performance
  • Delivers the industry’s fastest application identification and steering for efficient business operations
  • Accelerates IPsec VPN performance for the best user experience on direct internet access
  • Enables best-of-breed NGFW security and deep SSL inspection with high performance
  • Extends security to the access layer to enable SD-Branch transformation with accelerated

Use Cases

Perimeter Protection
  • Protect networks from malicious traffic, guard against file-based threats, block web-based attacks, and secure applications and data with natively integrated FortiGuard AI-Powered Security Services
  • Inspect and control incoming and outgoing traffic based on defined security policies
  • Perform real-time SSL inspection (including TLS 1.3) with full visibility into users, devices, and applications across the attack surface
  • Accelerate performance, protection, and energy efficiency with Fortinet’s patented SPU with converged security and networking technologies

Secure SD-WAN
  • FortiGate enables best-of-breed WAN edge with integrated SD-WAN, WAN optimization, security, and unified management from a single FortiOS operating system
  • FortiGate, built on a patented SD-WAN-based ASIC, delivers faster application identification to avoid delays in accessing applications and accelerates overlay performance regardless of location
  • Enhances hybrid working with a comprehensive SASE solution by integrating cloud-delivered SD-WAN with security service edge (SSE)
  • Achieves operational efficiencies at any scale through automation, deep analytics, and selfhealing

Secure Branch
  • The Fortinet Security Fabric platform enables FortiGate NGFWs to automatically discover and secure IoT devices for faster branch onboarding
  • Fully integrated with FortiSwitch secure Ethernet switches and FortiAP access points, FortiGate easily extends security to WAN, LAN, and WLAN at branch offices for unified protection and reliable connectivity
  • FortiGate and Fortinet products work seamlessly with FortiManager to centralize visibility and simplify management across locations for IT teams
  • FortiGate HA support ensures continuous network protection and minimizes downtime in the event of hardware failures or network disruptions

Hardware

FortiGate 91G hardware

Interfaces

  1. 1x Console Port (RJ45)
  2. 2x 10GE RJ45/SFP+ Shared Media WAN Ports
  3. 8x GE RJ45 Internal Ports
  4. 1x USB Port
  5. 1x 120 GB SSD (Internal Storage)
Trusted Platform Module (TPM)

The FortiGate 91G features a dedicated TPM module that hardens the appliance by generating, storing, and authenticating cryptographic keys against malicious software and phishing attacks.

10 GE/SFP+ Dual-Media WAN

The 2x 10GE RJ45/SFP+ shared media WAN ports support both copper and fibre 10 Gigabit WAN connectivity, providing high-speed WAN flexibility without additional modules.

Access Layer Security

FortiLink protocol enables convergence of security and network access by integrating FortiSwitch as a logical NGFW extension, supporting up to 24 FortiSwitches for complete SD-Branch deployments.

High-Performance SSL Inspection

Achieves 2.6 Gbps SSL inspection throughput with 300,000 concurrent SSL sessions — enabling full visibility into encrypted traffic without compromising performance.

Specifications

Technical Specifications

Hardware Specifications 7
FortiGate 90G FortiGate 91G
10/5/2.5GE RJ45 or 10GE SFP+ Shared Media Pairs 2 2
GE RJ45 Internal Ports 8 8
USB Ports 1 1
Console Port (RJ45) 1 1
Internal Storage u2013 1 x 120 GB SSD
Trusted Platform Module (TPM) u2713 u2713
Bluetooth Low Energy (BLE) u2713 u2713
System Performance u2014 Enterprise Traffic Mix 3
FortiGate 90G FortiGate 91G
IPS Throughput 4.5 Gbps
NGFW Throughput 2.5 Gbps
Threat Protection Throughput 2.2 Gbps
System Performance 21
FortiGate 90G FortiGate 91G
Firewall Throughput (1518 / 512 / 64 byte UDP packets) 28/28/27.9 Gbps
Firewall Latency (64 byte UDP packets) 3.23 u03bcs
Firewall Throughput (Packets Per Second) 41.85 Mpps
Concurrent Sessions (TCP) 1,500,000
New Sessions/Second (TCP) 124,000
Firewall Policies 5,000
IPsec VPN Throughput (512 byte) 25 Gbps
Gateway-to-Gateway IPsec VPN Tunnels 200
Client-to-Gateway IPsec VPN Tunnels 2,500
SSL-VPN Throughput 1.4 Gbps
Concurrent SSL-VPN Users (Recommended Maximum, Tunnel Mode) 200
SSL Inspection Throughput (IPS, avg. HTTPS) 2.6 Gbps
SSL Inspection CPS (IPS, avg. HTTPS) 300,000
SSL Inspection Concurrent Session (IPS, avg. HTTPS) 390,000
Application Control Throughput (HTTP 64K) 6.7 Gbps
CAPWAP Throughput (HTTP 64K) 23.6 Gbps
Virtual Domains (Default / Maximum) 10 / 10
Maximum Number of FortiSwitches Supported 24
Maximum Number of FortiAPs (Total / Tunnel Mode) 96 / 48
Maximum Number of FortiTokens 500
High Availability Configurations Active-Active, Active-Passive, Clustering
Dimensions 4
FortiGate 90G FortiGate 91G
Height x Width x Length (inches) 1.65 x 8.5 x 7.0
Height x Width x Length (mm) 42 x 216 x 178
Weight 2.47 lbs (1.12 kg)
Form Factor Desktop
Operating Environment and Certifications 10
FortiGate 90G FortiGate 91G
Power Rating 12V DC, 5A (dual redundancy optional)
Power Consumption (Average / Maximum) 19.9 W / 20.53 W 22.4 W / 23.5 W
Heat Dissipation 70.01 BTU/hr 80.14 BTU/hr
Operating Temperature 32u00b0 to 104u00b0F (0u00b0 to 40u00b0C)
Storage Temperature -31u00b0 to 158u00b0F (-35u00b0 to 70u00b0C)
Humidity 10% to 90% non-condensing
Noise Level 21.73 dBA
Operating Altitude Up to 10,000 ft (3,048 m)
Compliance FCC, ICES, CE, RCM, VCCI, BSMI, UL/cUL, CB
Certifications USGv6/IPv6

Products

Fortinet Products

FortiGate 91G Base Appliance
FortiGate-91G 8 x GE RJ45 Internal Ports, 2 x 10GE RJ45/SFP+ Shared Media WAN Ports, 120 GB SSD onboard storage #FG-91G
FortiGate-91G Hardware plus FortiCare Premium and FortiGuard Enterprise Protection
Includes: Hardware Unit, FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, Enterprise Services Bundle plus term of contract
FortiGate-91G Hardware plus 1 Year FortiCare Premium and FortiGuard Enterprise Protection #FG-91G-BDL-809-12
FortiGate-91G Hardware plus 3 Year FortiCare Premium and FortiGuard Enterprise Protection #FG-91G-BDL-809-36
FortiGate-91G Hardware plus 5 Year FortiCare Premium and FortiGuard Enterprise Protection #FG-91G-BDL-809-60
FortiGate-91G Hardware plus FortiCare Premium and FortiGuard Unified Threat Protection (UTP)
Includes: Hardware Unit, FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, UTP Services Bundle plus term of contract
FortiGate-91G Hardware plus 1 Year FortiCare Premium and FortiGuard Unified Threat Protection (UTP) #FG-91G-BDL-950-12
FortiGate-91G Hardware plus 3 Year FortiCare Premium and FortiGuard Unified Threat Protection (UTP) #FG-91G-BDL-950-36
FortiGate-91G Hardware plus 5 Year FortiCare Premium and FortiGuard Unified Threat Protection (UTP) #FG-91G-BDL-950-60
FortiGate-91G Advanced Threat Protection
FortiGate-91G 1 Year Advanced Threat Protection (IPS, Advanced Malware Protection Service, Application Control, and FortiCare Premium) #FC-10-0091G-928-02-12
FortiGate-91G 3 Year Advanced Threat Protection #FC-10-0091G-928-02-36
FortiGate-91G 5 Year Advanced Threat Protection #FC-10-0091G-928-02-60
FortiGate-91G Unified Threat Protection (UTP)
FortiGate-91G 1 Year Unified Threat Protection (UTP) #FC-10-0091G-950-02-12
FortiGate-91G 3 Year Unified Threat Protection (UTP) #FC-10-0091G-950-02-36
FortiGate-91G 5 Year Unified Threat Protection (UTP) #FC-10-0091G-950-02-60

Pricing Notes:

  • Hardware plus FortiCare Premium and FortiGuard Enterprise Protection Hardware Unit, FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, Enterprise Services Bundle (IPS, AI-based Inline Malware Prevention, Advanced Malware Protection, Inline CASB Database, Data Loss Prevention, Application Control, URL, DNS & Video Filtering, Antispam, Attack Surface Security, and FortiConverter Service) plus term of contract
  • Hardware plus FortiCare Premium and FortiGuard Unified Threat Protection (UTP) Hardware Unit, FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, UTP Services Bundle (IPS, AV, Botnet IP/Domain, Mobile Malware, FortiGate Cloud Sandbox including Virus Outbreak and Content Disarm & Reconstruct, Application Control, URL, DNS & Video Filtering and Antispam Service) plus term of contract
  • Enterprise Protection (IPS, AI-based Inline Malware Prevention, Inline CASB Database, DLP, App Control, Adv Malware Protection, URL/DNS/Video Filtering, Anti-spam, Attack Surface Security, Converter Svc, FortiCare Premium) FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, Enterprise Services Bundle
  • Unified Threat Protection (UTP) (IPS, Advanced Malware Protection, Application Control, URL, DNS & Video Filtering, Antispam Service, and FortiCare Premium) FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, UTP Services Bundle
  • Advanced Threat Protection (IPS, Advanced Malware Protection Service, Application Control, and FortiCare Premium) FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, Advanced Threat Protection Bundle
  • FortiCare Essential Support FortiCare Essential Ticket Handling, Hardware Replacement, Firmware and General Upgrades, Application Control
  • FortiCare Premium Support FortiCare Premium Ticket Handling, Advanced Hardware Replacement (NBD), Firmware and General Upgrades, Application Control
  • FortiCare Elite Support FortiCare Premium Support with FortiCare Elite Ticket Handling.
  • Prices are for one year of Premium RMA support. Usual discounts can be applied.
  • Annual contracts only. No multi-year SKUs are available for these services.
  • Contact Fortinet Renewals team for upgrade quotations for existing FortiCare contracts.
  • Pricing and product availability subject to change without notice.

FAQ

Common Questions

Can't find what you're looking for? Reach out and our team will be happy to help.

The FortiGate 91G adds 1 x 120 GB onboard SSD storage to the 90G for extended local logging, event retention, and compliance reporting. All performance specifications are identical between the two models.

The FortiGate 91G features 2x 10GE RJ45/SFP+ Shared Media WAN ports, supporting both copper 10 GE RJ45 and fibre 10 GE SFP+ connections for high-speed WAN connectivity without additional modules.

The FortiGate 91G is powered by Fortinet's SP5 SD-WAN ASIC, which combines a RISC-based CPU with Security Processing Unit (SPU) content and network processors. This delivers hardware-accelerated IPsec VPN (25 Gbps), SSL inspection (2.6 Gbps), and application identification at line rate.

For high-security enterprise branch deployments, the Enterprise Protection bundle is recommended u00e2u20acu201d it includes IPS, AI-based malware prevention, DLP, CASB, application control, URL/DNS filtering, antispam, attack surface security, and FortiCare Premium support.

Description

The FortiGate 91G extends the 90G with 120 GB onboard SSD storage for local logging and event retention, delivering 4.5 Gbps IPS throughput, 25 Gbps IPsec VPN, 2.6 Gbps SSL inspection, and 2x 10GE WAN ports for enterprise branch deployments.

This website uses cookies to improve your web experience.