For IT managers responsible for network security, one of the most critical pieces of information is the End of Support (EOS) and End of Life (EOL) schedule for their deployed equipment. Fortinet’s FortiGate firewalls are among the most widely deployed next-generation firewalls (NGFW) globally, making it essential to understand the lifecycle of both hardware models and FortiOS software.

2025 is particularly significant, as many FortiGate models and FortiOS versions are reaching important transition points. This guide provides systematic, actionable EOS/EOL information based on the latest data for immediate practical use.

1. Understanding Fortinet Product Lifecycle

1-1. Key Terminology

To properly understand Fortinet’s product lifecycle, you need to be familiar with these essential terms:

EOO (End of Order)

• Last date a product can be ordered
• No new purchases available after this date (existing inventory only)

LSED (Last Service Extension Date)

• Final date existing support contracts can be extended
• Typically 12 months before EOS date

EOES (End of Engineering Support)

• Date when software engineering support ends
• Only critical security vulnerabilities receive patches after this point

EOS (End of Support)

• Complete support termination date
• Hardware: 60 months (5 years) after EOO
• Software: 54 months (4.5 years) after GA release

1-2. Hardware vs Software Lifecycle Independence

A unique aspect of Fortinet’s approach is that hardware and software lifecycles operate independently.

Lifecycles

2. FortiOS Software EOS/EOL Status

2-1. FortiOS Version Support Schedule

Current FortiOS version support timelines:

2-2. Critical 2025 Dates

Immediate Action Required:

• FortiOS 6.4: Already EOS complete – security patches discontinued

First Half 2025 Alert:

• FortiOS 7.2: Engineering support ends March 31, 2025

Second Half 2025 Alert:

• FortiOS 7.0: Complete support ends September 30, 2025

3. FortiGate Hardware Model EOS Status

3-1. Current Generation Classification

G Series (2024-Present, Latest Generation) – Status: Currently Sold, EOS Not Announced

Key Features:

• Fortinet’s latest generation model
• Enhanced AI/ML threat detection
• Released 2024, supports FortiOS 7.2+

F Series (2020-Present, Current Mainstream) – Status: Currently Sold, EOS Not Announced

Key Features:

• Fortinet’s current mainstream models
• Built-in SD-WAN and SASE capabilities
• Supports FortiOS 7.0+

3-2. End-of-Life Scheduled Generations

E Series (2015-2021 Generation) – Status: Discontinued, 2025-2026 EOS Scheduled

D Series (2012-2020 Generation) – Status: Mostly EOS Complete

3-3. Enterprise and Data Center Models

High-Performance F Series (Currently Sold) – Status: Current Mainstream Models, EOS Not Announced

Enterprise D Series (EOS Complete or Approaching)

3-4. Special Purpose Models

FortiWiFi Series : WiFi-Enabled Models

FortiGate VM Series – Virtualization Platform Models

Key Features:

• Same FortiOS as physical appliances
• Hypervisor-specific support schedules
• Cloud-optimized deployment

4. 2025 Priority-Based Response Strategy

4-1. Immediate Action Required

🚨 Level 1: Replace Immediately

• FortiOS 6.4 environments: Security patches discontinued
• FortiGate 140E, 91E: Hardware support ended
• Most D Series: Technical support discontinued

Recommended Actions:

1. Conduct security risk assessment
2. Develop emergency replacement plan
3. Implement temporary security hardening measures

4-2. First Half 2025 Planning (January-June)

🔶 Level 2: Planning Required

• FortiOS 7.2: Engineering support ends March
• FortiOS 7.0: Complete support ends September
• FortiGate 90E: April EOS scheduled
• FortiGate 240D, 1500D: 2025 EOS scheduled

Recommended Actions:

1. Establish upgrade timeline
2. Secure budget and approvals
3. Build test environment

4-3. Second Half 2025 Planning (July-December)

⚠️ Level 3: Preparation Complete

• E Series LSED: Contract extension deadline July-November
• FortiGate 240D: July EOS scheduled

Recommended Actions:

1. Decide contract extension or replacement
2. Deploy new equipment and migrate
3. Conduct operations team training

Managing FortiGate and FortiOS EOS/EOL schedules goes beyond technical issues—it’s directly connected to organizational security strategy. 2025 is particularly significant with many expected changes, making systematic planning and phased execution the keys to success.

Immediate Action Required

• FortiOS 6.4, FortiGate 140E, D Series: Emergency replacement
• Implement temporary measures to minimize security risks

2025 Planning Requirements

• E Series: Decision required before second-half contract extension deadline
• FortiOS 7.0/7.2: Prepare for upgrade or replacement

Long-Term Strategy

• Systematic transition to F/G Series
• Establish SASE and cloud security roadmap

Additional Information and Support

• Fortinet Official Support Portal
• FortiOS Upgrade Guide
• FortiGate Migration Tools