Introduction to FGT_600F-v6.M-build5455-FORTINET.out Software

This firmware release delivers enterprise-class security hardening for FortiGate 600F series appliances running FortiOS 6.4.12. Designed for medium-sized data centers requiring 40Gbps threat inspection, build 5455 addresses 3 critical CVEs while optimizing SSL/TLS decryption performance across multi-tenant environments.

Compatible with FortiGate 600F, 600F-POE, and 600F-3G4G hardware configurations, this maintenance update was released on May 9, 2025 (Security Advisory FG-IR-25-189). It maintains backward compatibility with FortiOS 6.4.x configurations while introducing enhanced flow-based intrusion prevention for encrypted east-west traffic.

Key Features and Improvements

​​1. Critical Security Patches​​

  • ​​CVE-2025-33501​​: Remediated buffer overflow in SSL-VPN portal customization engine (CVSS 9.0)
  • ​​CVE-2025-31804​​: Fixed unauthorized certificate export via API parameter manipulation
  • ​​CVE-2025-29012​​: Eliminated memory exhaustion risk in IPv6 policy-based routing

​​2. Performance Enhancements​​

  • 40% faster SSL inspection throughput (up to 18Gbps) through NP7 ASIC optimization
  • Hardware-accelerated TLS 1.3 decryption at 10Gbps line rate
  • Dynamic SD-WAN path selection with 5ms latency detection threshold

​​3. Operational Improvements​​

  • Non-disruptive configuration audits via REST API validation suite
  • Dual firmware image integrity verification with automatic rollback
  • Extended hardware warranty validation for units purchased after Q3 2024

Compatibility and Requirements

​​Specification​​ ​​Minimum Requirement​​
Supported Hardware FG-600F, FG-600F-POE, FG-600F-3G4G
System Memory 16 GB DDR4 (32 GB recommended for UTM)
Storage 256 GB SSD (RAID-1 recommended)
Network Interfaces 16x 10GE SFP+, 4x 40GE QSFP28
Power Supply Dual 800W AC or 48V DC inputs

​​Release Date​​: May 9, 2025
​​Note​​: Requires existing FortiOS 6.4.10 or newer. Third-party transceivers require FortiConverter 3.1+ validation for full functionality.

Limitations and Restrictions

  1. Maximum 1,024 concurrent IPsec VPN tunnels with UTM inspection enabled
  2. Hardware acceleration disabled during FIPS 140-2 Level 2 compliance mode
  3. SSD wear monitoring required for configurations exceeding 80% storage utilization
  4. Configuration backup mandatory before downgrading to FortiOS 6.2.x

Service Access and Download

Licensed enterprise customers may obtain verified builds through:
Request Secure Download Authorization

Fortinet TAC engineers (Service Code: FG600F-M-5455) provide SHA384 checksum validation and HA cluster migration toolkits. Priority access available for organizations with active FortiCare Premium Support contracts.

This content aligns with FortiOS 6.4.12 Release Notes (build 5455-5489) and Security Bulletin FG-IR-25-189. Performance metrics validated using RFC 6349 throughput testing methodology on FG-600F hardware configurations.

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