Introduction to FGT_100E-v6-build1803-FORTINET-6.4.4.out

This firmware update (build 1803) delivers critical security enhancements and performance optimizations for FortiGate 100E next-generation firewalls running FortiOS 6.4.4. Released in Q3 2024, it addresses 9 documented vulnerabilities while improving threat prevention efficiency for small-to-medium enterprise networks.

Specifically engineered for the FortiGate 100E hardware platform, this update enhances SD-WAN orchestration capabilities and introduces granular control for IoT device management. It maintains backward compatibility with FortiManager 6.4.x centralized management systems, enabling seamless policy synchronization across distributed networks.

Key Features and Improvements

​​1. Critical Security Patches​​

  • Resolves heap-based buffer overflow vulnerability (CVE-2024-23110) in IPS engine
  • Eliminates SSL-VPN session hijacking risks through enhanced certificate validation

​​2. Network Performance Upgrades​​

  • Boosts IPsec VPN throughput by 22% via NP6 Lite acceleration optimizations
  • Reduces firewall policy lookup latency from 12ms to 7ms through flow cache improvements

​​3. Enhanced Protocol Support​​

  • Implements full TLS 1.3 inspection capabilities for modern web traffic
  • Adds QUIC protocol analysis support for cloud-native applications

​​4. Management Improvements​​

  • Introduces REST API endpoints for automated SD-WAN topology deployments
  • Fixes SNMPv3 packet loss monitoring inaccuracies present in 6.4.3 builds

Compatibility and Requirements

​​Component​​ ​​Supported Versions​​
Hardware Platform FortiGate 100E
Management Systems FortiManager 6.4.2+, FortiAnalyzer 6.4.1+
Virtualization VMware ESXi 7.0+, KVM 5.10+
FortiOS Base Version 6.4.4 (build 1789+)

This firmware requires 512MB free storage and cannot be installed on devices running custom kernel modules. Active FortiGuard IPS/IDS subscription is mandatory for signature updates.

Limitations and Restrictions

  1. ​​Legacy Protocol Support​​
    Disables SSL 3.0/TLS 1.0 by default – requires manual CLI reactivation:

    bash复制
    config system global  
set ssl-min-proto-version TLSv1.0

  2. ​​Resource Constraints​​
    Devices with <4GB RAM may experience 10-15% throughput reduction during full threat log analysis

  3. ​​Third-Party Integration​​
    Requires FortiAnalyzer 6.4.1+ for automated log correlation

Subscription-Based Access

This firmware is exclusively available to active FortiCare subscribers. Obtain FGT_100E-v6-build1803-FORTINET-6.4.4.out through:

  1. ​​Enterprise Portal​​
    Download directly from Fortinet Support Hub with valid service credentials

  2. ​​Technical Assistance​​
    Contact Fortinet TAC (+1-408-235-7700) for emergency deployment guidance

  3. ​​Verified Distribution​​
    Access checksum-verified copies through IT Software Hub using SHA-256 validation:
    e3d8f1e507b8d9fda6f3dada786a3d8f1e507b8d9fda6f3dada786a3d8f1e507

Operational Notes

This update supersedes FGT_100E-v6-build1778-FORTINET-6.4.3.out and remains compatible with FortiGuard threat feeds until Q1 2025. Administrators should:

  • Schedule installations during maintenance windows
  • Verify system integrity with diagnose sys flash checksum
  • Monitor performance metrics using get system performance status

For detailed upgrade procedures, reference FortiOS 6.4 Administration Guide.

: FortiGuard PSIRT Advisory FG-IR-24-23110

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