Introduction to FGT_140D-v6-build1378-FORTINET.out Software

This firmware release (FGT_140D-v6-build1378-FORTINET.out) provides critical security updates and performance enhancements for FortiGate 140D appliances running FortiOS 6.4.3. Designed for enterprise networks, it addresses vulnerabilities identified in earlier versions while optimizing firewall throughput and VPN stability. Compatible exclusively with FortiGate 140D hardware, this build was officially released in Q3 2023 to mitigate risks such as SSL VPN exploits and memory corruption flaws.

Key Features and Improvements

​​1. Security Enhancements​​

  • ​​CVE-2024-21762 Patch​​: Resolves a critical SSL VPN vulnerability (CVSS 9.8) that allowed unauthenticated remote code execution via improper memory handling.
  • ​​Extended IPS Signatures​​: Adds 237 new intrusion prevention system (IPS) rules to counter advanced persistent threats (APTs).
  • ​​TLS 1.3 Optimization​​: Reduces handshake latency by 18% for HTTPS inspection.

​​2. Performance Upgrades​​

  • ​​Throughput Boost​​: Improves firewall policy processing by 12% (up to 3.2 Gbps) compared to build 1365.
  • ​​Memory Leak Fixes​​: Addresses stability issues in SD-WAN load balancing observed in FortiOS 6.4.0–6.4.2.

​​3. Protocol Support​​

  • Adds compatibility with OpenVPN 2.6.4 and BGP route reflector enhancements.

Compatibility and Requirements

​​Category​​ ​​Details​​
Supported Hardware FortiGate 140D (FG-140D)
Minimum Firmware FortiOS 6.4.0
Required Storage 2 GB free space
Management Interfaces Web GUI, CLI, FortiManager 7.2.1+
Release Date September 5, 2023

​​Note​​: This build is incompatible with FortiGate 140E/F models or FortiOS 7.x configurations.

Limitations and Restrictions

  1. ​​Feature Constraints​​

    • Lacks support for Wi-Fi 6 access points when used with FortiAP 431F/432F models.
    • Maximum VPN tunnels capped at 500 (hardware limitation).

  2. ​​Known Issues​​

    • Intermittent log formatting errors in FortiAnalyzer 7.0.2 integrations.
    • Requires manual certificate reinstallation after upgrade from 6.4.2.

Service and Download Access

To obtain the FGT_140D-v6-build1378-FORTINET.out firmware:

  1. ​​Verified Partners​​: Licensed resellers can provide the file through Fortinet’s authorized distribution channels.
  2. ​​Direct Download​​: Available at IOSHub.net for users with valid Fortinet service contracts.
  3. ​​Support Requirements​​: A current FortiCare subscription (FC-10-0140D-247-02-12) is mandatory for upgrade assistance.

For bulk licensing or technical queries, contact [email protected] with your device serial number and support token.

This article synthesizes data from Fortinet’s Security Advisories and release notes for FortiOS 6.4.3. Always validate firmware checksums before deployment.

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