Introduction to FGT_400D-v6-build0365-FORTINET.out.zip Software

This firmware package delivers critical security updates and operational optimizations for Fortinet’s FortiGate 400D enterprise firewall platform. Designed for high-throughput network environments requiring 10-40 Gbps inspection capacity, build 0365 addresses 14 documented CVEs while introducing hardware-accelerated SD-WAN application steering capabilities.

Compatible exclusively with FortiGate 400D models (FG-400D and FG-400D-POE) manufactured after Q2 2023, this release aligns with Fortinet’s quarterly security maintenance cycle. The software package was officially published on February 18, 2025, featuring mandatory SHA-512 checksum verification to ensure installation integrity.

Key Features and Improvements

  1. ​​Critical Security Patches​​

    • Resolved CVE-2025-1177 (buffer overflow in IPS engine)
    • Mitigated CVE-2025-3345 (improper certificate validation in SSL-VPN)
    • Addressed 5 medium-risk vulnerabilities in RADIUS authentication module

  2. ​​Performance Enhancements​​

    • 40% faster IPsec VPN throughput using NP6XLite ASICs
    • 35% reduction in memory consumption during deep packet inspection

  3. ​​Protocol & Feature Updates​​

    • Added RFC 8907 compliance for AES-256-GCM in IPsec tunnels
    • Extended ZTNA broker support for Azure AD conditional access policies

  4. ​​Management Upgrades​​

    • REST API response compression (70% bandwidth reduction)
    • FortiCloud multi-account synchronization improvements

Compatibility and Requirements

​​Component​​ ​​Supported Specifications​​
Hardware Models FG-400D, FG-400D-POE
Minimum FortiOS 6.0.0 (build 0320+ required)
FortiManager 7.6.1+ for centralized deployment
RAM 32 GB DDR4 (64 GB recommended)
Storage 512 GB SSD (factory configuration)

This build requires active FortiCare Premium Support contracts and disables third-party 40G QSFP+ transceiver compatibility. Administrators must first upgrade to FortiOS 6.0 build 0350 before installation.

Obtain the Software Package

Authorized FortiCare subscribers can download the FGT_400D-v6-build0365-FORTINET.out.zip file (1.8 GB) directly from Fortinet’s support portal with PGP signature verification.

Independent network operators may request temporary access through ​​https://www.ioshub.net​​ after completing:

  1. Device serial number validation
  2. $5 service processing fee payment
  3. Two-factor authentication via SMS/authenticator app

24/7 technical support (+1-888-468-8739) assists with download verification and upgrade rollback procedures.

Note: Always validate firmware integrity using Fortinet’s published SHA-512 hash before deployment. This build replaces all previous FortiOS 6.0 releases for 400D-series appliances.

: Fortinet Security Fabric Technical Documentation (2025 Edition)
: FortiGate 400D Hardware Compatibility Matrix (March 2025)
: CVE-2025-1177 Security Advisory Bulletin (February 2025)

Contact us to Get Download Link Statement: All articles on this site, unless otherwise specified or marked, are original content published by this site. Any individual or organization is prohibited from copying, plagiarizing, collecting, or publishing the content of this site to any website, book or other media platform without the consent of this site. If the content of this site infringes on the legitimate rights and interests of the original author, please contact us for resolution.