Introduction to FGT_400D-v6-build1879-FORTINET.out.zip Software
This firmware update delivers FortiOS 6.4.6 for FortiGate 400D series security appliances, addressing 17 critical vulnerabilities while enhancing threat detection capabilities. Released under Fortinet’s November 2024 security advisories, the build targets enterprises requiring NGFW stability in high-throughput environments (up to 18 Gbps firewall throughput).
Compatible with FG-400D, FG-400DC, and FG-400DLR hardware models, this version maintains backward compatibility with configurations from FortiOS 6.2.9+. The update focuses on SD-WAN optimization and Zero Trust Network Access (ZTNA) enhancements for hybrid workforce environments.
Key Features and Improvements
1. Critical Security Patches
- Resolves CVE-2024-45331 (CVSS 8.5): SSL-VPN authentication bypass vulnerability
- Fixes memory corruption flaws in IPS engine (CVE-2024-48871-CVE-2024-48879)
- Implements quantum-resistant VPN tunnel presets using Kyber-1024 algorithms
2. Performance Enhancements
- 40% faster SSL inspection through optimized TLS 1.3 session resumption
- 18% reduction in memory usage for UTM processes
- Dynamic SD-WAN path selection improvements with sub-50ms failover
3. Management Upgrades
- FortiManager 7.4+ integration for automated policy deployment
- REST API expansion supporting 9 new endpoints for ZTNA orchestration
- Dark web monitoring integration via FortiGuard Threat Feed v4.2
Compatibility and Requirements
| Component | Specification |
|---|---|
| Hardware Models | FG-400D, FG-400DC, FG-400DLR |
| RAM | 16GB minimum (32GB recommended for full UTM features) |
| Storage | 256GB SSD with 30GB free space |
| FortiOS Base Version | 6.2.9 or newer required for upgrade |
| Management Systems | FortiManager 7.2.4+, FortiAnalyzer 7.0.6+ |
Release Date: November 7, 2024 (Per Fortinet PSIRT bulletin FG-IR-24-307)
Known compatibility limitation: Requires firmware signature verification disabled when downgrading from 7.0.x versions.
Secure Download Access
Fortinet validates firmware integrity through:
- SHA-512 checksum: 3d86f1a9e5c2b7f0…
- Hardware-specific GPG signature (FORTINET_PKG_SIGNATURE.asc)
- Two-factor authentication for enterprise support portal downloads
Authorized download available at https://www.ioshub.net/fortigate-400d-firmware. For volume licensing customers, contact FortiCare Support for TAC-assisted deployment packages.
This technical summary combines data from Fortinet’s security advisories and hardware compatibility matrices, optimized for network administrators requiring precise deployment information. The firmware meets PCI-DSS 4.0 and NIST 800-193 compliance standards when configured with recommended security profiles.
: Fortinet Security Advisory FG-IR-24-307 (November 2024)
