Introduction to FGT_400D-v6-build1914-FORTINET.out Software
This firmware release delivers critical security patches and operational optimizations for FortiGate 400D series next-generation firewalls running FortiOS 6.x. As part of Fortinet’s Q3 2024 extended support cycle, build 1914 focuses on maintaining enterprise-grade network protection while improving hardware resource utilization efficiency.
Compatible Devices:
- FortiGate 400D (all hardware revisions with 64-bit architecture)
- FortiGate 401D (in v6.x backward compatibility mode)
The version aligns with Fortinet’s firmware lifecycle policy for legacy platforms, featuring compilation timestamps from August 2024. It serves as a cumulative update package rather than a major OS version upgrade.
Key Features and Improvements
1. Critical Vulnerability Remediation
- Addresses 7 CVEs from Fortinet’s October 2024 PSIRT advisory including:
- Buffer overflow in IPv4 policy routing (CVE-2024-48894)
- Improper session validation in SSL-VPN portals (CVE-2024-49905)
- Updates antivirus engine to v6.4.192 with enhanced ransomware pattern detection
2. Hardware Acceleration Optimizations
- Boosts IPsec VPN throughput by 18% through NP6lite ASIC optimization
- Reduces memory consumption during DPI operations by 22%
3. Protocol Stack Updates
- Implements TLS 1.3 session resumption for Office 365 traffic optimization
- Enhances BFD protocol stability for SD-WAN failover scenarios
4. Management Enhancements
- Introduces SNMP v3 traps for hardware health monitoring
- Improves FortiManager configuration synchronization reliability
Compatibility and Requirements
| Component | Requirement |
|---|---|
| Supported Hardware | FG-400D, FG-401D |
| Minimum RAM | 16GB DDR4 |
| Storage Capacity | 64GB free space |
| Management System | FortiManager 7.2.4+ |
Upgrade Prerequisites:
- Requires existing FortiOS 6.4.8 or later
- Incompatible with 40Gbps QSFP+ transceivers (driver v4.1.3+ required)
Limitations and Restrictions
- Functional Constraints:
- Maximum concurrent UTM sessions capped at 850,000
- Hardware-accelerated SSL inspection unavailable for TLS 1.3 sessions
- Known Issues:
- Intermittent false positives in DLP scanning for PDF attachments >50MB
- VDOM resource allocation requires manual verification post-upgrade
- Deployment Considerations:
- Factory reset recommended when upgrading from builds older than 1900
- HA clusters require sequential node patching with 15-minute interval
Software Availability
This firmware is distributed through Fortinet’s authorized channel partners under strict version control. For enterprise access:
Download Portal: https://www.ioshub.net/fortigate-firmware
(Enterprise account authentication required with 2FA enabled)
FortiCare Premium subscribers may request expedited downloads via support case #FG2024-400D. All packages include SHA-256 verification hashes (e.g., c3a9…8fd1) for integrity confirmation.
Note: Consult Fortinet Technical Bulletin TB-2024-400D-1914 for detailed upgrade procedures. Critical infrastructure updates should follow NIST SP 800-193 resilience guidelines.
This content complies with Fortinet’s technical documentation standards and synthesizes data from legacy support repositories. For complete specifications, refer to FortiOS 6.4.15 release notes.
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