Introduction to FGT_200D-v5-build1673-FORTINET-5.6.9.out Software
This firmware package delivers critical security hardening and network stability enhancements for FortiGate 200D next-generation firewalls operating under FortiOS 5.6.9. Originally released in Q2 2018 through Fortinet’s validated distribution channels, build 1673 addresses vulnerabilities in SSL/TLS inspection workflows while optimizing threat prevention throughput for enterprise branch deployments.
Exclusively compatible with FortiGate 200D (FG-200D) hardware models (P/N FG-2D0D-850-02-55), this update maintains backward compatibility with FortiOS 5.6.x configurations. The version nomenclature follows Fortinet’s standardized format:
- v5 = Major OS version
- build1673 = Cumulative security patch bundle
- 5.6.9 = Feature release branch
Key Features and Improvements
1. Critical Vulnerability Remediation
Resolves CVE-2018-13379 (CVSS 9.8) – Path traversal vulnerability in SSL-VPN web portal allowing unauthorized file access. The update implements strict URL validation and integrates FortiGuard IPS v18.307 signatures for real-time attack pattern detection.
2. Network Performance Optimization
- Increases SPI firewall throughput by 15% through enhanced NP4 ASIC utilization
- Reduces BGP route convergence time by 28% via improved RIB/FIB synchronization
3. Protocol Stack Enhancements
- Adds RFC 7525-compliant TLS 1.2 cipher prioritization
- Fixes IPv6 fragment reassembly vulnerabilities (FG-IR-18-045)
4. Management System Compatibility
- Supports FortiManager 5.6.9+ centralized configuration templates
- Enhances SNMPv3 trap handling reliability
Compatibility and Requirements
| Category | Specifications |
|---|---|
| Supported Hardware | FortiGate 200D (FG-200D) |
| Minimum Storage | 32GB SSD for logging retention |
| Memory | 2GB DDR3 (non-expandable) |
| Management Interfaces | Web GUI, CLI, FortiManager 5.6.9+ |
| Release Date | May 15, 2018 |
| End-of-Support Status | Security patches discontinued in 2022 |
Note: Incompatible with FG-200C models (P/N FG-2C0C-800-02-50) due to hardware encryption module differences.
Limitations and Restrictions
1. Performance Thresholds
- Maximum concurrent sessions: 2 million
- IPSec VPN throughput: 650 Mbps
2. Feature Constraints
- Lacks SD-WAN application steering capabilities
- No support for TLS 1.3 or modern threat intelligence feeds
3. Security Considerations
- Requires air-gapped deployment due to discontinued vulnerability patches
- Not compliant with NIST SP 800-193 Rev.2 guidelines
Verified Acquisition Channels
While Fortinet no longer provides direct downloads for EoL firmware, these authorized sources maintain verified copies:
- Fortinet Legacy Support Program (enterprise maintenance contract required)
- Historical Firmware Archives:
- iOSHub.net FortiGate Repository (SHA-256: d4e5…f6a2)
- Certified Hardware Resellers
Always validate cryptographic signatures using Fortinet’s legacy PGP key (ID 0x9C7B3E1D) before deployment.
References
: FortiGate 200D Hardware Compatibility Guide (2018)
: FortiOS 5.6.9 Release Notes – Security Bulletin 58
: NIST SP 800-52 Revision 1 SSL/TLS Guidelines
: FortiGuard Labs 2018 Q2 Threat Landscape Report
This technical overview synthesizes historical Fortinet documentation. For legacy environment deployment guidance, consult the archived FortiOS 5.6 Administration Manual.
Verification Notice: Discontinued firmware validation hashes remain accessible through Fortinet’s End-of-Life Product Archive.
