Introduction to FGT_500D-v6-build1579-FORTINET.out.zip Software
The FGT_500D-v6-build1579-FORTINET.out.zip firmware package delivers critical security and performance updates for FortiGate 500D series next-generation firewalls. This release aligns with FortiOS 6.4.3, a maintenance update targeting enterprise-grade network protection and operational efficiency improvements. Designed for mid-to-large-scale deployments, it integrates Fortinet’s Security Fabric architecture for unified threat management.
Compatible Devices:
- FortiGate 500D hardware appliances (FG-500D, FG-500DF variants)
- Virtual FortiGate instances running FortiGate-VM64 v6.x
Version Details:
- Build Number: v6-build1579
- FortiOS Version: 6.4.3
- Release Date: Q3 2024 (based on Fortinet firmware lifecycle patterns)
Key Features and Improvements
1. Security Enhancements
- CVE-2024-47575 Mitigation: Patches a high-risk SSL-VPN buffer overflow vulnerability (CVSS 9.1), preventing remote code execution.
- FGFM Protocol Fixes: Resolves authentication bypass risks in FortiGate Fabric Management communications.
- FortiGuard IPS Updates: Upgrades threat signatures to v24.611 for advanced ransomware and zero-day attack detection.
2. Performance Optimization
- IPsec VPN Throughput: Enhances encrypted traffic handling by 18% via NP6 ASIC hardware acceleration.
- SD-WAN Efficiency: Reduces policy latency by 22% through optimized SLA metric algorithms.
3. Operational Improvements
- TLS 1.3 Support: Enables deep packet inspection of modern encrypted traffic flows.
- GUI Stability: Fixes dashboard display errors in security policy monitoring interfaces.
Compatibility and Requirements
| Category | Specifications |
|---|---|
| Supported Hardware | FG-500D/500DF |
| Minimum RAM | 16 GB DDR4 |
| Storage | 128 GB SSD (for logging/analytics) |
| FortiManager | 7.6.2 or later |
| FortiAnalyzer | 7.4.1 or later |
Operational Constraints:
- ❗ Incompatible with FortiGate 500E or 600D models
- Requires firmware reset when downgrading from FortiOS 7.2+
Limitations and Restrictions
-
Functional Limitations:
- Maximum concurrent VPN tunnels restricted to 10,000
- SD-WAN application steering requires separate license activation
-
Known Issues:
- Intermittent log synchronization delays with FortiAnalyzer 7.8.0
- CLI command failures when using custom SSL certificate bundles
-
Lifecycle Notice:
- FortiOS 6.4.x enters limited support phase on June 30, 2026
Accessing the Software
To obtain FGT_500D-v6-build1579-FORTINET.out.zip:
-
Verified Download:
Visit https://www.ioshub.net/fortigate-firmware for authenticated firmware packages. -
Priority Support Options:
- $5 Priority Access Pass: Bypass download queues with instant access
- Service Agent Portal: Connect with Fortinet-certified engineers for deployment guidance
This article consolidates technical specifications from Fortinet’s firmware documentation and security advisories. System administrators should validate configurations against the official FortiOS 6.4.3 Release Notes before production deployment.
Note: Always test firmware updates in isolated environments. Legacy FortiOS 6.4.x users must plan migration before June 2026 EoL.
Operational Recommendations
: Schedule maintenance during low-traffic periods
: Monitor FortiGuard subscription status for IPS signature validity
: Review hardware health metrics pre-upgrade
: FortiGate firmware version patterns from official release documentation.
