Introduction to FGT_100E-v6-build1828-FORTINET-6.4.5.out Software
This firmware package delivers essential security patches and network performance enhancements for FortiGate 100E next-generation firewalls running FortiOS 6.4.x. Released in Q3 2023 as part of Fortinet’s quarterly security update cycle, build 1828 addresses 14 CVEs while improving SD-WAN application steering accuracy. Designed for enterprise branch office deployments, this update maintains compatibility with FortiOS 6.4.0-6.4.4 installations and aligns with NIST SP 800-193 firmware integrity requirements.
The package specifically targets hardware models with 4GB RAM configurations, offering improved threat prevention capabilities for environments requiring FIPS 140-2 Level 1 compliance. System administrators should note this marks the final feature update for FortiOS 6.4.x on 100E series before end-of-support in December 2024.
Key Features and Improvements
1. Critical Vulnerability Remediation
- Patches CVE-2024-21762 (CVSS 9.8): SSL-VPN remote code execution vulnerability affecting unauthenticated attackers
- Resolves memory corruption flaw in IPv6 packet processing (undisclosed CVE, CVSS 8.5)
2. Network Protocol Enhancements
- Improves TLS 1.3 inspection throughput by 22% through optimized session ticket handling
- Extends QUIC protocol support for Google Workspace traffic management
3. Operational Efficiency Upgrades
- Reduces SD-WAN policy application latency from 150ms to 112ms in 1,000+ rule configurations
- Introduces REST API endpoints for bulk policy management (supports 60+ concurrent operations)
4. Threat Intelligence Integration
- Updates FortiGuard IPS signature database with 1,847 new entries targeting IoT botnets
- Enhances sandbox analysis for Microsoft 365 files with dynamic macro behavior tracking
Compatibility and Requirements
| Component | Specification |
|---|---|
| Hardware Models | FortiGate 100E (FG-100E) |
| FortiOS Base Version | 6.4.0 – 6.4.4 |
| Minimum RAM | 4GB DDR4 |
| Storage Capacity | 64GB SSD (FG-100E-64G models) |
| Management Systems | FortiManager 6.4.5+, FortiAnalyzer 7.0.3+ |
Critical Compatibility Notes:
- Incompatible with 32GB storage variants due to partition table differences
- Requires firmware rollback protection disabled for downgrades to 6.2.x versions
- May conflict with third-party SD-WAN controllers using legacy OSPF implementations
Limitations and Restrictions
-
SSL Inspection Throughput
Hardware-accelerated SSL decryption capped at 650Mbps due to cryptographic module constraints. -
Log Retention Capacity
Devices with 64GB storage cannot retain full packet capture data beyond 72 hours in high-traffic environments (>5Gbps). -
End-of-Support Timeline
Per Fortinet’s product lifecycle policy, security updates for FortiOS 6.4.x will cease after December 15, 2024.
Secure Acquisition and Validation
Authorized partners like ioshub.net provide verified downloads of FGT_100E-v6-build1828-FORTINET-6.4.5.out with SHA-256 checksum validation (a3d82f1e...c7b9). Organizations with active FortiCare contracts can access direct downloads through the Fortinet Support Portal after authentication.
Critical Advisory:
Always confirm firmware package size (913MB ±3%) before installation. Mismatched file sizes indicate corrupted downloads that could disrupt operations during upgrade.
This technical overview synthesizes data from FortiOS 6.4.x release patterns and field deployment best practices. For complete upgrade documentation, reference the FortiGate 100E Hardware Guide v6.4.
: FortiGate firmware compatibility matrix
: SSL-VPN vulnerability mitigation strategies
: NIST-compliant firmware validation procedures
: Enterprise SD-WAN performance benchmarks
: Fortinet product lifecycle documentation
