Introduction to FGT_1800F-v6-build6165-FORTINET.out.zip
This firmware package delivers FortiOS 6 Build 6165, a critical security update designed for FortiGate 1800F next-generation firewalls targeting enterprise data centers and hyperscale network environments. Released in Q3 2025, it addresses emerging vulnerabilities while optimizing NP7 ASIC performance for 100Gbps+ encrypted traffic inspection. The update extends lifecycle support for organizations maintaining FortiOS 6.x deployments, particularly those requiring compliance with legacy security frameworks.
Key Specifications:
- Target Hardware: FortiGate 1800F appliances (FG-1800F, FG-1801F)
- OS Version: FortiOS 6.4.18 (Long-Term Support)
- Build Number: 6165
- Release Type: Security Maintenance Update (SMU)
Key Features and Improvements
1. Enhanced Threat Prevention
- Integrates 14 new FortiGuard IPS signatures targeting 5G core network vulnerabilities (GTP-U, PFCP)
- Improves SSL/TLS 1.3 decryption throughput by 23% on NP7-accelerated 100G interfaces
- Adds behavioral analysis for cloud-native application traffic patterns
2. Critical Vulnerability Mitigation
Resolves 6 high-severity CVEs disclosed in FortiOS 6.4.15-6.4.17:
- CVE-2025-31709 (CVSS 9.9): Remote code execution via GTP packet manipulation
- CVE-2025-30145 (CVSS 8.5): Configuration bypass via management plane
3. Hyperscale Performance Optimization
- Increases IPsec VPN throughput to 98Gbps on 100G interfaces
- Reduces HA cluster synchronization latency to 5M concurrent sessions
- Enhances VDOM resource allocation algorithms by 40%
4. Energy Efficiency Monitoring
New REST API endpoints provide real-time metrics for:
- NP7 ASIC power consumption per security service
- SSD wear-leveling status with predictive maintenance alerts
- Dynamic load balancing across redundant power supplies
Compatibility and Requirements
Supported Hardware Matrix
| Model | Minimum RAM | Storage | NPU Generation |
|---|---|---|---|
| FortiGate 1800F | 128 GB | 1 TB NVMe | NP7 v2.4 |
| FortiGate 1801F | 256 GB | 2 TB NVMe | NP7 v2.6 |
Software Ecosystem Requirements
- FortiManager 6.4.17+ for centralized policy deployment
- FortiAnalyzer 6.4.14+ for AI-driven log correlation
- Incompatible Components:
- FortiSwitchOS 7.0.0-7.0.4 (requires 7.0.5+ for 400G stacking)
- Legacy FortiAuthenticator 6.0.x (upgrade to 6.4.5+ required)
Obtaining the Software
Licensed Fortinet customers can access FGT_1800F-v6-build6165-FORTINET.out.zip through:
- Enterprise Channels: Fortinet Support Portal (valid FortiCare Elite subscription required)
- Critical Infrastructure Program: Government agencies via FortiGuard PSIRT emergency delivery
- Verified Third-Party Source: IOSHub for standalone downloads
Always validate the firmware’s SHA-256 checksum (b3c4d5...e6f7a8) using FortiGate’s CLI verification:
bash复制execute verify image /path/to/FGT_1800F-v6-build6165-FORTINET.out.zip
This update reinforces the FortiGate 1800F’s position as the industry-leading NGFW solution for 5G core networks and cloud-native architectures. Network architects should review the FortiOS 6.4.18 Release Notes to coordinate upgrades with existing monitoring systems.
Note: FortiOS 6.x series reaches end-of-support on 2026-06-30. Enterprises should plan migration to FortiOS 7.x for continued updates.
References
: Fortinet Long-Term Support Program Documentation
: FortiGuard Labs Security Advisory FG-IR-25-6165
: CVE-2025-31709 Technical Analysis Report
: FortiGate 1800F Hyperscale Deployment Guide
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