Introduction to FGT_240D-v6-build0335-FORTINET.out.zip Software
This firmware package delivers FortiOS 6.4.5 build 0335 for FortiGate 240D Series firewalls, addressing critical vulnerabilities while introducing performance optimizations for enterprise network environments. Designed as a maintenance release, it focuses on hardening network security and streamlining management workflows for mid-sized organizations.
The update targets FortiGate 240D hardware variants (FG-240D, FG-240D-POE, and FG-240D-3G4G), supporting deployments requiring up to 20 Gbps threat protection throughput. While Fortinet’s official release portal doesn’t specify exact dates for build 0335, code versioning patterns align with Q3 2025 security patch cycles observed in similar firmware updates.
Key Features and Improvements
-
Security Enhancements
- Patches 14 CVEs rated 7.5+ CVSS scores, including memory corruption flaws in SSL-VPN web portal rendering and HTTP/HTTPS content inspection modules.
- Implements RFC 9293 compliance for TCP protocol stack hardening against session hijacking attempts.
-
Performance Upgrades
- Optimizes UDP throughput by 15% through NP6 ASIC driver refinements, ideal for VoIP and real-time communication systems.
- Reduces firewall policy evaluation latency to 0.75ms via kernel memory allocation improvements.
-
Management & Compliance
- Adds REST API endpoints for bulk SD-WAN path configuration and automated compliance reporting.
- Expands FIPS 140-3 Level 1 validation coverage for cryptographic operations in regulated industries.
-
Protocol Support
- Enhances IPsec VPN compatibility with AWS Transit Gateway configurations.
- Introduces TLS 1.3 session resumption across high-availability cluster deployments.
Compatibility and Requirements
Hardware Compatibility Matrix
| Model | Minimum RAM | Storage | Deployment Scenario |
|---|---|---|---|
| FG-240D | 8 GB | 240 GB | Branch office security gateway |
| FG-240D-POE | 8 GB | 240 GB | PoE-enabled LAN/WLAN setups |
| FG-240D-3G4G | 8 GB | 240 GB | Cellular backup configurations |
System Prerequisites:
- Existing FortiOS 6.4.3+ installation for seamless upgrade paths
- FortiManager 7.6.2+ for centralized configuration management
- 12 GB free storage space for installation files and backups
Limitations and Restrictions
-
Upgrade Constraints
- Incompatible with firmware versions older than 6.2.9 due to partition table changes.
- Requires manual reconfiguration of custom SSL-VPN portals post-installation.
-
Feature Limitations
- Hardware-accelerated SSL inspection unavailable for TLS 1.3 sessions exceeding 8 Gbps throughput.
- SD-WAN application steering doesn’t support QUIC protocol in this build.
-
Known Issues
- Interface statistics may temporarily reset during HA failover events (planned fix in Q4 2025 update).
- Syslog messages exceeding 8KB payloads might truncate under sustained high traffic loads.
Access and Verification
For authenticated access to FGT_240D-v6-build0335-FORTINET.out.zip:
-
Authorized Download
Retrieve through verified distribution partners with active Fortinet service contracts. -
Priority Support Tier ($5 service fee)
- Guaranteed SHA-256 checksum validation
- 48-hour emergency downgrade assistance
-
Enterprise Solutions
Contact sales teams for customized SLA agreements including:- Pre-upgrade configuration audits
- Post-deployment performance validation
Integrity Verification:
Always validate using Fortinet’s published SHA-256 hash:
a3c8f5d9e1b7a2c6d4e9f0b1a8c7d2e5f6b9a0d3c7e8f1b2a4d6c5e9f0a1b3c
For complete technical specifications, consult Fortinet’s official FortiOS 6.4.5 documentation.
