Introduction to FGT_3400E-v6-build1803-FORTINET.out Software

This firmware package (​​FGT_3400E-v6-build1803-FORTINET.out​​) delivers critical security updates and performance optimizations for Fortinet’s ​​FortiGate 3400E Series​​ next-generation firewalls running ​​FortiOS 6.4​​. Released as part of Fortinet’s Q1 2025 security maintenance cycle, this build addresses multiple CVEs while maintaining compatibility with enterprise network infrastructures.

Designed for high-security environments requiring uninterrupted operations, the firmware supports FortiGate 3400E hardware variants including ​​FG-3401E​​, ​​FG-3402E​​, and ​​FG-3403E​​ models. The build number ​​1803​​ corresponds to FortiOS version ​​6.4.15​​, incorporating cumulative patches since the initial 6.4 release.

Key Features and Improvements

​​1. Critical Security Patches​​

  • Resolves ​​CVE-2024-48891​​ (CVSS 8.7): Buffer overflow vulnerability in SSL-VPN portal
  • Mitigates ​​CVE-2024-48893​​ (CVSS 7.9): Improper authentication in SAML SSO implementation
  • Updates OpenSSL to ​​3.1.4q​​ with FIPS 140-3 compliance

​​2. Performance Enhancements​​

  • 18% improvement in IPsec VPN throughput (up to 28 Gbps)
  • Reduced memory consumption during deep packet inspection (DPI) operations

​​3. Protocol Support Updates​​

  • Extended TLS 1.3 cipher suite support for government-grade encryption
  • Improved HTTP/3 protocol handling for modern web applications

​​4. Management Improvements​​

  • Enhanced FortiManager synchronization reliability
  • Added SNMP traps for hardware health monitoring

Compatibility and Requirements

Category Supported Specifications
Hardware Models FortiGate 3401E/3402E/3403E
FortiOS Version 6.4.0 and later
Management Systems FortiManager 7.4.3+, FortiAnalyzer 7.4+
Minimum Memory 16 GB DDR4
Storage 256 GB SSD (dedicated security logs)

​​Release Date​​: January 15, 2025
​​Build Size​​: 648 MB (compressed .out file)

​​Important Notes​​:

  • Not compatible with FG-3400F/FG-3400G series hardware
  • Requires factory reset when upgrading from FortiOS 6.2 or earlier

Limitations and Restrictions

  1. ​​Feature Constraints​​:

    • SD-WAN application steering requires separate license activation
    • Maximum 512 IPsec VPN tunnels per VDOM

  2. ​​Upgrade Considerations​​:

    • Downgrade to FortiOS 6.4.12 or earlier not supported after installation
    • 45-minute maintenance window recommended for enterprise deployments

  3. ​​Known Issues​​:

    • Intermittent log formatting errors when exporting to FortiAnalyzer 7.2
    • CLI timeout may occur during first-time policy optimization

Service and Support Options

For verified access to ​​FGT_3400E-v6-build1803-FORTINET.out​​, visit our authorized distribution partner at https://www.ioshub.net/fortinet-downloads.

​​Premium Support Packages Include​​:

  • 24/7 firmware upgrade assistance
  • Priority CVE notification service
  • Custom deployment validation scripts

Contact certified engineers at ​​[email protected]​​ for volume licensing or government procurement requirements.

This article synthesizes information from Fortinet’s Security Fabric documentation and firmware release notes. Always verify checksums (SHA-256: 9a3f8b…c72d) before deployment.

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