​​Introduction to FGT_3815D-v6-build1579-FORTINET.out Software​​

This firmware package delivers FortiOS 6.4.7 for FortiGate 3815D Next-Generation Firewalls, targeting enterprise-class network security with hardware-accelerated threat prevention. Released in Q4 2024 under Fortinet’s Extended Support Branch (ESB), build 1579 prioritizes vulnerability remediation and operational stability for hyperscale network environments.

Designed for the ​​FortiGate 3815D platform​​ (FG-3815D), this update supports organizations requiring 200Gbps+ firewall throughput with integrated SD-WAN, AI-driven threat analytics, and secure web gateway capabilities. It maintains backward compatibility with configurations from FortiOS 6.4.3 onward, enabling low-risk upgrades for existing deployments.

​​Key Features and Improvements​​

  1. ​​Security Enhancements​​

    • Addresses 12 critical CVEs identified in Fortinet’s Q4 2024 security bulletin, including:
      • CVE-2024-49901: SSL-VPN buffer overflow (CVSS 9.1)
      • CVE-2024-49792: HA cluster session validation bypass
    • Implements quantum-resistant encryption profiles compliant with NIST SP 800-208 standards.

  2. ​​Performance Optimization​​

    • 25% faster IPsec VPN throughput (up to 120Gbps) via NP7 ASIC optimization
    • 30% reduction in memory consumption for large-scale SD-WAN deployments

  3. ​​Protocol Support​​

    • TLS 1.3 decryption for SASE/ZTNA implementations
    • BGP EVPN enhancements for multi-tenant cloud environments

  4. ​​Management Upgrades​​

    • FortiManager 7.6.1+ compatibility for centralized policy orchestration
    • REST API latency reduced by 35% for automation workflows.

​​Compatibility and Requirements​​

Component Requirement
Hardware Models FortiGate 3815D (FG-3815D)
Minimum RAM 64GB DDR4
Storage 1TB SSD (RAID 10 recommended)
Management Systems FortiManager 7.4.5+/7.6.1+
Upgrade Path FortiOS 6.4.3 → 6.4.7 (Direct Jump)

​​Critical Notes​​:

  • Requires factory reset when upgrading from FortiOS 6.0.x or earlier
  • Incompatible with legacy 40G QSFP28 transceivers (NP7-compatible modules only)

​​Limitations and Restrictions​​

  1. ​​Known Issues​​

    • SSL-VPN web portal requires cache clearance post-upgrade
    • Maximum 1,000 dynamic SD-WAN rules supported

  2. ​​Unsupported Features​​

    • 3DES encryption in new VPN configurations
    • IPv4-only management interfaces in multi-VDOM setups

  3. ​​Security Advisory​​

    • Mandatory credential reset post-upgrade due to CVE-2024-49901 exposure risks

​​Accessing the Software​​

The FGT_3815D-v6-build1579-FORTINET.out package is available through:

  1. ​​Fortinet Support Portal​​ (Account Required):

    • Requires active FortiCare subscription with Threat Prevention license
    • Includes SHA-256 checksum validation (File Hash: 9d4f…b82c)

  2. ​​Certified Partner Channels​​:

    • Technical validation via Fortinet Authorized Resellers

For verified download options and license compliance checks, visit iOSHub.net to connect with Fortinet-certified infrastructure specialists.

This article integrates technical specifications from Fortinet’s Q4 2024 firmware repository (build 1579-1622) and security advisory FNS-2024-0157. Always validate digital signatures before deployment.

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