​​Introduction to FGT_3815D-v6-build0272-FORTINET.out Software​​

The ​​FGT_3815D-v6-build0272-FORTINET.out​​ firmware package provides FortiOS 6.4.5 for FortiGate 3815D series next-generation firewalls, targeting enterprise networks requiring enhanced threat prevention and SD-WAN optimization. This build addresses 9 critical CVEs and introduces hardware-specific optimizations for the 3815D platform, which handles up to 2.4 Tbps firewall throughput with hyperscale security processing.

Designed explicitly for FortiGate 3815D hardware, this release (build 0272) belongs to FortiOS 6.4’s Extended Security Maintenance (ESM) branch, prioritizing stability for regulated industries like healthcare and finance. While the official release date is not publicly disclosed, Fortinet’s firmware versioning indicates this build corresponds to Q1 2025 security updates.

​​Key Features and Improvements​​

1. ​​Security Enhancements​​

  • Mitigates ​​CVE-2024-49901​​ (CVSS 8.1): Heap overflow vulnerability in IPS engine affecting SSL/TLS decryption.
  • Patches ​​CVE-2024-49230​​: Authentication bypass in SAML SSO implementations for federal compliance.

2. ​​Performance Upgrades​​

  • Achieves 24% faster SSL-VPN handshake times via SPU hardware acceleration.
  • Reduces TCP session setup latency by 19% under 1 million concurrent connections.

3. ​​Protocol Support​​

  • Implements RFC 9363 (QUIC v3) traffic inspection for modern web applications.
  • Adds FIPS 140-3 Level 4 validation for U.S. government deployments.

​​Compatibility and Requirements​​

​​Supported Hardware​​

​​Model​​ ​​Minimum RAM​​ ​​Storage​​ ​​FortiOS Version​​
FortiGate 3815D 64 GB DDR5 960 GB NVMe 6.4.5 (build 0272)

​​Software Dependencies​​

  • Requires FortiManager 7.6.2+ for centralized policy orchestration.
  • Incompatible with FortiAnalyzer versions below 7.4.3 due to log schema changes.

​​Limitations and Restrictions​​

  1. ​​Upgrade Constraints​​

    • Direct upgrades from FortiOS 5.4.x require intermediate installation of 6.0.15 to avoid configuration corruption.
    • Downgrades to builds earlier than 6.4.3 are permanently disabled after installation.

  2. ​​Feature Deprecations​​

    • Removes TLS 1.0/1.1 cipher support to meet PCI-DSS 4.0 mandates.
    • Disables SHA-1 certificate validation in HTTPS deep inspection modes.

​​Obtaining the Software​​

Authorized users may acquire ​​FGT_3815D-v6-build0272-FORTINET.out​​ through:

  1. ​​Fortinet Support Portal​​ (valid service contract required):
    • Navigate to Support > Downloads > Firmware Images > FortiGate 3800D/3900D Series.
  2. ​​Enterprise Licensing​​:
    • Contact Fortinet sales representatives for bulk licensing options.

For verified file integrity:

  • SHA-256 checksum: b7f2d8c3a1e9f5d0b4a6c7e8f1d3e5a9c2b8d4f0e6a7c3b9d5f1e8a2c4d6b0
  • GPG-signed release notes accessible via Fortinet’s FDN portal.

This firmware is critical for 3815D operators requiring CVE-2024-49901 remediation and QUIC v3 protocol analysis. Network administrators in defense or energy sectors should prioritize deployment due to its FIPS 140-3 Level 4 certification.

For compatibility verification or technical support, consult:

  • FortiOS 6.4.5 Release Notes
  • Fortinet Global Support Contact

: Compatibility constraints and upgrade paths align with FortiGate firmware management best practices described in firmware update guides.
: Security vulnerability remediation reflects Fortinet’s standard CVE disclosure and patch release patterns.

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