1. Introduction to FGT_1500D-v6-build0365-FORTINET.out.zip

This firmware package (build 0365) delivers critical security updates and performance enhancements for FortiGate 1500D series next-generation firewalls running FortiOS 6.4.5. Designed for enterprise data center deployments, it addresses 11 documented vulnerabilities while improving threat inspection throughput by 22% in controlled lab environments.

Compatible with FG-1500D, FG-1500D-POE, and FG-1500D-4G hardware variants, this build achieves FIPS 140-2 Level 3 validation for government and financial sector compliance. The update specifically targets organizations requiring enhanced SD-WAN path selection algorithms and GDPR-compliant logging systems.

2. Key Features and Improvements

​​Security Enhancements​​

  • Patches CVE-2024-32715 (CVSS 9.1): Buffer overflow in SSL-VPN web portal authentication
  • Resolves CVE-2024-41903 (CVSS 8.2): Improper certificate validation in WAF profiles
  • Implements AES-256-GCM encryption for IPsec VPN tunnels (RFC 8221 compliance)

​​Performance Optimizations​​

  • 30% faster TLS 1.3 handshake processing
  • Enhanced TCP multiplexer reduces latency by 18ms in high-traffic scenarios
  • Memory allocation improvements for UTM proxy engines

​​Protocol Support Updates​​

  • QUIC protocol classification (IETF draft 34 support)
  • Extended ZTNA tags for AWS Transit Gateway integration
  • BGP/MPLS IP VPN enhancements per RFC 9136 specifications

3. Compatibility and Requirements

Hardware Model Minimum OS Version Interface Support
FG-1500D v6.2.7 24x GE RJ45, 8x SFP+
FG-1500D-POE v6.4.0 48x PoE++ ports
FG-1500D-4G v6.4.3 4G LTE modem + 24x GE

​​System Requirements​​

  • 16GB RAM minimum for threat prevention features
  • 512GB SSD storage for extended logging
  • Incompatible with FG-1500D-WIFI models

4. Limitations and Restrictions

  • Requires hardware revision 4+ for full TPM 2.0 functionality
  • Maximum 2,000 concurrent SSL-VPN connections
  • Web filtering database limited to 16M entries

5. Secure Download Access

This firmware is available through IOSHub’s authorized distribution channel. Enterprise users must:

  1. Validate hardware serial number via FortiCare portal
  2. Confirm active FortiGuard subscription status
  3. Purchase $5 decryption token through PCI-DSS compliant gateway

Volume licensing (50+ devices) requires enterprise support team coordination. All downloads include SHA-512 checksums and RSA-4096 digital signatures for verification.

​​Technical Specifications​​

  • Compressed File Size: 498MB
  • Digital Certificate: Fortinet_CA_SSL_4096_SHA384
  • Build Date: 2025-03-15 (Q1 security maintenance release)
  • End-of-Support: 2027-01-31 per Fortinet lifecycle policy

This content integrates data from Fortinet’s security advisories and firmware validation reports. Always verify cryptographic signatures using Fortinet’s public key infrastructure before deployment.

: FortiGate firmware release notes (2024-11-04) detailing compatibility matrices and performance metrics for 1500D series appliances.
: CVE-2022-40684 remediation guidelines from Fortinet’s PSIRT team, emphasizing firmware update requirements for authentication bypass vulnerabilities.

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