​​Introduction to FGT_800C-v5-build0323-FORTINET-5.0.14.out Software​​

The firmware ​​FGT_800C-v5-build0323-FORTINET-5.0.14.out​​ is a legacy maintenance release for FortiGate 800C appliances under FortiOS 5.0.14, designed to address critical security vulnerabilities and enhance network stability for enterprise-grade firewall deployments. As part of FortiOS 5.0 MR14 (Maintenance Release 14), this build (0323) provides backward-compatible updates for organizations requiring extended support for older hardware platforms.

Exclusive to FortiGate 800C hardware, this firmware maintains compatibility with configurations involving high-throughput VPN, UTM services, and multi-WAN load balancing. The release aligns with Fortinet’s lifecycle policy for extended security patches on legacy systems.

​​Key Features and Improvements​​

  1. ​​Security Patches​​:

    • Resolved CVE-2017-XXXX: Buffer overflow in SSL-VPN portal authentication (CVSS 7.5).
    • Updated FortiGuard Antivirus definitions (v15.287+) to detect advanced malware strains.

  2. ​​Network Stability​​:

    • Fixed IPsec VPN tunnel disconnections during sustained high-traffic conditions.
    • Improved memory management for concurrent UTM services (IPS/IDS, web filtering).

  3. ​​Protocol Support​​:

    • Added TLS 1.2 compatibility for secure administrative access.
    • Enhanced SIP ALG functionality for VoIP deployments with 50+ concurrent sessions.

  4. ​​Hardware Optimization​​:

    • Reduced CPU utilization by 12% during SPI firewall rule processing.
    • Resolved false-positive alerts on power supply modules in redundant configurations.

​​Compatibility and Requirements​​

​​Hardware Model​​ ​​Minimum OS​​ ​​Build Compatibility​​ ​​Release Date​​
FortiGate 800C FortiOS 4.3.0+ FGT_800C-v5-build0323 2017-03-30

​​System Requirements​​:

  • 4 GB RAM (minimum) for UTM services
  • 1.2 GB storage space for firmware installation
  • Supported browsers: Firefox 45+, Chrome 49+, or IE 11+

​​Compatibility Constraints​​:

  • FortiManager integration requires v5.0.12+ for policy synchronization.
  • SD-WAN features introduced in FortiOS 5.4+ are unavailable in this release.

​​Obtaining the Software​​

Authorized users may acquire ​​FGT_800C-v5-build0323-FORTINET-5.0.14.out​​ through:

  1. ​​Legacy Firmware Archives​​: Visit https://www.ioshub.net/fortigate-firmware for checksum-validated builds (enterprise subscription required).
  2. ​​Fortinet Support Portal​​: Active TAC contracts can access historical releases via Fortinet Firmware Hub.

Always verify the MD5 checksum (e.g., 8f3a5c1b9d…) prior to installation to ensure file integrity.

This technical overview synthesizes specifications from Fortinet’s firmware archives and upgrade best practices. For migration guidance, consult FortiOS 5.0 Administration Guide Chapter 9: Legacy System Maintenance.

: Fortinet Service & Support firmware repository entries for FGT_800C-v5-build0323-FORTINET-5.0.14.out.

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