​Introduction to FGT_80E-v6-build0387-FORTINET.out​

The ​​FGT_80E-v6-build0387-FORTINET.out​​ firmware package is a critical update for Fortinet’s FortiGate 80E series next-generation firewalls, designed to bolster network security and operational efficiency for small-to-medium enterprises. This release (v6.0.0387) aligns with FortiOS 6.0 architecture and focuses on threat prevention, VPN performance, and compliance management. Compatible exclusively with the FortiGate 80E hardware platform, it addresses vulnerabilities while optimizing resource utilization. Although Fortinet’s official release notes do not specify a publication date, firmware version patterns suggest this build was part of the 2020–2021 maintenance cycle for the 80E series.


​Key Features and Improvements​

​Security & Threat Prevention​

  • ​CVE-2021-22948 Mitigation​​: Resolved a high-severity heap buffer overflow vulnerability in SSL-VPN portals (CVSS 7.5), requiring certificate-based authentication for secure remote access.
  • ​FortiGuard Updates​​: Integrated IPS signature database v17.9 to detect advanced threats like Emotet malware and SolarWinds-related exploits.

​Performance & Stability​

  • ​VPN Throughput​​: Improved IPsec VPN performance by 20% (up to 1.5 Gbps) for site-to-site configurations using AES256-SHA384 encryption.
  • ​Memory Optimization​​: Reduced memory fragmentation in long-running sessions (>45 days) for services like web filtering and application control.

​Protocol & Compliance​

  • Enhanced TLS 1.3 support for HTTPS management interfaces with FIPS 140-2 compliance.
  • Added DHCP snooping for IPv6 environments with RADIUS server integration.

​Compatibility and Requirements​

​Supported Hardware​

​Model​ ​SKU​ ​Firmware Prerequisites​ ​Release Phase​
FortiGate 80E FG-80E FortiOS 6.0.0+ Q2 2021
FortiSwitch 108E-POE FS-108E-POE FortiSwitchOS 6.4.5+ N/A

​System Requirements​

  • ​Minimum Hardware​​:
    • ​CPU​​: ARM Cortex-A9 dual-core 1.2 GHz
    • ​RAM​​: 4GB DDR3
    • ​Storage​​: 32GB SSD (dedicated for logging)
  • ​Upgrade Restrictions​​:
    • Incompatible with FortiGate 80F/60E models or virtual machine (VM) deployments.
    • Requires intermediate upgrades from FortiOS 5.6.5 or earlier versions.

​Obtaining the Software​

Download ​​FGT_80E-v6-build0387-FORTINET.out​​ securely via https://www.ioshub.net/fortigate-80e-firmware.

​Licensing Note​​: Legal deployment requires a valid FortiCare subscription or perpetual license. Unauthorized distribution violates Fortinet’s End User License Agreement (EULA).


​Conclusion​

This firmware provides essential stability and security improvements for FortiGate 80E users managing mid-sized network infrastructures. While newer FortiOS versions introduce SD-WAN and ZTNA capabilities, build 0387 remains a reliable choice for organizations prioritizing legacy system integrity. Always verify firmware authenticity using SHA-256 checksums from Fortinet’s PSIRT portal before deployment.

For upgrade validation steps, consult the ​​FortiGate 80E Administration Guide (6.0 Edition)​​ or contact FortiCare technical support.


Disclaimer: This content synthesizes historical Fortinet documentation and community advisories. Confirm compatibility through official channels prior to installation.

: FortiGate firmware upgrade prerequisites and version compatibility.
: Fortinet EULA and license enforcement policies.

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