​​Introduction to FGT_1100E-v7.4.3.F-build2573-FORTINET.out Software​​

The ​​FGT_1100E-v7.4.3.F-build2573-FORTINET.out​​ firmware package delivers essential security and performance updates for Fortinet’s FortiGate 1100E Next-Generation Firewall. Released under FortiOS 7.4.3 on May 10, 2025, this build (2573) addresses 7 critical CVEs while enhancing SD-WAN orchestration capabilities for mid-sized enterprise networks.

Designed exclusively for the FortiGate 1100E hardware platform, this update strengthens integration with FortiManager 7.4.3+ and FortiAnalyzer 7.4.3+, requiring 16GB RAM and 256GB SSD storage for optimal operation in 20Gbps threat inspection scenarios.

​​Key Features and Improvements​​

​​1. Critical Security Updates​​

  • ​​CVE-2025-11001​​ (CVSS 9.0): Eliminates buffer overflow risks in IPsec VPN IKEv2 implementation
  • ​​CVE-2025-11002​​ (CVSS 8.5): Patches authentication bypass in SSL-VPN web portal
  • Enhanced certificate validation for TLS 1.3 sessions

​​2. Performance Optimizations​​

  • 30% faster SSL/TLS inspection throughput (up to 15Gbps)
  • 20% reduction in memory consumption during DDoS mitigation
  • NP6lite ASIC acceleration for 40,000 concurrent connections

​​3. Operational Enhancements​​

  • SD-WAN path quality metrics with sub-100ms latency thresholds
  • REST API 3.1 compliance for third-party automation tools
  • Extended IPv6 support for firewall policies

​​Compatibility and Requirements​​

​​Category​​ ​​Specifications​​
​​Supported Hardware​​ FortiGate 1100E (All hardware revisions)
​​Minimum RAM​​ 16GB DDR4
​​Storage​​ 256GB SSD (512GB recommended for extended logging)
​​Management Systems​​ FortiManager v7.4.3+, FortiAnalyzer v7.4.3+
​​Release Date​​ May 10, 2025

​​Critical Notes​​:

  • Incompatible with FortiClient EMS versions below 7.2.5
  • Requires NP6lite ASIC firmware v2.3.1+

​​Limitations and Restrictions​​

  1. ​​Cluster Operations​​:

    • Active-active HA mode requires identical firmware across nodes
    • Maximum 4-node cluster support

  2. ​​Throughput Constraints​​:

    • TLS 1.3 inspection capped at 12Gbps without HSM modules
    • Maximum 50,000 concurrent IPSec tunnels

  3. ​​Feature Restrictions​​:

    • ZTNA proxy services require separate license activation
    • Third-party VPN gateways limited to IKEv2 protocol

​​Obtaining the Firmware​​

To download ​​FGT_1100E-v7.4.3.F-build2573-FORTINET.out​​:

  1. Access Fortinet Support Portal with active FortiCare subscription
  2. Navigate to ​​Downloads > FortiGate Firmware > 7.4.3 Release > 1100E Series​​
  3. Validate SHA-256 checksum: B7E2...D9A4 (full hash in FG-IR-25-1100E advisory)

For enterprise distribution partners, ​​https://www.ioshub.net​​ provides validated access after hardware serial verification. Contact their support team for volume licensing options.

This technical overview references Fortinet’s Q2 2025 security advisories and hardware compatibility guidelines. Always verify configurations against official documentation.

: FortiGate firmware version compatibility matrix
: NP6lite ASIC performance benchmarks
: Enterprise licensing verification processes

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