5.6.6 - Forticlient

The MSI installer allows for automated deployment via SCCM or Group Policy. Use the following command:

| Feature | 5.6.6 (Legacy) | 6.0.8 (Transition) | 7.2.0 (Modern) | | :--- | :--- | :--- | :--- | | | No | No | Yes | | ZTNA (Zero Trust) | No | No | Yes | | SAML VPN Auth | No | Partial (buggy) | Yes | | Cloud Management | No | No (EMS only) | FortiClient Cloud | | Resource Usage | Low | Medium | High | | Patch Status | EOL | EOL (June 2023) | Active | forticlient 5.6.6

FortiClient 5.6.6 is a build within the FortiClient 5.6 generation, which was officially supported by Fortinet from 2017 until its End-of-Life (EOL) in 2020. It was a unified endpoint protection agent that combined several critical functions into a single lightweight client. The MSI installer allows for automated deployment via

: Another repository on Scribd that includes references to the 5.6.6 admin guide along with older versions like 5.4 for comparison. Quick Setup Reference : Another repository on Scribd that includes references

During the 5.6 era, Fortinet offered a genuinely free version of FortiClient for basic antivirus and VPN. Version 5.6.6 was widely downloaded from third-party repositories. Home lab users and small businesses continue to use it because it requires no license key for VPN-only mode.