Around version 6.0 and into 6.2, Fortinet began aggressively shifting its strategy. They unbundled the suite. The modern FortiClient is primarily a dashboard—a "fabric agent" designed to integrate with the broader Fortinet Security Fabric. In this new paradigm, the VPN functionality is often treated as a module to be pushed down from a FortiGate firewall or an EMS (Enterprise Management Server) controller, rather than a standalone binary residing comfortably on a hard drive.
When downloading older versions of FortiClient VPN, users should exercise caution: forticlient vpn download older versions
By following this guide, you avoid the malware traps of the public internet and keep your legacy remote access secure—even if you are running a ten-year-old firewall. Around version 6