Note for 2021 users: Unlike modern versions, the 2021 client does not support SAML (Single Sign-On) via embedded browser well. You may need to use "Legacy" authentication mode.
First, let’s clarify the nomenclature. "FortiClient VPN 64 2021" is not a single version number. It refers to the 64-bit architecture releases of FortiClient that were current during the calendar year 2021. forticlient vpn 64 2021
Assuming you have the correct FortiClient_6.4.5_x64.exe file (size approx. 25-30 MB for VPN-only, 120+ MB for full endpoint protection), follow these steps. Note for 2021 users: Unlike modern versions, the
Modern FortiGate firmware supports "SSL VPN via Web Portal" with a JavaScript-based tunnel. This requires no client software at all – though performance is worse. First, let’s clarify the nomenclature
The main 2021 releases were: