To disable SSLv3 on both the FortiGate GUI and SSL VPN you need to run the below commands via CLI. According to the FortiGuard (opens in a new tab) website, the only reported compatibility issue that may follow with running the below is with IE6
For the HTTPS GUI:
config system globalset strong-crypto enableendFor SSL VPN:
config vpn ssl settingsset sslv3 disableend


