FortiOS_5.6.x Firmware Update for Legacy FortiGate Series – Official Release Notes & Download
Introduction to FortiOS_5.6.x FortiOS_5.6.x represents Fortinet’s foundational security operating system designed for legacy FortiGate appliances, delivering unified threat prevention and network segmentation for enterprise environments. Originally released in 2012 as part of Fortinet’s Security Fabric framework, this version remains critical...