Because VirtualBox does not natively support the .qcow2 format used by KVM, a conversion is often necessary for a smooth experience.
FortiOS expects hardware acceleration. While VirtualBox doesn’t support SR-IOV or PCI passthrough perfectly, these tips help: fortigate vm virtualbox
| VirtualBox Adapter | FortiGate Interface | Typical Purpose | | --- | --- | --- | | Adapter 1 (NAT / Bridged) | port1 | Management / WAN | | Adapter 2 (Internal Network) | port2 | LAN / Internal | | Adapter 3 (Internal Network) | port3 | DMZ | | Adapter 4 (Host-Only) | port4 | Dedicated Mgmt | Because VirtualBox does not natively support the