我記得以前的fortigate可以直接在網頁GUI上改，不知道哪版開始似乎就無法在網頁改這個了，必須要透過指令改

擬透過ssh連進去fortigate後要下

FortiGate-60E # config system settings

FortiGate-60E (settings) # set opmode transparent

FortiGate-60E (settings) # set manageip 192.168.2.99 255.255.255.0

FortiGate-60E (settings) # set gateway 192.168.2.1

FortiGate-60E (settings) # end

這樣應該就可以了，如果有出現錯誤，例如

Cannot change to Transparent mode because this vdom contains managed switches and switchctl-vlans.
Please clear managed-switches, disable fortilink and retry.
node_check_object fail! for opmode transparent
Attribute ‘opmode’ value ‘transparent’ checking fail -7610
Command fail. Return code -7610

就表示你還要再新增一些指令，可以參考這篇文章

FortiGate-60E # config system interface

FortiGate-60E (interface) # edit "fortilink"

FortiGate-60E (fortilink) # set vdom "root"

FortiGate-60E (fortilink) # set fortilink disable

FortiGate-60E (fortilink) # next

照上面設定完畢後，再重新來一次最上面那個透通模式的指令，設定完成end後你應該會看到顯示Changing to TP mode後應該就可以了