i've problem with my ssl certificate on my fortigate below design before explain you problem .
Since home, i try to connect to my switch office (cisco switch SG-250) by using ssl vpn. but it's not working i've the message bellow
i look for on internet and one way to resolve that, it to allow invalid cerfiticate. i do it and now it's working but not secure.
I want to resolve without allow invalid certificate how can i make it.