Re: VPN-Forticlient-Fortigate-Google cloud IPSEC VPN
cmd.exe "netstat -nr" on machine hosting the forticlient, do you have GCP destination?
diag debug enable
diag debug flow filter daddr x.x.x.x
diag debug flow filter saddr y.y.y.y
diag debug flow show console
diag debug flow trace start 20
# x.x.x.x == something in GCP
# y.y.y.y == FC assigned address
Initiate traffic some and investigate
Does the FGT show any action? Does it find a route? a policy? allow or drop? Encrypted or not ? Is nat disable or showing up?
Many questions , you have to do some 1st level trace and debug