Cannot access fortigate over IPSEC

Hello,

In general, you need to check these things:

- Enabled management on interface - allow ping, HTTPS, SSH

- Allow traffic from Ipsec tunnel to this interface - including these service

- Verify that no local-in policy is configured that could block the traffic

- If under administrators, you have trusted host/network configured, add subnet/host that you are trying to connect to it.

If all this looks good, do simple debug flow on that device and it will at least tell you direction which you should look. If you will see message like this "iprope_in_check() check failed, drop" it means that FortiGate is blocking it.