No connection
When first trying to connect to the manual tunnel configuration, the tunnel does not come up and FortiClient returns the following error message at around 48% of connection progress:
On the FortiGate, use the CLI to verify whether traffic has been initiated to the correct interface and port:
diagnose sniffer packet port3 'port 10443' 4 0 l
Using Original Sniffing Mode
interfaces=[port3]
filters=[port 10443]
No output indicates that FortiClient is using the wrong address or port. Verify the remote gateway address, port, and realm to ensure you entered them properly.