Technical Tip: Fix CLI console from FortiGate GUI

FortiGate.

Scenario:

1. The administrator is able to access and log in to the GUI.
2. SSH is accessible via the terminal.
3. When CLI is opened from the GUI, it is not responding, showing the error 'Connection lost. Enter to start a new session.'
   
   

4. Access the CLI via SSH: Technical Tip: How to connect to FortiGate using SSH. Change the 'admin-sport' in global settings. Make sure that the port does not have a port conflict (SSL VPN, VIP and other services). In this case, 443 --> 4443:

It will now be possible to close the GUI and log back in using the new admin-sport.

Clear the browsing history of the browser, and restart it. It should work fine. If not, try another browser or open a new incognito tab on the preferred browser.

5. Restart httpsd daemon.

fnsysctl killall httpsd

6. Change the admin-server certificate in the system global settings.

If the issue persists, contact Fortinet TAC for further assistance.

Related documents:

• Technical Tip: How to open the CLI window in GUI
• Connecting to the CLI - FortiGate cookbook
• Technical Tip: How to fix CLI error message 'Connection lost. Press Enter to start a new connection' in the GUI