Troubleshooting Tip: How to debug the RADIUS service on FortiAuthenticator for troubleshooting purposes

To access FortiAuthenticator debug logs access: 'https://x.x.x.x/debug/radius/ (Replace x.x.x.x with the FortiAuthenticator GUI IP):

• Set Max. log files size to 500 MB.
• Enter debug mode before sending the authentication request.

• Set to 500 lines, the number of lines to see more information per page.
• Send the authentication request, refresh the page, and verify the debug logs.
• Use Ctrl + F to find the username or use the search bar:

Sometimes it is necessary to have more information on Radius debug logs by entering 'Detail Debug Mode' and selecting twice 'Enter in debug mode' from https://<fac-ip>/debug/radius.

This can be done as well from the CLI of FortiAuthenticator.

debug radius 2

Download the debug log file and share it with the FortiAuthenticator support team for deep troubleshooting.

The 'Debug Mode' will always be active until the unit is rebooted or the mode is manually disabled.

Related articles:
Troubleshooting Tip: How to work with FortiAuthenticator Technical Support. 

Troubleshooting Tip: How to debug FortiAuthenticator Services.