Chapter 1 What’s New for FortiOS 5.2.1 : New features in FortiOS 5.2 Patch 1 : Redirect kernel messages to non-console terminals
  
Redirect kernel messages to non-console terminals
To be able to see kernel messages from ssh or telnet which needed when customer unit is accessible remotely, the following command has been added:
 
diagnose debug application kmiglogd <Integer>
<Integer> is the debug level. For example, 1 would be the maximum log level in kernel to be shown.