Alcatel Unleashed

I found CPU usage 100% on system resoruces board
I checked the dialog and saw that
NAT port is exhausted.
Performance statistics
use command: diagnose sys top output below info

And anyone can help me ? Many thanks !

Which Firmware do you use?
There have been multiple bugs in the IPS engine in the past causing lockups of the task..

i would advice you to the fortinet forum (http://support.fortinet.com/forum/default.asp ) where more and more competent people are available.