I don' t think it' s only CPU calculating problem.
When the CPU keeping in 80% above, dns & pop3 &smtp is not working.
but the http still can use.So I must restart it two to three times a day.
I ask my support to do somthing about it,but no work.
If fortinet can' t help me,I think it' s too bad.
By the way,the ip bind have problem,too!!!