All IPS signatures showing as Inactive in your screenshot have a performance impact rating of High or Critical. Your TP profile states that all signatures with a performance impact of Medium or lower should be activated, thus inactivating all signatures with a High or Critical performance impact. Activating IPS signatures with a High or Critical performance impact can have an adverse effect on firewall CPU load, as IPS signatures with a performance rating of High are handled approximately 50% in the Medium Path/PXL and 50% in the Firewall Path/F2F, while signatures with a Critical performance impact are handled 100% in the Firewall Path/F2F. This adverse performance impact can be particularly noticeable on firewalls with less than 8 cores.
Gateway Performance Optimization R81.20 Course
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