I have an ASA 5510 with an SSM-10 module. I have global correlation turned on and updating. When I look at the dashboard's "Global Correlation Report" I see packets that have been denied by global correlation. Can someone tell me how global correlation events are logged? I'd like to be able to see the raw data associated with the global correlation.
Take a look at this:
As can be seen, whenever "global correlation" causes any kind of action to be taken by the IPS it produces an alert unless the packet is being denied by "reputation filtering" which does not produce any kind of alert. Also, "This feature only applies to global correlation inspection where the traffic is allowed if no specific signature is matched".
I am not sure of all those fields in then alert but i have seen at least some of them. If you are not seeing any alerts with those fields, then global correlation may not be seeing any instances where it has had to modify the risk ratings and take appropriate actions for it, that is, you may not be receiving any kind of such packets from malicious hosts at all in the first place.
Also, if you have "reputation filtering" on, you might want to turn it OFF to ensure it is not causing this behavior.