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New Member

How many signatures can be enable in a 42XX appliance

Hi, cisco configure like 1300 signatures enabled by default in the signature packages for the appliances 42xx, if I want to enable more than the default configured by cisco, how many more I can enable without affecting the performance of the appliance?


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New Member

This is a difficult question

This is a difficult question ! Actually signatures are not behaviour based. They will trigger once they detect a "defined packet " after deep packet inspection processing.


You have to run them and see in your environment, how many signatures do you actually need. For example , if you are not running internet explorer or  mac computers then signatures for such things could be closed. You can search through IDM or IME for firefox , adobe, flash , xp etc tags within the signature list and tune it as per your sensitivity requirement.


Generally CPU load will be lesser than Memory Load , and reason simply being quick processing as we  all know fetching data from memory is faster .


hope this helps.