Setting the Default Network Analysis Policy

If you disable a preprocessor but the system needs to evaluate preprocessed packets against an enabled intrusion or preprocessor rule, the system automatically enables and uses the preprocessor although it remains disabled in the network analysis policy web interface. Tailoring preprocessing, especially using multiple custom network analysis policies, is an advanced task. Because preprocessing and intrusion inspection are so closely related, you must be careful that you allow the network analysis and intrusion policies examining a single packet to complement each other.