Determine whether to block or allow a session based on traffic attributes such as the source and destination security zone, the source and destination IP address, the application, user, and the service. For more details, see Security Policy.
Instruct the firewall which packets need translation and how to do the translation. The firewall supports both source address and/or port translation and destination address and/or port translation. For more details, see NAT.
Identify traffic requiring QoS treatment (either preferential treatment or bandwidth-limiting) using a defined parameter or multiple parameters and assign it a class. For more details, see Quality of Service.
Policy Based Forwarding
Identify sessions that you do not want processed by the App-ID engine, which is a Layer-7 inspection. Traffic matching an application override policy forces the firewall to handle the session as a regular stateful inspection firewall at Layer-4. For more details, see Manage Custom or Unknown Applications.
Identify traffic that requires the user to be known. The captive portal policy is only triggered if other User-ID mechanisms did not identify a user to associate with the source IP address. For more details, see Captive Portal.