Policies allow you to enforce rules and take action. The different types of policy rules that you can create on the firewall are: Security, NAT, Quality of Service (QoS), Policy Based Forwarding (PBF), Decryption, Application Override, Authentication, Denial of Service (DoS), and Zone protection policies. All these different policies work together to allow, deny, prioritize, forward, encrypt, decrypt, make exceptions, authenticate access, and reset connections as needed to help secure your network. The following topics describe how to work with policy: