A best practice security policy is iterative. It is a tool for safely enabling applications, users, and content by classifying all traffic, across all ports, all the time. As soon as you
Define the Initial Internet Gateway Security Policy, you must begin to monitor the traffic that matches the temporary rules designed to identify policy gaps and alarming behavior and tune your policy accordingly. By monitoring traffic hitting these rules, you can make appropriate adjustments to your rules to either make sure all traffic is hitting your whitelist application allow rules or assess whether particular applications should be allowed. As you tune your rulebase, you should see less and less traffic hitting these rules. When you no longer see traffic hitting these rules, it means that your positive enforcement whitelist rules are complete and you can
Remove the Temporary Rules.