Creating and editing firewall rules

Now that we have covered some basic firewall principles, we can begin our firewall configuration with the following steps:

1. To create and/or edit firewall rules, log in to pfSense and navigate to Firewall | Rules. This should present you with a list of interfaces across the top of the page; you can see the ruleset for each interface by clicking on its name (initially, you will see the ruleset for the WAN interface, as shown):

2. Usually, we will click on the tab for the interface for which we want to credit/edit rules, although this is technically unnecessary, since we can create rules for any interface from any tab—the rule edit page provides an Interface drop-down box that allows us to choose the interface to which the rule applies. 

3. Click on the interface for which you want to add a rule and use one of the two Add buttons at the bottom of the page to create a rule.
4. The Add button with the up arrow will place the newly created rule at the top of the table, while...