Creating a firewall rule in pfSense is easy, even if getting it to do exactly what you want isn't. To begin, navigate to Firewall | Rules. The Rules page has several tabs:

• Each subnet gets its own tab. Thus, every non-VLAN interface gets a separate tab, and every VLAN gets a separate tab.
• The leftmost tab is Floating, which is devoted to floating rules–rules that can apply to more than one interface and that can apply to traffic in both directions.
• If you have configured VPNs, each different VPN protocol gets its own tab (for example, IPsec and OpenVPN):

Creating a rule involves the following steps:

1. Once you have navigated to Firewall | Rules, click on the tab for the subnet for which you want to create the rule.
2. Click on one of the Add buttons to add a new rule. One button has an up arrow and the other has a down arrow. The Add button with...