Having built and deployed a few firewalls before launching one at home, I’d like to think I know a thing or two about getting it right. Thankfully, if you’re choosing between OPNsense and pfSense, it’s difficult to get it wrong since even as a default installation. Both are fairly secure and will do a stellar job at keeping unwanted parties from gaining access to your local area network (LAN). But there are still some things I wish I had been told when I built my first firewall.