I find it easier to do some advanced settings than adding firewall rules via uci commands. My network is a little non-standard in that my router and a few other machines are behind a cable modem, and most of the rest of the devices are behind the router. So I needed to poke a hole through the firewall to allow access to the WAN. I realize most people wouldn’t need to do this and there are other ways to make the changes, but I prefer LUCI.