Add pfSense to the things you don't know. Actually, turns out what you are asking for is the default configuration. Zero extra clicks.
My configuration is different. This conversation refreshed my memory about why I disabled Suricata on LAN and run it on WAN only for specific ports. In general it has to run on LAN and not WAN since the firewall drops incoming connections anyway, if no open ports. But it defaults on WAN + LAN after installation. So the proper thing to do is to "unconfigure" the WAN, in most cases. Unless someone want to enjoy the logs.