You would follow the instructions, simply making the rule on the web GUI. Since you really don't provide any detail on what problems you're having with the web GUI after reading the wiki, just let us know if you run into any problems.
To block LAN-to-LAN traffic the devices need to be placed on 2 different LANs first, as LAN traffic never touches the firewall, hence can never block them from reaching other LAN devices
Yes; but be advised that some new devices (e.g. smart phones) rotate their wireless MACs for security purposes
OK, in this example it seems you want to block the device from reaching WAN, yes this is possible in your current example - as the traffic would pass thru the router from LAN to WAN (so it can be firewalled).
Hi @lleachii I can give you an example . For example, I have a mobile phone that:
Wan = full access
Lan = only some devices such as printer and obviously router for routing. So selective access on the LAN (indicating each host).
Devices on the LAN not mentioned must not communicate with the mobile phone.