See? This is why I don't like Sonicwall. Those rules are highly unclear and apparently arbitrary. If they'd just come out and say what they mean in normal IP-speak instead of trying to be friendly about it, then you might not be able to understand it, but at least I would. As it is, I don't understand it and neither do you.

It's like you have to have a SonicWall expert instead of an IP expert. Sure, Ciscos and whatnot require some expertise, but that's just based on "what's the syntax", not "what the fuck are they talking about".

My guess is that you must use an IP address on the WAN side, but you only have one IP address assigned there. I'm not sure what they mean by unique, either. Maybe they mean globally routable (that is, not in the 10/8, 172.16/12, or 192.168/16 ranges)?