An obstacle here is that most of these business routers don't support UPnP. I don't want to argue the merits or pitfalls of UPnP, what's relevant is that lack o

An obstacle here is that most of these business routers don't support UPnP. I don't want to argue the merits or pitfalls of UPnP, what's relevant is that lack of it becomes an obstacle to online play for modern video game systems such as Xbox. Add to that scenarios where router type is mandated by a particular ISP (Verizon in the US is applicable here) and there's quite a few scenarios where people may have the ability t manage such a protection scheme but other factors get in the way.