Right, I see what the issue is. The /localinfo -p feature uses its own optimized UPnP routine, with a hard-coded 127.0.0.1 IP address, to quickly add and remove the UPnP entry to retrieve the external IP address. Strangely, this works with the four different router brands that I use to test the UPnP implementation. I will change this to use the active interface address in the next version.
All other UPnP features should work for you though as they use your interface address. If you enable the identd UPnP option, does that work for you? Does it show the correct IP address in the routers UPnP list? You will need to disable the identd "enable when only connecting" option in order to make it persistent so you can see it in the list.
Thanks for tracking down this issue.
