tcp port number...

[psme]

Yes, foobar2000 upnp server works in both setups at the same time. There is a "internet access" config in foobar2000 upnp setup page. User needs to tell foobar2000 it's public ip (or ddns). I guess once "internet access" mode is enabled, it will detect if the request is from non-local ip and return url using public ip...