UPnP is also sometimes used to refer to some forms of zeroconf/mDNS/Bonjour/DLNA. Maybe he is under the impression if he turns off UPnP on his router (the auto

UPnP is also sometimes used to refer to some forms of zeroconf/mDNS/Bonjour/DLNA. Maybe he is under the impression if he turns off UPnP on his router (the automatic port forwarding feature), that his LAN device discovery features will break?