Users with Apple Airport routers need to set up Network Translation Address (NAT) Port Mapping Protocol (UPnP). Apple's support page describes the steps in this link. The Apple community discussion thread on this subject is here. 2. Other Routers. For other routers, users will need to use the router admin interface and enable the UPnP settings.
Mar 23, 2011 Universal Plug'n'Play and NAT-PMP on OpenWrt option 'enable_natpmp' '1' option 'enable_upnp' '0'. Also, you need to apply changeset 25251: it's basically a matter of editing /etc/init.d/miniupnpd, something you can do directly on your live router using nano; please be advised that failing to apply the patch correctly miniupnpd might stop working correctly. Sonic.net • Enabling UPnP or NAT-PMP on Pace 411 Router
Feb 12, 2015
Nov 06, 2011 How do you turn on either the UPnP or NAT-PMP on your Jan 04, 2009 UniFi Security Gateway: Turning uPNP on. Xbox NAT
Configuring UPnP and NAT-PMP — pfSense Documentation
How do I enable Universal Plug and Play on my NETGEAR Jan 25, 2017