This setting specifies the WAN connections and Internet IP address(es) from which
the service can be accessed.
18.1 UPnP / NAT-PMP Settings
UPnP and NAT-PMP are network protocols which allow a computer connected to the LAN port
to automatically configure the router to allow parties on the WAN port to connect to itself. That
way, the process of inbound port forwarding becomes automated.
When a computer creates a rule using these protocols, the specified TCP/UDP port of all WAN
connections' default IP address will be forwarded.
Check the corresponding box(es) to enable UPnP and/or NAT-PMP. Enable these features only
if you trust the computers connected to the LAN ports.
When the options are enabled, a table listing all the forwarded ports under these two protocols
can be found at Status > UPnP / NAT-PMP .