Acer Connect M5 User Manual page 28

UPnP
With UPnP enabled, the applications or host devices on the local network and the internet can
freely communicate with each other and establish functional network services for data sharing,
communications, and entertainment.
Port forwarding
Port forwarding allows external users to connect to services inside the local network (LAN).
Click + to create a new Port forwarding rule, and specify the LAN IP address, LAN ports, WAN
ports and Protocol types for traffic to be forwarded.
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