JCG JHR-N916R, Руководство пользователя

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Port forwarding -- Single port forwarding could set different internal and external ports for
some services.
IP address -- IP address of server host is the one of local host that provides services.
Protocol -- For networking protocol used by server program, DNS server uses UDP while
WEB server uses TCP etc. Both could be selected if it is not clear.
Internal port -- It is the internal network port monitored by LANS.
External port -- It is the Internet port. The router will transmit the request from the port to
internal port of designated LAN host.
Note
Forwarding ports could not be overlapped. The same external port could only be forwarded
to a host.
2. DMZ Settings
In some cases, you may need to set DMZ host to open all its ports to Internet.
Note:
DMZ host will lose protection from firewall, and be exposed to the Internet.
3.UPnP Settings
UPnP (Universal Plug and Play) is used to forward ports automatically for some
applications.
4.Passthrough