User's Manual

User Manual
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5.4.2 NAT
Network address translation (NAT) can be used when some hosts on a private
network have been assigned with local IP addresses (that is, private IP
addresses used only on the private network), but expect to communicate with
hosts on the Internet (without encryption).
Scenario: A user expects to access a camera on the LAN of the device through
the public network. The camera’s address is 192.168.2.100, and the opens port
18000 to provide video service.
1. Click "Firewall >> NAT", and select "DNAT" for "Action", and "Outside" for
"Source Network". Select "IP PORT to IP PORT" or "INTERFACE PORT to IP
PORT" for "Translation Type". The public IP address obtained through cellular is
not fixed, so "INTERFACE PORT to IP PORT" is more convenient. Select "TCP" for
"Transmit Protocol" because video service is transmitted over TCP. Select
"cellular 1" (dialup interface for the cellular network) for "Interface" and set