4 Ports 11g Wireless ADSL2/2+ Router
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Destination IP Address:
Since it is for incoming traffic, the destination IP address is on your LAN
side.
Destination Netmask:
The destination netmask on your LAN side.
Destination Port Start:
The starting port number that will be made open for this application.
Destination Port End:
The ending port number that will be made open for this application.
Destination Port Map:
Destination port mapped on the LAN (destination) side to which packets
will be forwarded.