PC Concepts Full-Rated Router ADSL2+ - Manual (Page 75)

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Config IP Address and Net Mask: The IP address and network mask you want to assign to
the interface.
Gateway Address: The external IP address that the ADSL/Ethernet router communicates with
via the IPoA interface to gain access to the Internet. This is typically an ISP server.
Status: A green or red ball will display to indicate that the interface is currently up or down,
respectively. You cannot manually enable or disable the interface; a down interface may
indicate a problem with the DSL connection or with the remote peer computer.
5.7 Services
5.7.1 NAT
Network Address Translation is a method for disguising the private IP addresses you
use on your LAN as the public IP address you use on the Internet. You define NAT rules that
specify exactly how and when to translate between public and private IP addresses.