SMC Networks ADSL Barricade SMC7204BRA - Manual (Page 70)

Configuring Network Address Translation
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of the range of private addresses you use on your network
that you want to have translated.
You can specify that data from all LAN addresses should
be translated by typing [0] (zero) in each [From] field and [255]
in each [To] field. Or, type the same address in both fields if
the rule only applies to one LAN computer.
7. In the [Global Address:] field, type the public IP address
assigned to you by your ISP.
8. Click [Submit].
9. When a page appears to confirm your change, click [Close]
to return to the [NAT Configuration] page. The new rule should
display in the [NAT Rule Configuration] table.
10. Ensure that the [Enable] radio button is selected, and then
click [Submit]. A page appears to confirm your changes.
11. Click the [Admin] tab, and then click [Commit and Reboot]
in the task bar.
12. Click [Commit] to save your changes to the permanent
memory.
The RDR rule: Allowing external access to a LAN
computer
You can create an RDR rule to make a computer on your LAN,
such as a Web or FTP server, available to Internet users without
requiring you to obtain a public IP address for that computer.
The computer's private IP address is translated to your public
IP address in all incoming and outgoing data packets.
Note: Without an RDR rule (or Bimap rule described on
page 76) the ADSL Barricade blocks attempts by
external computers to access your LAN computers.