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IP Setup and Network Address Translation 9-3
Using Network Address Translation
The following procedure describes how to use Network Address Translation.
1. Pick a network number for your local network (referred to as the internal network). This can be any IP
address range you want. The Netopia R9100 Ethernet Router has a default IP address of 192.168.1.1. You
may choose to change this address to match a pre-existing addressing scheme. For this example, we will
use 10.0.0.0.
Note: The outside world (the external network) will not see this network number.
2. Using the internal network number, assign addresses to the local nodes on your LAN. For example, you
could assign
■ 10.0.0.1 to your Netopia R9100
■ 10.0.0.2 to a node running as a World Wide Web server
■ 10.0.0.3 to an FTP server
■ 10.0.0.4 to a Windows NT PC
■ 10.0.0.5 to a Windows 95 PC
Note: See “Associating port numbers with nodes” on page 9-5.
3. By default, Network Address Translation is enabled in the Netopia R9100. If you disabled it and now want
to reenable it:
From the WAN Configuration menu in the Main Menu screen, select WAN (Wide Area Network) Setup.
The WAN Ethernet Configuration screen appears.
Toggle Address Translation Enabled to Yes or No (Yes to enable NAT) and press Return.
WAN Ethernet Configuration
Address Translation Enabled: Yes
Local WAN IP Address: 0.0.0.0
Filter Set...
Remove Filter Set
Receive RIP: Both
Aux Serial Port... Async Modem
Data Rate (kbps)... 57.6
Aux Modem Init String: AT&F&C1&D2E0S0=1
Set up the basic IP attributes of your Ethernet Module in this screen.