Netopia R9100, User Reference Manual

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Understanding Netopia NAT Behavior C-7
Configuration
Network Address Translation is enabled by default with the Smar tStar t configuration utility. You can toggle
Address Translation Enabled to No or Yes in the WAN Ethernet Configuration screen in WAN Configuration under
the Main Menu. An example of enabling NAT is as follows:
Toggling Address Translation Enabled to Yes enables the Netopia R9100 to send out an all-zeros IPCP address
that requests an IP to be assigned to the Netopia R9100’s WAN inter face. Note that the remote IP address is
127.0.0.2, which should also be the default gateway under IP Setup in System Configuration. This is done for
profile matching purposes and because the IP address of the router the Netopia R9100 is dialing is not always
known.
As mentioned earlier in this appendix, NAT works well for IP sessions originated on the Netopia R9100’s LAN
inter face destined for the Internet without any additional configuration. For incoming IP connections from the
Internet to a host on the Netopia R9100’s LAN inter face, expor ted ser vices need to be used.
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.