Efficient Networks® 5800 Series
User Reference Guide
Chapter 3: Additional Features
Efficient Networks®Page 3-11
from private IP addresses to the router’s public IP address, thereby concealing
the private IP addresses used on your Local Area Network (LAN). Network
Address Tr anslati on can provide a level of security by obscurity that is
acceptable to many users.
Outbound NAT Setting: Use this field to enable or disable Network Address
Transl ation of outbound traffic; communications from your LAN to the Wide
Area Network beyond your router (WAN). Click on the Apply button to
complete the new setting.
Inbound NAT Setting: This section of the form is divided into two parts. The
left side contains fields for WAN settings. The right side contains fields for local
machine settings. A section labeled "router" divides these two parts. This layout
is a simple diagram of how NAT works between the WAN and the local machine
to translate network addresses.
Two methods are available for making inbound NAT settings:
Easy Setup: You can quickly configure your inbound NAT to support the most
common network services with the Easy Setup fields. Select a network service
from the drop down list on the WAN side of the form, and then enter the IP
address of the local machine on the local machine side of the form. Click on the
Add button next to the label "Default Port#", unless you want to specify an
alternate port to use for the selected service. If you want to specify an alternate
port, use the field marked "Port#" to enter your alternate port, and press its Add
button to complete the service setup for inbound NAT.
Advanced Setup: The Advanced Setup fields give you the opt ion of assigning
specific network protocols to specific ports on the WAN side of NAT, while
mapping the WAN settings to an IP address and port number of a local machine.
1. Select the protocol from the drop dow n list.
2. Enter the first port number for the protocol in the First Port# field.
If you want to assign a range of ports for the protocol, enter the last
port number in the range in the Last Port# field.
3. In the Local Machine part of the Advanced Setup section, enter the
IP address of the local machine in the IP Address fiel d.
4. Enter the port number on the local machine for the protocol to use.
Leave this field blank if you want the local machine to use the same
port number as the WAN.
5. Press the Add button next to the Default Port# or the Port# field (as
appropriate) to finish your advanced NAT configuration. Repeat
this process for each protocol you want to configure for NAT.
Press the Reboot button to restart the router with the new NAT settings. Press
Back to Home to cancel your NAT settings and return to the home screen.