User Manual Part 2

Residential Gateway Family User’s Guide Configuring Advanced Features

Address Translation With NAPT

Many applications require special port access to the Internet in order to function. By enabling Network

Address Port Translation (NAPT), multiple computers in your home network have access to the Internet

by translating port addresses to an Internet IP address while masking their IP addresses from outside

users. Only TCP, UDP, and ICMP protocols support NAPT.

To enable and configure NAPT address translation:

1. Select Port By-Pass (NAPT) from the “

Address Translation (NAT/NAPT)” window.

2. Click the Configure hyperlink next to Port By-Pass (NAPT). This displays the “Port-By-Pass

Configuration” window.

3. To enable an application for NAPT, click the desired application from the Available Applications

list. The application is moved to the Enabled Applications list.

4. Optionally, click the Add a custom bypass entry hyperlink. This displays the advanced features on

the Port By-Pass Configuration” window. The advanced option allows you to configure special port

access to the Internet.