2 advanced setup – ZyXEL Communications NBG410W3G User Manual

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Chapter 4 Tutorials

NBG410W3G Series User’s Guide

Figure 22 DMZ Tutorial: ADVANCED > NAT Overview

This completes basic setup of your DMZ.

4.2.2 Advanced Setup

In this scenario the file server runs an FTP (File Transfer Protocol) download service. Since
FTP is not compatible with NAT, you can use the ALG (Application Layer Gateway) to
manage FTP. (See

Chapter 18 on page 293

for more information.)

To allow FTP sessions to be initiated by users on the WAN, port-forwarding is also required
(see

Section 12.5 on page 235

for more information) and for port-forwarding the file server

needs a static IP address.

ALG Setup

To turn on the ZyXEL Device’s FTP ALG, click ADVANCED > ALG. Select Enable FTP
ALG and click Apply.

Figure 23 DMZ Tutorial: ADVANCED > ALG