ZyXEL p-660h-61 Benutzerhandbuch

Prestige 660H/HW Series Quick Start Guide

10

NAT (Network Address Translation - NAT, RFC 1631) means the translation of an IP address in one network to 
a different IP address in another. For example, you could translate one public IP address to multiple private IP 
addresses on your LAN (SUA Only).

The firewall is already enabled by default on the Prestige.

Click 
Advanced 
Setup and 
then NAT to 
open the 
NAT-Mode 
screen. 
Select SUA 
Only if you 
have one public IP address and Full Feature if 
you have multiple public IP addresses (for 
address translation). 

Select Enable SIP ALG to allow VoIP calls to 
pass through NAT.

If you have 
servers on your 
LAN, configure 
an SUA server 
set to have them 
visible to the 
outside. From 
the NAT - Mode 
screen click Edit 
Details and fill in 
the fields as 
shown.

Click Advanced Setup and 
then Firewall to open the 
firewall screen. The firewall 
protects your LAN from 
attacks from the Internet. No 
traffic can enter your LAN 
unless a request was 
generated on the LAN first.

Click Default 
Policy to see 
rule direction 
information. 
You can also 
disable the 
firewall here if 
you want.