ZyXEL ADSL Prestige 662HW-61 130122.0662HW61 Benutzerhandbuch

Prestige 662H/HW Series User’s Guide

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Chapter 14 Firewall Configuration

What is the connection’s destination address; is it on the LAN, DMZ, WAN? Is it a single IP, a 
range of IPs or a subnet?

This section describes examples for firewall rules for connections going from LAN to WAN 
and from WAN to LAN. Rules for the DMZ work in a similar fashion.

LAN to LAN/ Router, WAN to WAN/ Router and DMZ to DMZ/Router rules applies to 
packets coming in on the associated interface (LAN, WAN, or DMZ respectively). LAN to 
LAN/ Router means policies for LAN-to-Prestige (the policies for managing the Prestige 
through the LAN interface) and policies for LAN-to-LAN (the policies that control routing 
between two subnets on the LAN). Similarly, WAN to WAN/ Router and DMZ to DMZ/ 
Router polices apply in the same way to the WAN and DMZ ports.

The default rule for LAN to WAN traffic is that all users on the LAN are allowed non-
restricted access to the WAN. When you configure a LAN to WAN rule, you in essence want 
to limit some or all users from accessing certain services on the WAN. See the following 
figure.

Figure 58   LAN to WAN Traffic

The default rule for WAN to LAN traffic blocks all incoming connections (WAN to LAN).  If 
you wish to allow certain WAN users to have access to your LAN, you will need to create 
custom rules to allow it. 

See the following figure.