ZyXEL Communications 662HW Series - Manual (Page 161)

Prestige 662H/HW Series User’s Guide
161 Chapter 14 Firewall Configuration
14.3.3.4 Destination Address
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?
14.4 Connection Direction Example
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.
14.4.1 LAN to WAN Rules
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
14.4.2 WAN to LAN Rules
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.