ZyXEL Communications G-2000 Plus - Manual (Page 196)

ZyAIR G-2000 Plus User’s Guide
195 Chapter 15 Firewall Screens
15.4 Connection Direction Examples
This section describes examples for firewall rules for connections going from LAN to WAN
and from WAN to LAN.
LAN to LAN/ZyAIR and WAN to WAN/ZyAIR rules apply to packets coming in on the
associated interface (LAN or WAN respectively). LAN to LAN/ZyAIR means policies for
LAN-to-ZyAIR (the policies for managing the ZyAIR 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/ZyAIR polices apply in the same way to the WAN ports.
15.4.1 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 79 LAN to WAN Traffic
15.4.2 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.