ZyXEL Communications ZyWALL 2 Plus User Manual
Page 194
Chapter 11 Firewall
ZyWALL 2 Plus User’s Guide
194
By default, the ZyWALL allows packets traveling in the following directions.:
By default, the ZyWALL drops packets traveling in the following directions.
• LAN to LAN
These rules specify which computers on the LAN can manage the
ZyWALL (remote management) and communicate between networks or
subnets connected to the LAN interface (IP alias).
"
You can also configure the remote management
settings to allow only a specific computer to
manage the ZyWALL.
• LAN to WAN These rules specify which computers on the LAN can access which
computers or services connected to the WAN. See
for an example.
• WAN to LAN
These rules specify which computers connected to the WAN can
access which computers or services on the LAN. For example, you
may create rules to:
• Allow certain types of traffic, such as Lotus Notes database
synchronization, from specific hosts on the Internet to specific
hosts on the LAN.
• Allow public access to a Web server on your protected network.
You could also block certain IP addresses from accessing it.
"
You also need to configure NAT port forwarding
(or full featured NAT address mapping rules) to
allow computers on the WAN to access devices
on the LAN. See
an example.