ZyXEL Communications 70 Series User Manual

ZyWALL 5/35/70 Series User’s Guide

Chapter 11 Firewall Screens

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This chapter shows you how to configure your ZyWALL firewall.

The web configurator is, by far, the most comprehensive firewall configuration tool your 
ZyWALL has to offer. For this reason, it is recommended that you configure your firewall 
using the web configurator. SMT screens allow you to activate the firewall. CLI commands 
provide limited configuration options and are only recommended for advanced users, please 
refer to 

 for firewall CLI commands.

Firewall rules are grouped based on the direction of travel of packets to which they apply:

Note: You can only use the wireless LAN feature if a compatible ZyXEL wireless LAN 

card is installed.

By default, the ZyWALL’s stateful packet inspection allows packets traveling in the following 
directions:

• LAN to LAN/ZyWALL 

This allows computers on the LAN to manage the ZyWALL and communicate between 
networks or subnets connected to the LAN interface.

• LAN to WAN
• LAN to DMZ
• LAN to WLAN
• WAN  to  DMZ 
• DMZ  to  WAN

• LAN to LAN/ZyWALL

• WAN  to  LAN

• DMZ  to  LAN

• LAN to WAN

• WAN to WAN/ZyWALL

• DMZ  to  WAN

• LAN to DMZ

• WAN  to  DMZ

• DMZ to DMZ/ZyWALL

• LAN to WLAN

• WAN  to  WLAN

• DMZ  to  WLAN

• WLAN to LAN 

• WLAN to WAN

• WLAN to DMZ

• WLAN to WLAN/ZyWALL