ZyXEL Prestige 660HW-D1 Wireless Router 91-004-593003B Manual Do Utilizador

P-660H/HW-D Series User’s Guide

Chapter 10 Firewall Configuration

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This chapter shows you how to enable and configure the ZyXEL Device firewall.

The web configurator is, by far, the most comprehensive firewall configuration tool your 
ZyXEL Device has to offer. For this reason, it is recommended that you configure your 
firewall using the web configurator.CLI (Command Line Interpreter) commands provide 
limited configuration options and are only recommended for advanced users.

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

Note: The LAN includes both the LAN port and the WLAN.

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

• LAN to LAN/ Router 

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

• LAN to WAN

By default, the ZyXEL Device’s stateful packet inspection drops packets traveling in the 
following directions:

• WAN  to  LAN
• WAN  to  WAN/  Router 

This prevents computers on the WAN from using the ZyXEL Device as a gateway to 
communicate with other computers on the WAN and/or managing the ZyXEL Device.

You may define additional rules and sets or modify existing ones but please exercise 
extreme caution in doing so.

• LAN to LAN/ Router

• WAN to LAN

• LAN to WAN

• WAN to WAN/ Router