ZyXEL Communications B-5000 - Guide de l'utilisateur télécharger pdf (Page 229)

ZyAIR B-5000 User’s Guide

Firewall 28-1

Chapter 28

Firewall

This chapter shows you how to configure your ZyAIR firewall.

28.1 Background Information

Originally, the term firewall referred to a construction technique designed to prevent the spread of fire from

one room to another. The networking term “firewall” is a system or group of systems that enforces an access-

control policy between two networks. It may also be defined as a mechanism used to protect a trusted

network from an untrusted network. Of course, firewalls cannot solve every security problem. A firewall is

one of the mechanisms used to establish a network security perimeter in support of a network security policy.

It should never be the only mechanism or method employed. For a firewall to guard effectively, you must

design and deploy it appropriately. This requires integrating the firewall into a broad information-security

policy. In addition, specific policies must be implemented within the firewall itself.

28.2 Firewall Overview

The web configurator has a comprehensive firewall configuration tool. Enter the FIREWALL link to

navigate to the Tutorial screen Figure 28-1. This screen describes the general firewall settings, access control

and denial of service function. Note that the denial of service function can be viewed only when the ZyAIR

has been saved as a wireless router.

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ZyXEL Communications B-5000 - Guide de l'utilisateur Page 229