ZyXEL Communications ZyAIR B-5000, User Manual

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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.