Firewalls; Chapter 10 Firewalls; Overview; What You Can Do In The Firewall Screens - ZyXEL Communications P-660HW-Tx v3 Series User Manual

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H A P T E R

10.1 Overview

This chapter shows you how to enable and configure the ZyXEL Device firewall.
Use these screens to enable and configure the firewall that protects your ZyXEL
Device and network from attacks by hackers on the Internet and control access to
it. By default the firewall:
• allows traffic that originates from your LAN computers to go to all other
networks.
• blocks traffic that originates on other networks from going to the LAN.
The following figure illustrates the default firewall action. User A can initiate an IM
(Instant Messaging) session from the LAN to the WAN (1). Return traffic for this
session is also allowed (2). However other traffic initiated from the WAN is blocked
(3 and 4).
Figure 76 Default Firewall Action
LAN
A

10.1.1 What You Can Do in the Firewall Screens

• Use the General screen
triangle route on the ZyXEL Device, and set the default action that the firewall
takes on packets that do not match any of the firewall rules.
• Use the Rules screen
rules and add, edit or remove a firewall rule.
P-660HW-Tx v3 Series User's Guide
WAN
1
2
(Section 10.2 on page
(Section 10.3 on page 196) to view the configured firewall
10

Firewalls

3
4
194) to enable firewall and/or
189