ZyXEL P-660HNU-F1 User Guide - Page 185

Firewall, 13.1 Overview, 13.1.1 What You Can Do in this What You Need to Know

Page 185 highlights

CHAPTER 13 Firewall 13.1 Overview Use the ZyXEL Device firewall 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 and WLAN computers to go to all other networks. • blocks traffic that originates on other networks from going to the LAN and WLAN. 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 91 Default Firewall Action LAN 1 A 2 WAN 3 4 13.1.1 What You Can Do in this Chapter • Use the General screen to enable or disable the ZyXEL Device's firewall (Section 13.2 on page 186). • Use the Services screen to view the configured firewall rules and add, edit or remove a firewall rule (Section 13.3 on page 187). 13.1.2 What You Need to Know Firewall The ZyXEL Device's firewall feature physically separates the LAN/WLAN and the WAN and acts as a secure gateway for all data passing between the networks. ADSL Series User's Guide 185

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ADSL Series User’s Guide
185
C
HAPTER
13
Firewall
13.1
Overview
Use the ZyXEL Device firewall 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 and WLAN computers to go to all other networks.
blocks traffic that originates on other networks from going to the LAN and WLAN.
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 91
Default Firewall Action
13.1.1
What You Can Do in this Chapter
Use the
General
screen to enable or disable the ZyXEL Device’s firewall (
Section 13.2 on page
186
).
Use the
Services
screen to view the configured firewall rules and add, edit or remove a firewall
rule (
Section 13.3 on page 187
).
13.1.2
What You Need to Know
Firewall
The ZyXEL Device’s firewall feature physically separates the LAN/WLAN and the WAN and acts as a
secure gateway for all data passing between the networks.
WAN
LAN
3
4
1
2
A