Security; Chapter 14 Security; Overview; What You Can Do - ZyXEL Communications Armor Z1 NBG6816 User Manual

14.1 Overview

Use these screens to enable and configure the firewall that protects your ARMOR Z1 and your LAN
from unwanted or malicious traffic.
Enable the firewall to protect your LAN computers from attacks by hackers on the Internet and
control access between the LAN and WAN. By default the firewall:
• allows traffic that originates from your LAN computers to go to all of the networks.
• blocks traffic that originates on the 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 84 Default Firewall Action
LAN
A

14.1.1 What You Can Do

• Use the IPv4 Firewall screen to enable or disable the ARMOR Z1's IPv4 firewall
page 131).
• Use the IPv6 Firewall screen to enable or disable the ARMOR Z1's IPv6 firewall
on page 133).

14.1.2 What You Need To Know

The following terms and concepts may help as you read through this chapter.
C
HAPTER
WAN
1
2
3
4
ARMOR Z1 User's Guide
130
1 4

Security

(Section 14.2 on
(Section 14.3