Firewall; Chapter 13 Firewall; Overview; What You Can Do - ZyXEL Communications LTE2566-M634 User Manual

13.1 Overview

Use these screens to enable and configure the firewall that protects your LTE2566-M634 and your LAN
from unwanted or malicious traffic.
Enable the firewall to protect your LAN devices 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 devices 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 64 Default Firewall Action

13.1.1 What You Can Do

• Use the General screen to enable or disable the LTE2566-M634's firewall

13.1.2 What You Need To Know

The following terms and concepts may help as you read through this chapter.
About the LTE2566-M634 Firewall
The LTE2566-M634's firewall feature physically separates the LAN and the WAN and acts as a secure
gateway for all data passing between the networks.
C
LTE2566-M634 User's Guide
88
H A P T E R

Firewall

(Section 13.2 on page
13
89).