User's Guide

Table Of Contents
EMG1302-R10A User’s Guide 125
CHAPTER 16
Security
16.1 Overview
Use these screens to enable and configure the firewall that protects your EMG1302-R10A 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 71 Default Firewall Action
16.2 What You Can Do
•Use the General screen to enable or disable the EMG1302-R10A’s firewall (Section 16.4 on page
127).
•Use the Services screen to configure the EMG1302-R10A’s ICMP settings (Section 16.5 on page
128).
WAN
LAN
3
4
1
2
A