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EMG5324-D10A User’s Guide 177
CHAPTER 13
Firewall
13.1 Overview
Use the Device firewall screens to enable and configure the firewall that protects your 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 85 Default Firewall Action
13.1.1 What You Can Do in this Chapter
•Use the General screen to enable or disable the Device’s firewall (Section 13.2 on page 178).
•Use the Services screen to view the configured firewall rules and add, edit or remove a firewall
rule (Section 13.3 on page 179).
•Use the Access Control screen to view and configure incoming/outgoing filtering rules (Section
13.4 on page 181).
•Use the DoS screen to activate protection against Denial of Service (DoS) attacks (Section 13.5
on page 183).
WAN
LAN
3
4
1
2
A