13
Firewall
13.1 Overview
Use these screens to enable and configure the firewall that protects your
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 75 Default Firewall Action
13.2What You Can Do
•Use the General screen (Section 13.4 on page 126) to enable or disable the
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