ZyXEL Communications LTE3202-M430, User Manual, Page: 64 / 117

LTE3202-M430 User’s Guide
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C
HAPTER
9
Firewall
9.1 Overview
Use these screens to enable and configure the firewall that protects your LTE3202-M430 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 42 Default Firewall Action
9.1.1 What You Can Do
• Use the DoS Protection screen to enable Denial of Service (DoS) protection in the LTE3202-M430
( Section 9.2 on page 66 ).
• Use the ICMP Protection screen to enable ICMP protection in the LTE3202-M430( Section 9.3 on page
67 ).
• Use the ARP Protection screen to enable ARP protection in the LTE3202-M430 ( Section 9.4 on page 67 ).
• Use the URL Filter screen to view and configure content filtering rules ( Section 9.5 on page 68 ).
• Use the IPv4 Port Filter screen to view and configure IPv4/Port filtering rules ( Section 9.6 on page 69 ).
• Use the IPv6 Port Filter screen to view and configure IPv6/Port filtering rules ( Section 9.7 on page 71 ).