ZyXEL Communications MAX-306M1, User Manual

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Chapter 16 The Firewall Screens
User’s Guide
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the Internet. The WiMAX Modem can be used to prevent theft, destruction and
modification of data, as well as log events, which may be important to the security
of your network.
The WiMAX Modem is installed between the LAN and a WiMAX base station
connecting to the Internet. This allows it to act as a secure gateway for all data
passing between the Internet and the LAN.
The WiMAX Modem has one Ethernet (LAN) port. The LAN (Local Area Network)
port attaches to a network of computers, which needs security from the outside
world. These computers will have access to Internet services such as e-mail, FTP
and the World Wide Web. However, “inbound access” is not allowed (by default)
unless the remote host is authorized to use a specific service.
16.2 Firewall Setting
This section describes firewalls and the built-in WiMAX Modem’s firewall features.
16.2.1 Firewall Rule Directions
Figure 79 Firewall Rule Directions
LAN-to-WAN rules are local network to Internet firewall rules. The default is to
forward all traffic from your local network to the Internet.
You can block certain LAN-to-WAN traffic in the Services screen (click the
Services tab). All services displayed in the Blocked Services list box are LAN-
to-WAN firewall rules that block those services originating from the LAN.
Blocked LAN-to-WAN packets are considered alerts. Alerts are “higher priority
logs” that include system errors, attacks and attempted access to blocked web
sites. Alerts appear in red in the View Log screen. You may choose to have alerts
e-mailed immediately in the Log Settings screen.