ZyXEL Communications P-334 ユーザーズマニュアル

Prestige 334 User’s Guide

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Chapter 11 Firewall

The Prestige has one Ethernet WAN port and four Ethernet LAN ports, which are used to 
physically separate the network into two areas.The WAN (Wide Area Network) port attaches 
to the broadband (cable or DSL) modem to the Internet.

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.

1 Change the default password via web configurator. 

2 Think about access control before you connect to the network in any way, including 

attaching a modem to the port. 

3 Limit who can access your router. 

4 Don't enable any local service (such as SNMP or NTP) that you don't use. Any enabled 

service could present a potential security risk. A determined hacker might be able to find 
creative ways to misuse the enabled services to access the firewall or the network. 

5 For local services that are enabled, protect against misuse. Protect by configuring the 

services to communicate only with specific peers, and protect by configuring rules to 
block packets for the services at specific interfaces. 

6 Protect against IP spoofing by making sure the firewall is active. 

7 Keep the firewall in a secured (locked) room. 

From the MAIN MENU, click FIREWALL to open the Settings screen.