ZyXEL Communications Corporation NBG4104 Manual De Usuario

 Chapter 18 Firewall

NBG4104 User’s Guide

Think about access control before you connect to the network in any way, including attaching a 
modem to the port. 

Limit who can access your router. 

Don't enable any local service (such as 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. 

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. 

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

Keep the firewall in a secured (locked) room. 

Use this screen to enable or disable the NBG4104’s firewall, and set up firewall logs. Click 
Configuration > Security > Firewall to open the General screen.

Configuration > Security > Firewall > General l

The following table describes the labels in this screen.

Configuration > Security > Firewall > General 

Enable Firewall

Select this check box to activate the firewall. The NBG4104 performs access control and 
protects against Denial of Service (DoS) attacks when the firewall is activated.

Enable Anti-DoS 
Attack

Select this check box to activate the Anti-Dos Attack function.

Apply

Click Apply to save the settings. 

Reset

Click Reset to start configuring this screen again.