ZyXEL ADSL Prestige 660HW-61 91-004-361001 Manual Do Utilizador

Prestige 660H/HW Series User’s Guide

Chapter 13 Firewall Configuration

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Alerts are reports on events, such as attacks, that you may want to know about right away. You 
can choose to generate an alert when an attack is detected in the Edit Rule screen (select the 
Send Alert Message to Administrator When Matched checkbox) or when a rule is matched 
in the Edit Rule screen (see 

 

When an event generates an alert, a 

message can be immediately sent to an e-mail account that you specify in the Log Settings 
screen (see the chapter on logs).

Click Firewall and then Default Policy to display the following screen. Activate the firewall 
by selecting the Firewall Enabled check box as seen in the following screen.

Figure 60   Firewall: Default Policy

The following table describes the labels in this screen. 

Table 41   Firewall: Default Policy 

Firewall Enabled

Select this check box to activate the firewall. The Prestige performs access control 

and protects against Denial of Service (DoS) attacks when the firewall is activated.

Allow 

Asymmetrical 

Route

Select this check box to have the Prestige firewall permit the use of triangle route 

topology on the network. See the appendix for more on triangle route topology.

Packet Direction

This is the direction of travel of packets (LAN to LAN/Router, LAN to WAN, WAN 

to WAN/Router, WAN to LAN).
Firewall rules are grouped based on the direction of travel of packets to which they 

apply. For example, LAN to LAN/Router means packets traveling from a 

computer/subnet on the LAN to either another computer/subnet on the LAN 

interface of the Prestige or the Prestige itself.