ZyXEL ADSL Prestige 2602R-61 VoIP 91-006-024004B Manual Do Utilizador

Prestige 2602R Series User’s Guide

Chapter 13 Firewall Configuration

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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 58   Firewall: Default Policy

The following table describes the labels in this screen. 

Table 42   Firewall: Default Policy 

Enable Firewall

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. 

Note: Allowing asymmetrical routes may let traffic from the WAN go 

directly to a LAN computer without passing through the 
Prestige. See 

 for more on triangle 

route topology and how to deal with this problem.

Packet Direction

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

to WAN/Router or 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. 

Default Action

Use the radio buttons to select whether to Block (silently discard) or Forward 

(allow the passage of) packets that are traveling in the selected direction.

Log

Select the check box to create a log (when the above action is taken) for packets 

that are traveling in the selected direction and do not match any of the rules below.

Back

Click Back to return to the previous screen.