ZyXEL Communications G-2000 Plus User Manual

ZyAIR G-2000 Plus User’s Guide

197 

Chapter 15 Firewall Screens

Figure 81   Default Rule 

The following table describes the labels in this screen.

Table 60   Default Rule

Enable Firewall

Select this check box to activate the firewall. The ZyAIR 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 ZyAIR 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 ((W)LAN to (W)LAN/ZyAIR, (W)LAN to 

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

apply. For example, (W)LAN to (W)LAN/ZyAIR means packets traveling from a 

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

of the ZyAIR or the ZyAIR itself. 

Default Action

Use the drop-down list boxes 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.

Apply

Click Apply to save your changes back to the ZyAIR.

Reset

Click Reset to begin configuring this screen afresh.

Note: The ordering of your rules is very important as rules are 
applied in turn.

Click FIREWALL, then the Rule Summary tab to open the screen.