Configuring Firewall; Rule Summary; Figure 37 Firewall: Default Rule; Table 30 Firewall: Default Rule - ZyXEL Communications ZyWall P1 User Manual

7.6 Configuring Firewall

Click FIREWALL to open the Default Rule screen. Enable (or activate) the firewall by
selecting the Enable Firewall check box as seen in the following screen.

Figure 37 Firewall: Default Rule

The following table describes the labels in this screen.

Table 30 Firewall: Default Rule

LABEL
Enable Firewall
Allow
Asymmetrical
Route
Packet Direction This is the direction of travel of packets (LAN to LAN/ZyWALL, LAN to WAN, WAN
Default Action
Log
Apply
Cancel

7.6.1 Rule Summary

Note: The ordering of your rules is very important as rules are applied in turn.
Chapter 7 Firewall Screens
DESCRIPTION
Select this check box to activate the firewall. The ZyWALL performs access control
and protects against Denial of Service (DoS) attacks when the firewall is activated.
Select this check box to have the ZyWALL firewall permit the use of triangle route
topology on the network. See
topology.
to LAN, WAN to WAN/ZyWALL).
Firewall rules are grouped based on the direction of travel of packets to which they
apply. For example, LAN to LAN/ZyWALL means packets traveling from a
computer/subnet on the LAN to either another computer/subnet on the LAN interface
of the ZyWALL or the ZyWALL itself.
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.
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.
Click Apply to save your changes back to the ZyWALL.
Click Cancel to begin configuring this screen afresh.
ZyWALL P1 User's Guide
Appendix E on page 295 for more on triangle route
107