ZyXEL Communications Prestige 2602R Series, User Manual

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Prestige 2602R Series User’s Guide
Chapter 13 Firewall Configuration 153
13.5 Configuring Basic Firewall Settings
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
LABEL DESCRIPTION
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
Appendix E on page 389 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.