9.6 General Firewall Policy
Click Security > Firewall to display the following screen. Activate the firewall by selecting the Active Firewall check box as seen in the following screen.
Refer to Section 8.1 on page 145 for more information.
Figure 86 Firewall: General
The following table describes the labels in this screen.
Table 60 Firewall: General
LABEL | DESCRIPTION |
|
|
Active Firewall | Select this check box to activate the firewall. The ZyXEL Device performs access |
| control and protects against Denial of Service (DoS) attacks when the firewall is |
| activated. |
Bypass Triangle | Select this check box to have the ZyXEL Device firewall permit the use of triangle |
Route | route topology on the network. See the appendix for more on triangle route |
| topology. |
Note: Allowing asymmetrical routes may let traffic from the WAN go directly to a LAN computer without passing through the router. See Appendix M on page 366 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, and 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 ZyXEL Device or the ZyXEL Device itself.
162 | Chapter 9 Firewall Configuration |