Packet Direction Matrix; Figure 80 Security > Firewall > Default Rule (Router Mode) - ZyXEL Communications ZYWALL P1 User Manual

Chapter 9 Firewall

9.2 Packet Direction Matrix

The ZyWALL's packet direction matrix allows you to apply certain security settings (like
firewall, IDP and anti-virus) to traffic flowing in specific directions.
For example, click SECURITY > FIREWALL to open the following screen. This screen
configures general firewall settings.
Figure 80 SECURITY > FIREWALL > Default Rule (Router Mode)
Packets have a source and a destination. The packet direction matrix in the lower part of the
screen sets what the ZyWALL does with packets traveling in a specific direction that do not
match any of the firewall rules.
A specific interface or any of the ZyWALL's VPN
connections
By default, the ZyWALL silently blocks traffic from the WAN from going to the LAN
interfaces. The field where the From WAN row and the To LAN column intersect is set to
Drop as shown.
142
From
A specific interface or any of the ZyWALL's VPN
connections
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