Firewall Rule Summary; Figure 117 Security > Firewall > Rule Summary - ZyXEL Communications ZyWall 5 Series User Manual

ZyWALL 5/35/70 Series User's Guide
Table 67 SECURITY > FIREWALL > Default Rule (Bridge Mode)
LABEL
Log Broadcast
Frame
Apply
Reset

11.9 Firewall Rule Summary

Click SECURITY > FIREWALL > Rule Summary to open the screen. This screen displays
a list of the configured firewall rules.
Note: The ordering of your rules is very important as rules are applied in the order
that they are listed.
Figure 117 SECURITY > FIREWALL > Rule Summary
234
DESCRIPTION
Select this to create a log for any broadcast frames traveling in the selected
direction. Many of these logs in a short time period could indicate a broadcast storm.
A broadcast storm occurs when a packet triggers multiple responses from all hosts
on a network or when computers attempt to respond to a host that never replies. As
a result, duplicated packets are continuously created and circulated in the network,
thus reducing network performance or even rendering it inoperable. A broadcast
storm can be caused by an attack on the network, an incorrect network topology
(such as a bridge loop) or a malfunctioning network device.
Click Apply to save your changes back to the ZyWALL.
Click Reset to begin configuring this screen afresh.
Chapter 11 Firewall