ZyXEL Communications ZyXEL ZyAIR 100 - Manual (Page 421)

ZyWALL 10~100 Series Internet Security Gateway
Filter Configuration 31-17
If you do not activate the firewall, it is advisable to apply filters.
31.6.1 Applying LAN Filters
LAN traffic filter sets may be useful to block certain packets, reduce traffic and prevent security breaches.
Go to menu 3.1 (shown next) and enter the number(s) of the filter set(s) that you want to apply as
appropriate. You can choose up to four filter sets (from twelve) by entering their numbers separated by
commas, e.g., 3, 4, 6, 11. Input filter sets filter incoming traffic to the ZyWALL and output filter sets filter
outgoing traffic from the ZyWALL. For PPPoE or PPTP encapsulation, you have the additional option of
specifying remote node call filter sets.
Figure 31-13 Filtering LAN Traffic
31.6.2 Applying DMZ Filters
DMZ traffic filter sets may be useful to block certain packets, reduce traffic and prevent security breaches.
Go to menu 5.1 (shown next) and enter the number(s) of the filter set(s) that you want to apply as
appropriate. You can choose up to four filter sets (from twelve) by entering their numbers separated by
commas, e.g., 3, 4, 6, 11. Input filter sets filter incoming traffic to the ZyWALL and output filter sets filter
outgoing traffic from the ZyWALL. The ZyWALL already has filters to prevent NetBIOS traffic from
triggering calls, and block incoming telnet, FTP and HTTP connections. The DMZ port is not available on
all models.
Menu 3.1 – LAN Port Filter Setup
Input Filter Sets:
protocol filters=
device filters=
Output Filter Sets:
protocol filters=
device filters=
Press ENTER to Confirm or ESC to Cancel: