ZyXEL Communications Internet Security Gateway ZyWALL 100 - Manual (Page 212)

ZyWALL 100 Internet Security Gateway
Filter Configuration 19-17
19.6 Applying a Filter and Factory Defaults
This section shows you where to apply the filter(s) after you design it (them). The ZyWALL already has
filters to prevent NetBIOS traffic from triggering calls, and block incoming telnet, FTP and HTTP
connections.
If you do not activate the firewall, it is advisable to apply filters.
19.6.1 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 19-13 Filtering LAN Traffic
19.6.2 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
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: