Zyxel-communications Internet Security Gateway ZyWALL 100 Manuel d'utilisateur télécharger pdf (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:

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Zyxel-communications Internet Security Gateway ZyWALL 100 Manuel d'utilisateur Page 212