ZyXEL Communications HS100/HS100W manual Firewall Versus Filters, Applying a Filter

HomeSafe User’s Guide

Figure 27-12 Protocol and Device Filter Sets

27.5 Firewall Versus Filters

Firewall configuration is discussed in the firewall chapters of this manual. Further comparisons are also made between filtering, NAT and the firewall.

27.6 Applying a Filter

This section shows you where to apply the filter(s) after you design it (them). The HomeSafe 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.

27.6.1Applying 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 HomeSafe and output filter sets filter outgoing traffic from the HomeSafe. For PPPoE or PPTP encapsulation, you have the additional option of specifying remote node call filter sets.

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:

Figure 27-13 Filtering LAN Traffic

27.6.2 Applying Remote Node Filters

Go to menu 11.5 (shown below – note that call filter sets are only present for PPPoE encapsulation) and enter the number(s) of the filter set(s) as appropriate. You can cascade up to

27-12 Filter Configuration