Firewall Versus Filters; Applying A Filter; Figure 27-12 Protocol And Device Filter Sets; Figure 27-13 Filtering Lan Traffic - ZyXEL Communications Parental Control Gateway HS100/HS100W User Manual

HomeSafe User's Guide

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.
27.6.1 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
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.
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

Figure 27-12 Protocol and Device 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

Filter Configuration