Zyxel-communications P-334 Bedienungsanleitung PDF herunterladen (Seite 269)

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Prestige 334 User’s Guide

Chapter 27 Filter Configuration 268

Figure 144 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 Prestige

already has filters to prevent NetBIOS traffic from triggering calls, and block incoming telnet,

FTP and HTTP connections

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 Prestige and output filter sets filter outgoing traffic from the Prestige. For PPPoE

or PPTP encapsulation, you have the additional option of specifying remote node call filter

sets.

Note: If you do not activate the firewall, it is advisable to apply filters

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