ZyXEL Communications Prestige 642M series Guía de usuario descargar pdf (Pagina 25)

Prestige 642 ADSL Internet Access Router

8-20 Filter Configuration

NAT/SUA for incoming packets. On the other hand, the generic, or

device filters

are applied to the raw

packets that appear on the wire. They are applied at the point when the Prestige is receiving and sending the

packets; i.e. the interface. The interface can be an Ethernet, or any other hardware port. The following

diagram illustrates this.

Figure 8-15 Protocol and Device Filter Sets

8.5 Applying a Filter and Factory Defaults

This section shows you where to apply the filter(s) after you design it (them). Sets of factory default filter

rules have been configured in Menu 21 (but have not been applied) to prevent NetBIOS traffic from

triggering calls, incoming telnet and sessions. The PPPoE filter filters out all packets

except

PPPoE packets

going out from the Prestige to the ISP or remote node.

8.5.1 LAN traffic

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. The factory default set, NetBIOS_LAN, can be inserted in

protocol

filters –

field under

Input Filter Sets

Menu 3.1

to block NetBIOS traffic to the Prestige from the LAN.

Figure 8-16 Filtering LAN Traffic

Menu 3.1 – LAN Port Filter Setup

Input Filter Sets:

protocol filters= 2

device filters=

Output Filter Sets:

Protocol filters=

device filters=

Press ENTER to Confirm or ESC to Cancel:

Apply

Default Filter

2 here.

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ZyXEL Communications Prestige 642M series Guía de usuario Pagina 25