ZyXEL Communications 480 manual Applying Filters and Factory Defaults, Ethernet traffic

Prestige 480 Dual BRI ISDN Router

9.4Applying Filters and Factory Defaults

This section shows you where to apply the filter(s) after you design it (them). Two sets of factory default filter rules have been configured in Menu 21 to prevent NetBIOS traffic from triggering calls (see Figure 8-7 Menu 21 - Filter Set Configuration).

9.4.1 Ethernet traffic

You seldom need to filter Ethernet traffic; however, the filter sets may be useful to block certain packets, reducing traffic and preventing security breaches. Go to Menu 3.1 (shown below) 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,. The factory default filter set, NetBIOS_LAN, is inserted in the protocol filters field under Input Filter Sets in Menu 3.1 in order to prevent local NetBIOS messages from triggering calls to the DNS server.

Menu 3.1 - General Ethernet Setup

Input Filter Sets: protocol filters= 2

device filters= Output Filter Sets: protocol filters= device filters=

Factory

Default

Filter

Press ENTER to Confirm or ESC to Cancel:

Figure 9-10 Filtering Ethernet traffic

9.4.2 Remote Node Filters

Go to Menu 11.5 (shown below) and enter the number(s) of the filter set(s) as appropriate. You can cascade up to four filter sets by entering their numbers separated by commas. The factory default filter set, NetBIOS_WAN, is inserted in protocol filters field under Call Filter Sets in Menu 11.5 to block local NetBIOS traffic from triggering calls to the ISP.

9-16 Filter Configuration