ZyXEL Communications Prestige 652H series, User Manual

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Prestige 652H/HW Series User’s Guide
34-18 Filter Configuration
Table 34-5 Filter Sets Table
FILTER SETS DESCRIPTION
Input Filter Sets: Apply filters for incoming traffic. You may apply protocol or device filter rules. See
earlier in this chapter for information on filters.
Output Filter Sets: Apply filters for traffic leaving the Prestige. You may apply filter rules for protocol or
device filters. See earlier in this section for information on types of filters.
Call Filter Sets: Apply filters to decide if a packet should be allowed to trigger a call.
34.7.1 Ethernet Traffic
You seldom need to filter Ethernet traffic; however, the filter sets may be useful to block certain packets,
reduce traffic and prevent security breaches. Go to menu 3.1 (shown next) and type 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
typing their numbers separated by commas, for example, 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.
Figure 34-14 Filtering Ethernet Traffic
34.7.2 Remote Node Filters
Go to menu 11.5 (shown next) and type the number(s) of the filter set(s) as appropriate. You can cascade up
to four filter sets by typing their numbers separated by commas. The factory default filter set,
NetBIOS_WAN, is inserted in the
protocol filters field under Call Filter Sets in menu 11.5 to block local
NetBIOS traffic from triggering calls to the ISP.
Menu 3.1 – LAN Port Filter Setup
Input Filter Sets:
protocol filters=
device filters=
Output Filter Sets:
protocol filters=
device filters=
3
Press ENTER to Confirm or ESC to Cancel:
Apply filter 3 to
block NETBIOS
traffic from the
LAN.