Figure 16-17 Filtering Ethernet Traffic; Table 16-5 Filter Sets Table - ZyXEL Communications Prestige 652 User Manual

Prestige 652 ADSL Security Router
FILTER SETS
Input Filter Sets:
Output Filter Sets:
Call Filter Sets:
16.6.1 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.
16.6.2 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.
For PPPoE encapsulation, you have the option of specifying remote node call filter sets. Insert the factory
default filter set, NetBIOS_WAN, in the protocol filters field under Call Filter Sets in menu 11.5 to block
local NetBIOS traffic from triggering calls to the ISP.
16-18

Table 16-5 Filter Sets Table

Apply filters for incoming traffic. You may apply protocol or device
filter rules. See earlier in this chapter for information on filters.
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.
Apply filters to decide if a packet should be allowed to trigger a call.
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:

Figure 16-17 Filtering Ethernet Traffic

DESCRIPTION
Apply filter 2 to
block NETBIOS
traffic from the
LAN
Filter Configuration