Applying A Filter And Factory Defaults; Figure 8-16 Protocol And Device Filter Sets; Table 8-8 Input, Output And Call Filter Sets - ZyXEL Communications Prestige 643 User Manual

Prestige 643 ADSL Router
address and port number are replaced on a connection-by-connection basis, which makes it impossible to
know the exact address and port on the wire. Therefore, the Prestige applies the protocol filters to the
"native" IP address and port number before NAT/SUA for outgoing packets and after 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.
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 filter telnet, FTP, NetBIOS and
PPPoE traffic. The PPPoE filter filters out all packets except PPPoE packets going out from the Prestige to
the ISP or remote node.
FILTER SETS
Input Filter Sets:
Output Filter
Sets:
Call Filter Sets:
8-20

Figure 8-16 Protocol and Device Filter Sets

Table 8-8 Input, Output and Call Filter Sets

Apply filters for traffic coming into the Prestige. You may apply filter
rules for protocol or device filters. See the next section for
information on types of filters.
Apply filters for traffic going out of 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 determine if a packet should be allowed to trigger a
call.
DESCRIPTION
Filter Configuration