Tcp/Ip Filter Rule; Figure 8-3 Protocol And Device Filter Sets - ZyXEL Communications Prestige 641 User Manual

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.
Interface

8.4.1 TCP/IP Filter Rule

This section shows you how to configure a TCP/IP filter rule. TCP/IP rules allow you to base the rule on
the fields in the IP and the upper layer protocol, e.g., UDP and TCP, headers.
To configure a TCP/IP rules, select TCP/IP Filter Rule from the Filter Type field and press Enter to open
Menu 21.1.1 - TCP/IP Filter Rule, as shown next.
Filter Configuration
Prestige 641 ADSL Internet Access Router
Incoming
Device
Filters
Outgoing
Device
Filters

Figure 8-3 Protocol and Device Filter Sets

S
Incoming
U
Protocol
Filters
A
S
Outgoing
U
Protocol
A
Filters
Route
8-5