ZyXEL 202H 91-003-194003B Manual Do Utilizador

P-202H Plus v2 User’s Guide

Chapter 25 Filter Configuration

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The protocol dependent filter rules abbreviation are listed as follows:

Refer to the next section for information on configuring the filter rules.

To configure a filter rule, type its number in Menu 21.1.x - Filter Rules Summary and press 
[ENTER] to open menu 21.1.x.x for the rule.

There are two types of filter rules: TCP/IP and Generic. Depending on the type of rule, the 
parameters for each type will be different. Use [SPACE BAR] to select the type of rule that 
you want to create in the Filter Type field and press [ENTER] to open the respective menu.

To speed up filtering, all rules in a filter set must be of the same class, i.e., protocol filters or 
generic filters. The class of a filter set is determined by the first rule that you create. When 
applying the filter sets to a port, separate menu fields are provided for protocol and device 
filter sets. If you include a protocol filter set in a device filter field or vice versa, the ZyXEL 
Device will warn you and will not allow you to save.

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, for example, UDP and TCP 
headers.

To configure TCP/IP rules, select TCP/IP Filter Rule from the Filter Type field and press 
[ENTER] to open Menu 21.1.x.x - TCP/IP Filter Rule, as shown next

Table 79   Rule Abbreviations Used

IP

               Pr

Protocol

               SA

Source Address

               SP

Source Port number

               DA

Destination Address

               DP

Destination Port number

GEN

              Off

Offset

              Len

Length