Chapter 40 Filter Configuration

Table 230 Abbreviations Used in the Filter Rules Summary Menu

FIELD

DESCRIPTION

A

Active: “Y” means the rule is active. “N” means the rule is inactive.

 

 

Type

The type of filter rule: “GEN” for Generic, “IP” for TCP/IP.

 

 

Filter Rules

These parameters are displayed here.

 

 

M

More.

 

“Y” means there are more rules to check which form a rule chain with the present rule.

 

An action cannot be taken until the rule chain is complete.

 

“N” means there are no more rules to check. You can specify an action to be taken i.e.,

 

forward the packet, drop the packet or check the next rule. For the latter, the next rule is

 

independent of the rule just checked.

 

 

m

Action Matched.

 

“F” means to forward the packet immediately and skip checking the remaining rules.

 

“D” means to drop the packet.

 

“N“ means to check the next rule.

 

 

n

Action Not Matched.

 

“F” means to forward the packet immediately and skip checking the remaining rules.

 

“D” means to drop the packet.

 

“N” means to check the next rule.

 

 

The protocol dependent filter rules abbreviation are listed as follows:

Table 231 Rule Abbreviations Used

ABBREVIATION

DESCRIPTION

IP

 

Pr

Protocol

SA

Source Address

SP

Source Port number

DA

Destination Address

DP

Destination Port number

 

 

GEN

 

Off

Offset

Len

Length

 

 

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

40.2.1 Configuring a Filter Rule

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.

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 ZyWALL will warn you and will not allow you to save.

 

621

ZyWALL 2WG User’s Guide