ZyWALL 10/50 Internet Security Gateway

Table 18-4 Generic Filter Rule Menu Fields

FIELD

DESCRIPTION

OPTIONS

 

 

 

Filter #

This is the filter set, filter rule co-ordinates, i.e., 2,3 refers to the second

 

 

filter set and the third rule of that set.

 

 

 

 

Filter Type

Use [SPACE BAR] to select a rule type. Parameters displayed below

Generic Filter

 

each type will be different. TCP/IP filter rules are used to filter IP

Rule

 

packets while generic filter rules allow filtering of non-IP packets.

TCP/IP Filter

 

 

Rule

Active

Select Yes to turn on the filter rule or No to turn it off.

Yes

 

 

 

Offset

Enter the starting byte of the data portion in the packet that you wish to

0

 

compare. The range for this field is from 0 to 255.

(Default)

 

 

 

Length

Enter the byte count of the data portion in the packet that you wish to

0

 

compare. The range for this field is 0 to 8.

(Default)

 

 

 

Mask

Enter the mask (in Hexadecimal notation) to apply to the data portion

 

 

before comparison.

 

 

 

 

Value

Enter the value (in Hexadecimal notation) to compare with the data

 

 

portion.

 

More

If Yes, a matching packet is passed to the next filter rule before an

Yes

 

action is taken; else the packet is disposed of according to the action

No

 

fields.

 

 

If More is Yes, then Action Matched and Action Not Matched will be

 

 

No.

 

Log

Select the logging option from the following:

 

 

None - No packets will be logged.

None

 

Action Matched - Only packets that match the rule parameters will be

Action Matched

 

logged.

Action Not

 

 

 

Action Not Matched - Only packets that do not match the rule

Matched

 

parameters will be logged.

Both

 

Both – All packets will be logged.

 

 

 

 

 

Action

Select the action for a packet matching the rule.

Check Next Rule

Matched

 

Forward

 

 

Drop

Action Not

Select the action for a packet not matching the rule.

Check Next Rule

Matched

 

Forward Drop

 

 

 

Filter Configuration

18-13