Netgear RT338 참조 가이드
Reference Guide for the Model RT338 ISDN Router
Configuring Filters
9-7
Generic Filter Rule
This section provides information about configuring the protocol-independent parameters for
a generic filter rule for your router.
a generic filter rule for your router.
lists the fields in Generic Filter Rule menu.
When you complete Menu 21.1.1 - Generic Filter Rule, press [Enter] at the Press ENTER to
Confirm... prompt to confirm your selections. Press [Esc] at any time to cancel your selections.
The data entered is displayed on Menu 21.1 - Filter Rules Summary.
Confirm... prompt to confirm your selections. Press [Esc] at any time to cancel your selections.
The data entered is displayed on Menu 21.1 - Filter Rules Summary.
Log
Choose whether or not to log the results of packets attempting to pass the filter rule.
These results are displayed on the System Log (see
These results are displayed on the System Log (see
” on
Seven options are available for this field:
• None—No packets are logged (default).
• Action Matched—Only packets that match the rule parameters are logged.
• Action Not Matched—Only packets that do not match the rule parameters are logged.
• None—No packets are logged (default).
• Action Matched—Only packets that match the rule parameters are logged.
• Action Not Matched—Only packets that do not match the rule parameters are logged.
Both—All packets are logged.
• Check Next Rule (default)
• Forward
• Drop
• Forward
• Drop
Action Matched
Action Not
Matched
Action Not
Matched
Choose what to do with the packet if the conditions for the filter rule are not met.
There are three options for this field:
• Check Next Rule (default)
• Forward
• Drop
There are three options for this field:
• Check Next Rule (default)
• Forward
• Drop
Table 9-5.
Generic Filter Rule Fields
Field
Description
Active
In this field, you can make the filter rule active (Yes) or inactive (No).
Offset
Offset refers to the value of the byte that you want to use as your starting offset. That is,
in the data packet, at what point do you want to begin the comparison. The range for
this field is from 0 to 255. Default = 0.
in the data packet, at what point do you want to begin the comparison. The range for
this field is from 0 to 255. Default = 0.
Length
This field refers to the length (in bytes) of the data in the packet that the router should
use for comparison and masking. The starting point of this data is determined by Offset.
The range for this field is 0 to 8. Default = 0.
use for comparison and masking. The starting point of this data is determined by Offset.
The range for this field is 0 to 8. Default = 0.
Mask
In this field, specify (in hexadecimal) the value that the router should logically qualify
and the data in the packet. Because length is given in bytes, enter a hexadecimal
number that is twice the specified length for numbers in this field. For example, if length
is 4, a valid Mask must have 8 hexadecimal numbers (1155ABF8).
and the data in the packet. Because length is given in bytes, enter a hexadecimal
number that is twice the specified length for numbers in this field. For example, if length
is 4, a valid Mask must have 8 hexadecimal numbers (1155ABF8).
Table 9-4.
TCP/IP Filter Rule Fields (continued)
Field
Description