Reference Guide for the Model RT328 and Model RH348 ISDN Routers
Generic Filter Rule
This section provides information about configuring the
a generic filter rule for your router. Table
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.
Table | Generic Filter Rule Menu Fields | ||
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Field |
| Description |
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Active |
| In this field, you can make the filter rule active (Yes) or inactive (No). |
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Offset |
| Offset refers to the value of the byte that you want to use as your starting offset. That is, |
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| in the data packet, at what point do you want to begin the comparison. The range for |
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| this field is from 0 to 255. Default = 0. |
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Length |
| This field refers to the length (in bytes) of the data in the packet that the router should |
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| use for comparison and masking. The starting point of this data is determined by Offset. |
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| The range for this field is 0 to 8. Default = 0. |
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Mask |
| In this field, specify (in hexadecimal) the value that the router should logically qualify |
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| and the data in the packet. Because length is given in bytes, enter a hexadecimal |
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| number that is twice the specified length for numbers in this field. For example, if length |
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| is 4, a valid Mask must have 8 hexadecimal numbers (1155ABF8). |
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Value |
| In this field, specify (in hexadecimal) the value that the router should use to compare |
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| with the masked packet. The value should align with Offset. Because length is given in |
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| bytes, you need to enter twice the length in hexadecimal numbers for this field. For |
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| example, if length is 4, a valid Value must have 8 hexadecimal numbers (1155ABF8). |
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| If the result from the masked packet matches Value, then the packet is considered |
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| matched. |
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More |
| In this field, you can determine whether to pass the packet through the next filter rule |
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| before an action is taken. There are two options for this field: |
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| • Yes |
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| • No (Default) |
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| If Yes is selected for this field, Action Matched and Action Not Matched will be N/A. |
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Filter Configuration |