Compatible-systems 5.4 Manuel d'utilisateur télécharger pdf (Page 212)

206 Chapter 12 - IPX Filtering

Rules that have been specified using CompatiView may be edited or exam-

ined through the command line interface, and vice-versa. When the rules are

downloaded into the device from CompatiView, they will be encrypted.

Rule sets that have been created with the IPX SAP Filter Editor Window

must be applied using the pull-down menus in the Main IPX Filtering

Dialog Box.

Basic IPX SAP Filter Rules and Syntax

At a minimum, every non-comment line in a filter set must include an action.

However, an action alone will not create a useful filter rule (except for setting

a default rule as noted above).

Every line in a SAP filter set must begin with the actions permit or deny, or

the comment indicator #.

• Lines which begin with permit specify that server information meeting

the conditions should be inserted into the device’s SAP table.

• Lines which begin with deny specify that server information meeting the

conditions should not be included in the device’s SAP table.

• Lines which begin with # specify that the text on the line is a comment

and should be ignored.

IPX SAP Filter Options

The basic action specified in the rule will almost always be accompanied with

an option. IPX SAP options use some or all of a set of operators to determine

whether the filter rule matches information in a SAP packet or not. These

operators are discussed below:

• eq, ==, or = These are allowable ways of writing an “equality” operator

which will match if the value in the server information is equal to the

value specified in the option expression.

• lt or < These are allowable ways of writing a “less than” operator which

will match server information if its value is less than the value specified

in the option expression.

• lteq, le, <=, or =< These are allowable ways of writing a “less than or

equal to” operator which will match server information if its value is less

than or equal to the value specified in the option expression.

• gt or > These are allowable ways of writing a “greater than” operator

which will match server information if its value is greater than the value

specified in the option expression.

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Compatible-systems 5.4 Manuel d'utilisateur Page 212