Compatible Systems 5.4 manual Basic IPX SAP Filter Rules and Syntax, IPX SAP Filter Options

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.