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30-4 Filter Configuration
You can apply up to four filter sets to a particular port to block various types of
packets. Because each filter set can have up to six rules, you can have a
maximum of 24 rules active for a single port.
For incoming packets, your Contivity 251 applies data filters only. Packets are
processed depending on whether a match is found. The following sections
describe how to configure filter sets.
The Filter Structure of the Contivity 251
A filter set consists of one or more filter rules. Usually, you would group related
rules, for example, all the rules for NetBIOS, into a single set and give it a
descriptive name. You can configure up to twelve filter sets with six rules in each
set, for a total of 72 filter rules in the system.
30.2 Configuring a Filter Set for the Contivity 251
To configure a filter set, follow the steps shown next.
Step 1.
Step 2.
317516-A Rev 00
Enter 21 in the main menu to display Menu 21 – Filter and Firewall
Setup.
Enter 1 to display Menu 21.1 – Filter Set Configuration as shown
next.
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