Force10 Networks 100-00055-01 manual Creating Rules Files, Rules Capacity, Compiling Rules

Chapter 8 Compiling Rules

The P-Series Network Interface Card Compiler (pnic-Compiler) produces user-defined firmware for the appliances. The user-defined input is a set of signature-based rules in Snort syntax, and compilation directives. The output of the compiler is a Xilinx bit file and ASCII mapping files that map specified signatures to internal configuration registers. The configuration registers are used to disable/enable rules or block packets.

Creating Rules Files

Store rules files in a pnic-compilersub-directory — for example pnic-compiler/rules. Force10 recommends not storing rules files elsewhere because this increases the length of the firmware file name.

Rules Capacity

The maximum rules capacity for the P10 is approximatly 14000 static rules or 200 dynamic rules. The space required for a static rule depends upon its complexity.

Compiling Rules

Note: The pnic-Compiler is managed with GNU make.

To complile rules:

Step Task

1Change directory to pnic-compiler.

2Enter the command gmake. This command invokes the configuration script, the pnic-Compiler, and the Xilinx compiler, in succession. Entering time gmake invokes the same processes, but this command measures the compilation time as well.

3The script prompts you for a number of compilation options. Refer to Table 8 for a description of each option, and enter a response for each.

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