Explore Snort::Rule FOR LINUX

Description:

Snort::Rule is a Perl extension that allows you to dynamically create snort rules.

If you are passionate about network security, this tool is a must-have in your arsenal.

Technical Specifications:

• Price: FREE


• Publisher: Wes Young


• Created At: 2024-06-20


• Updated At: 2025-04-24

How to Use Snort::Rule:

To start using Snort::Rule, follow these simple steps:

use Snort::Rule;

$rule = Snort::Rule->new(

-action => 'alert',

-proto => 'tcp',

-src => 'any',

-sport => 'any',

-dir => '->',

-dst => '192.188.1.1',

-dport => '44444',

);

Setting Options for Your Rules:

You can customize your rules by setting various options:

$rule->opts('msg','Test Rule');

$rule->opts('threshold','type limit,track by_src,count 1,seconds 3600');

$rule->opts('sid','500000');

After setting your options, you can print out your rule using:

print $rule->string()."\n";

A Different Way to Write Rules:

If you prefer, you can also write your rules directly as a string:

$rule = 'alert tcp $SMTP_SERVERS any -> $EXTERNAL_NET 25 (msg:"BLEEDING-EDGE POLICY SMTP US Top Secret PROPIN"; flow:to_server,established; content:"Subject|3A|"; pcre:"/(TOPsSECRET|TS)/[sw,/]*PROPIN[sw,/]*(?/(25)?X[1-9])/ism"; classtype:policy-violation; sid:2002448; rev:1;)';

Parsing Your Rule String:

You can parse your rule string back into a Snort::Rule object:

$rule = Snort::Rule->new(-parse => $rule);

printf("%s\n", $rule->string());

The Purpose of Snort::Rule:

This tool simplifies the process of creating snort rules dynamically through scripts.

Imagine converting a list of malicious hosts into an array of Snort rule objects effortlessly.

With the string() method, you can easily save the list to a Snort rules file!