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IDS and IPS with Snort 3

Ready to Master Snort 3? Secure Your Network Now with the Next Gen Threat Defence course!

(IDS-IPS.AJ1)
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About This Course

The perimeter is dead. Modern networks require sophisticated, deep-packet inspection tools to detect and block threats in real-time. This is where Intrusion Detection System (IDS) and Intrusion Prevention System (IPS) mastery becomes essential, and Snort 3 is the definitive next-generation platform for the job. By focusing on the practical application of Snort 3, you will learn to build a formidable Defense-in-Depth (DiD) strategy, turning raw network packets into actionable intelligence. Whether you are aiming for a security analyst role, hardening a complex enterprise network, or optimizing existing IDS/IPS infrastructure, this program provides the practical skills to become a cutting-edge threat defender.

Skills You’ll Get

The curriculum is structured to provide a comprehensive, hands-on mastery of Snort 3 implementation, covering:

  • Foundations & Architecture: Master the fundamentals of Intrusion Detection System (IDS) and Intrusion Prevention System (IPS) strategies, understand the concept of Defense-in-Depth (DiD), and dissect the key components and modern, modular design of the Snort 3 Architecture.
  • Deployment & Configuration Tuning: Implement and tune Snort 3 from scratch, mastering installation on various Linux distributions, optimal configuration, efficient policy management, and high-performance data acquisition using the DAQ Layer.
  • Deep Packet Inspection: Analyze network traffic flow by mastering Packet Decoding across the OSI layers, utilizing various Inspectors (HTTP, Stream, DCE/RPC), and leveraging advanced functions like IP Reputation for sophisticated, context-aware threat analysis.
  • Rule Writing & Next-Gen Features: Develop and manage high-fidelity custom Snort Rules to mitigate specific threats, utilize the powerful Alert Subsystem, and leverage next-generation features like OpenAppID for application-aware Network Security Monitoring (NSM) and threat mitigation.
Download Course Outline

1

Introduction

  • Who this course is for
  • What this course covers
  • To get the most out of this course
  • Conventions used
2

Introduction to Intrusion Detection and Prevention

  • The need for information security
  • Defense-in-depth strategy
  • The role of network IDS and IPS
  • Types of intrusion detection
  • The state of the art in IDS/IPS
  • IDS/IPS metrics
  • Evasions and attacks
  • Summary
3

The History and Evolution of Snort

  • The beginning of Snort
  • Snort 1 – key features and limitations
  • Snort 2 – key features, improvements, and limitations
  • The need for Snort 3
  • Summary
4

Snort 3 – System Architecture and Functionality

  • Design goals
  • Key components
  • Snort 3 system architecture
  • Summary
5

Installing Snort 3

  • Choosing an OS for installing Snort 3
  • Snort 3 installation process
  • Installing Snort 3 on CentOS
  • Installing Snort 3 on Kali (Debian)
  • Summary
6

Configuring Snort 3

  • Configuring Snort 3 – how?
  • Configuring Snort 3 – what?
  • Configuring your environment
  • Optimal configuration and tuning
  • Managing multiple policies and configurations
  • Summary
7

Data Acquisition

  • The functionality of the DAQ layer
  • The performance of the DAQ Layer
  • Packet capture in Snort
  • The Snort 3 implementation of the DAQ layer
  • Configuring DAQ
  • Summary
8

Packet Decoding

  • OSI layering and packet structure
  • The role of packet decoding (Codecs)
  • Packet decoding in Snort 3
  • EthCodec – a layer 2 codec
  • IPv4Codec – a layer 3 codec
  • TcpCodec – a layer 4 codec
  • Code structure and other codecs
  • Summary
9

Inspectors

  • The role of inspectors
  • Types of inspectors
  • Snort 3 inspectors
  • Summary
10

Stream Inspectors

  • Relevant protocols for the stream inspector
  • The stream inspectors
  • Summary
11

HTTP Inspector

  • Basics of HTTP
  • HTTP inspector
  • HTTP inspector configuration
  • Summary
12

DCE/RPC Inspectors

  • A DCE/RPC overview
  • DCE/RPC inspectors
  • DCE/RPC rule options
  • Summary
13

IP Reputation

  • Background
  • Configuration of the IP reputation inspector module
  • Functionality of the IP reputation inspector
  • IP reputation inspector – alerts and pegs
  • Summary
14

Rules

  • Snort rule – the structure
  • Rule header
  • Rule options
  • Recommendations for writing good rules
  • Summary
15

Alert Subsystem

  • Post-inspection processing
  • Alert formats
  • Summary
16

OpenAppID

  • The OpenAppID feature
  • Design and architecture
  • Summary
17

Miscellaneous Topics on Snort 3

  • Snort 2 to Snort 3 migration
  • Troubleshooting Snort 3
  • Summary

1

Introduction to Intrusion Detection and Prevention

  • Performing Static Analysis with Ghidra
  • Using Syslog to Centralize Network Logs
  • Using the Metasploit RDP Post-Exploitation Module
  • Simulating a DoS Attack
  • Analyzing a Phishing Attack
  • Performing Reconnaissance on a Network
  • Configuring iptables to Allow or Deny Traffic
  • Creating Basic WAF Rules for a Web Application
  • Capturing Suspicious Traffic Using a Network-based IDS
2

The History and Evolution of Snort

  • Configuring Snort
3

Installing Snort 3

  • Configuring Snort 3
4

Alert Subsystem

  • Viewing Snort Alerts in Unified2 and Syslog Formats

Any questions?
Check out the FAQs

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This program is essential for Network Security Analysts, Security Engineers, Threat Hunters, and any IT professional responsible for deploying, maintaining, or optimizing network-based security solutions like an IDS or IPS.

 Yes. The course provides comprehensive coverage of Snort 3 in both passive (IDS) mode for monitoring and active (IPS) mode for real-time blocking, including the necessary configuration and tuning for each.

We go beyond basic templates. You will learn the advanced structure of Snort Rules, understand rule header and options, and practice writing high-fidelity rules that integrate with features like OpenAppID to minimize false positives and maximize detection rates.

  Yes, Snort 3 introduces a new, multi-threaded, modular Snort 3 Architecture for vastly improved performance and configuration management. The course dedicates content to understanding this evolution and the migration process from Snort 2.

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